Air Exchange Systems MN | Air to Air Exchange Systems MN

Posted by on Feb 14, 2012 in Air Exchange Systems, Heating and Air Conditioning System, Minnesota Furnace and AC Repair Service MN, Minnesota Heating and Air Conditioning Contractor | 0 comments

Air Exchanger Systems, Energy Recovery Ventilators and Indoor Air Quality This type of ventilation is a mechanical process in which the entire volume of stale air confined within a dwelling is exhausted to the outdoors, while fresh air is supplied back into the building. In many new homes, moisture trapped from within the building wall cavity may cause excessive moisture, therefore causing possible decay and structural rot. Other hazards may include possible internal depressurization and back-drafting of the building. This condition can cause dangerous levels of carbon monoxide to elevate within the home. It is highly recommended that any excess relative humidity is removed from the home by an air exchanger. Other concerns are homes that have been super-insulated beyond the required minimal standards by local code, excessive air tightness, lack of moisture prevention during the construction process, poor attic ventilation and minimal moisture barriers. How Does an Air-to-Air Heat Recovery Ventilator Work? Air Exchangers provide an effective means of ventilation for your home. There are several types of applications for your home. A typical installation usually occurs in the mechanical room near the furnace. HRV or (Heat Recovery Ventilator) are most beneficial in colder climates by recovering over 70% of sensible heat from indoor air. As the exhaust air passes through the heat recovery core, heat from the indoor air stream is transferred with fresh air back into the home. ERV or (Energy Recovery Ventilator) systems can recover additional heat, due to the latent heat of moisture removal from the air stream. These systems are very effective in warmer, more humid climates. Air Exchangers can provide continuous ventilation and moisture control for your home. Overall performance and health of your home is dependent on proper ventilation, humidification and precision temperature control. The design and application is essential in building function and system operation. Air Exchangers are a cost effective and efficient means of improving indoor air quality. Typical applications include residential homes, indoor pools, health clubs, smoking rooms, dental offices, beauty salons, automotive stations and much more. Moisture control is essential in maintaining a healthy indoor environment. Energy-efficient operation lowers operating costs. Annual electrical consumption of less than 2 amps is comparable to a 100 watt light bulb. Application may include pre-heat accessories, control modulation and duct fabrication. Benefits Of Air Exchangers If you have allergies or respiratory problems, you know the importance of fresh outdoor air.  Being in an air-tight home or office can cause some problems for people with these health issues.  Long Minnesota winters do not make it easier.  According to the EPA, studies have shown that air within homes can be more seriously polluted then even the most industrial cities.  With some people spending approximately 90% of their time indoors, they are more susceptible to the effects of indoor air pollution. Proper ventilation with an air exchanger could help. Even if your home is older and not tightly insulated, it is likely that in the winter, the air inside your home gets stale.  Air exchangers can help bring fresh outdoor air inside the home, while exhausting an equal amount of stale air, providing a healthy balance to your ventilation system. Air Exchange Ventilator (AEV) Benefits: Reduce excess humidity which can cause mold, mildew and deterioration to your home Reduce dangerous pollutant fumes or gases...

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Air Exchange Systems MN | Heat Recovery and Energy Recovery Ventilators

Posted by on Feb 9, 2012 in Air Exchange Systems, Furnace or AC System, Heating and Air Conditioning System, Minnesota Heating and Air Conditioning Contractor | 0 comments

Improving Indoor Air Quality Since the 1970s, when we started building tighter energy-efficient homes, the level of indoor air pollutants has steadily increased. Why? Contaminated air which once escaped through cracks around windows and doors is now trapped inside with you and your family. Today’s energy efficient construction methods make homes so tight that mechanical ventilation is needed to remove contaminants which cause mold, mildew or poor air quality. An energy saving Heat Recovery or Energy Recovery Ventilator is an ideal choice to bring a continuous supply of fresh, filtered air into your home while expelling stale air. Did You Know?  Everyday Activities add to Indoor Air Pollution Studies have found that simple things like mopping the kitchen floor, taking a shower, doing the laundry or just breathing can generate enough moisture in your home to raise the relative humidity to an unhealthy level. Increased humidity and moisture inside your home can lead to severe structural damage that you can’t see until it’s too late. Increased moisture levels can also dramatically affect your family’s health due to increased mold and mildew. Heat Recovery and Energy Recovery Ventilators Heat Recovery and Energy Recovery Ventilators are the next step in creating a clean, healthy environment for your family. What Are HRVs and ERVs? To understand these products and their functions, here are a few things to remember. Heat Recovery Ventilators (HRVs) are recommended for colder areas of the country that have longer heating seasons as well as drier desert areas of the South. Energy Recovery Ventilators (ERVs) are designed for warmer, humid climates with longer cooling seasons. Over a period of time, older homes began to sport new, tight windows and doors, insulation and vapor-barrier improvements, modern siding, and caulk for every crack through which air might pass. New homes left the drawing board designed to be tight, and builders became familiar with the new materials and skills needed to meet market demand and updated regulations. Homes were finally becoming thermally efficient. What some began to wonder, though, was whether they were livable. It turns out that those heat-robbing drafts had a role in the ecosystem of the home—they provided fresh air to breathe. Without realizing it, builders before the energy crisis had been installing an effective ventilation system. If you could afford the heating bills, it worked. How Do They Work? Heat Recovery Ventilators (HRVs) An HRV is designed to bring a continuous supply of fresh air into a home while exhausting an equal amount of contaminated air. HRVs use what is called a “sensible” heat recovery core. This special aluminum core transfers heat from the exhaust air stream to the incoming air stream. Fresh incoming air is tempered by the heat that is transferred from the outgoing air so you save on energy costs. Energy Recovery Ventilators (ERVs) Energy Recovery Ventilators work much like the HRV but it is designed with a different type core. The enthalpic core at the center of the unit transfers heat and moisture from the incoming air to the outgoing air. The air brought into the living area is cooled and the humidity is reduced for maximum comfort. The load on your air conditioner is less and you save on cooling costs. Depending on the model, HRVs can recover up to 85 percent of...

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Minnesota Furnace and AC Repair, Replacement and Installation

Posted by on Feb 7, 2012 in Furnace or AC System, Heating and Air Conditioning System, Minnesota Heating and Air Conditioning Contractor | 0 comments

The Weather In Minnesota Is getting Colder … Is Your Furnace Ready? The heating season has begun, and it’s time to have a thorough inspection and servicing of your furnace and heating system. A professional furnace service in the Minneapolis Saint Paul area is a must for safety and economical reasons. Don’t let your heating dollars go up the chimney or risk your family’s safety. Your heating and cooling system is a major investment in comfort. So why wouldn’t you spend a little bit of money each year to keep it running properly? Avoiding A Furnace Fire This Winter Living in the Minneapolis St Paul metro area means that your home’s heating system needs to be in top condition to handle our frigid winters without breaking the bank, and to eliminate health and safety risks for your family. After six months or more of being idle, your furnace and heating systems needs to be inspected and serviced before you turn up the thermostat and crank up the heat. Even if you’ve already started using your heating system, it’s not too late to have it inspected and any problems repaired. Putting off this important chore can lead to sudden heating system failures in the middle of a Minnesota winter, when furnace repair companies are extremely busy. Don’t risk having an emergency heating crisis by neglecting an annual furnace inspection and evaluation. Your Family’s Safety First Few homeowners have the skills, experience, and equipment needed to perform an adequate heating system inspection. Only a Minnesota professional heating and cooling contractor can properly inspect and service your furnace. For your family’s safety, this annual inspection is a must. A defective furnace can expose you and your family to deadly carbon monoxide gas. In addition, proper maintenance cuts down on the amount of allergens, toxic substances, and even germs that circulating through your home. Minnesota Furnace and AC Replacement Has your current heating and cooling system lived in your home longer than you? If an old outdated system has finally gone out, replacement is often a better option than repair. You don’t have to wait until that is the case though! Upgrading your heating and cooling system not only raises the value of your home, it can save you money and make your home more...

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Heating and Air Conditioning Sales, Service and Installation MN

Posted by on Feb 3, 2012 in Furnace or AC System, Heating and Air Conditioning System, Minnesota Heating and Air Conditioning Contractor | 0 comments

Minnesota Heating and Cooling Systems Whatever the condition might be outside, people can enjoy the comforts of their homes with heating and air conditioning units. But finding the right unit would basically depend on the dimensions of the house, where it is located and of course, your budget. Heating and conditioning equally work based on the tenet that the movement of heat always starts from an area of higher heat concentration to a lower one. So heaters and furnaces would raise the heat levels in order to make an area warmer whereas the air conditioner would eliminate the heat to make the area cooler. The common factor here is that, in doing this, heating and air conditioning units would utilize energy. Air conditioners would primarily use electricity while the majority of heating systems would make use of fuel oil or gas. Although, there are heating systems using electricity nowadays. A device called a heat pump can heat and cool air by extracting heated air inside the house during summer and pulling in heat from outside during winter. There are several types of heating systems in the market today. One system is the central heating which utilizes a heat pump or furnace to produce heat from a central location. It uses the process called hydronics where water is a heat transport channel and uses a ductwork and radiator to transfer heat into the air. Forced air system, on the other hand, propel heat via a ductwork system where it can be filtered. Alternatively, the heat provided by an electrical source uses a filament that turns hot once electricity passes through it. Air conditioners remove heat by either radiation or convection. The medium used, like water, air or chemicals are refrigerants. When these mediums will evaporate, it takes up the heat and returns it to the compressor to be cooled again. Common types are the window type air conditioner or the box-type. Another popular style is the central air conditioner type. This is difficult to install especially if the building was not built for it because of its cumbersome duct system. To install a standard ductwork would be too expensive or too wasteful to install. A ductless central-air approach is now feasible. These systems are popular where building styles prevent ductwork. Both heating and air conditioning units use a thermostat, a switch sensitive to heat, to control the amount of heat or cold air being generated. This will respond to any change in the temperature of the room where it is used. Modern thermostats are using solid-state electronics to control the air temperature bi-metallic strips used in older models. These are more accurate and quicker to respond to temperature changes. But the problem is, once the solid-state is damaged, it would indicate a need for replacement. Many heat and air conditioning systems today in the market have been modified to cater to the needs of the users. Most of these new units are designed to be energy efficient and are eco-friendly. In choosing the right system for use, make sure to have the area assessed so a correctly sized unit will be installed and for it to work efficiently. Remember that a more expensive unit is more cost-effective in the long run… So choose wisely. Minnesota Furnace and AC Installation &...

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Heating, Air Conditioning and Ventilation Systems MN

Posted by on Jan 31, 2012 in Air Exchange Systems, Heating and Air Conditioning System, Minnesota Heating and Air Conditioning Contractor | Comments Off on Heating, Air Conditioning and Ventilation Systems MN

January is National Radon Action Month – Now’s a Good Time to Test Your Home For Radon! January is National Radon Action Month for good reason. It’s the time of year when we spend the most time indoors, and a lot of that time is spent in the lowest levels of our homes, where radon levels tend to be higher. Radon is invisible and odorless, so you won’t know if you have it without the test. Now is a good time to check your heating, air conditioning or other ventilation systems! The easiest way to test for radon is to obtain a test kit. The kit is relatively inexpensive and easy to use. Most hardware stores sell the kit for $15 to $20, and you’ll spend a similar sum when you send the kit to the manufacturer to obtain the test results. If you do have high radon levels, you won’t have to move. Radon can be mitigated through various means. How Can I Find Out If My Home Has a Radon Problem? Radon is colorless, odorless and tasteless. Therefore, a radon test is the only way to find out how much radon is in your home. Performing a radon test on your own is easy, inexpensive, and can be done privately. Every home is unique due to its local soil, construction details, maintenance and degree of depressurization. Therefore, test results from nearby homes cannot be relied upon to predict the radon level in another home. Likewise, previous test results may not reflect current and future radon levels for a home that has been remodeled, weatherized or had changes made to its heating, air conditioning or other ventilation systems such as exhaust fans. Radon Reduction A heat recovery ventilator, or HRV, also called an air-to-air heat exchanger, can be installed to increase ventilation which will help reduce the radon levels in your home. An HRV will increase ventilation by introducing outdoor air while using the heated or cooled air being exhausted to warm or cool the incoming air. HRVs can be designed to ventilate all or part of your home, although they are more effective in reducing radon levels when used to ventilate only the basement. If properly balanced and maintained, they ensure a constant degree of ventilation throughout the year. HRVs also can improve air quality in homes that have other indoor pollutants. There could be significant increase in the heating and cooling costs with an HRV, but not as great as ventilation without heat recovery. The filter in an HRV requires periodic cleaning and should be changed twice a year. Replacement filters for an HRV are easily changed and are priced between $10 and $25. Ask your contractor where filters can be purchased. Also, the vent that brings fresh air in from the outside needs to be inspected for leaves and debris. The ventilator should be checked annually by a Minnesota heating, ventilating, and air conditioning professional to make sure the air flow remains properly balanced. HRVs used for radon control should run all the time. The MDH recommends that all Minnesota homeowners test their homes for radon. The results of a properly performed radon test will help homeowners determine for themselves if they need to take further action to protect their family from the health risks...

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MN Air Exchange System | Energy Recovery System

Posted by on Jan 26, 2012 in Air Exchange Systems, Heating and Air Conditioning System, Minnesota Heating and Air Conditioning Contractor | 0 comments

Energy Recovery Ventilation Systems | Improve Indoor Air Quality Your homes require the most efficient energy recovery ventilation system to ensure costs are manageable. Energy recovery ventilation systems work by cutting the costs entailed in heating ventilated air during winter months.  This is done by shifting the heat being produced from the warm inside air into the fresh, cold supply air. On the other hand, ventilation cooling expenses are reduced during the summer months when the inside air cools down the warm supply air. What Are HRVs and ERVs? To understand these products and their functions, here are a few things to remember. Heat Recovery Ventilators (HRVs) are recommended for colder areas of the country that have longer heating seasons as well as drier desert areas of the South. Energy Recovery Ventilators (ERVs) are designed for warmer, humid climates with longer cooling seasons. Homeowners and business owners must be aware that they can choose from two energy-recovery systems: Heat Recovery Ventilators (HRV) Energy-Recovery (or Enthalpy-Recovery) Ventilators (ERV) Aside from some controls, both the HRV and ERV feature a heat exchanger wherein one or several fans direct air through the machine. The most common models are the whole-house ventilation systems that are fitted with shared ductwork or their own duct system. HRV and ERV differ on how the heat exchanger operates. A specific amount of water vapor in addition to heat energy is being transferred by the heat exchanger under an energy recovery ventilator system. On the other hand, it is only heat that the heat recovery ventilator transfers. Under an ERV system, house air humidity remains constant because some of the moisture situated in the exhaust air is shifted to the less humid incoming winter air. This way, freezing problems are minimized as the heat exchange core becomes warmer. Also, energy recovery ventilator allows the control of house humidity during the summer since several water vapor are shifted in the incoming air to the drier air that is exiting the house. The energy-recovery ventilator usually performs better compared to a heat recovery system in controlling humidity in air conditioners. In places that have extreme winters or summers and where the costs of fuel are expensive, it is very effective to use energy recovery ventilation systems. This is because ERV has an energy recovery of around 70-80% in the exiting air and then divert that energy to the incoming air. People pay more for electricity generated by the system fans than the savings generated from not being able to condition the supply air. Install and Maintain Energy Recovery Systems A simple approach usually plays an important role in cost-efficient installation process. An existing ductwork usually hosts different systems to cut installation cost charges. More electricity and additional maintenance work are needed under complex systems, making their installations costs prohibitive. It is also not advisable in most houses to recover the entire energy in the exhaust air as the process becomes more expensive plus the fact that there are only a few designated HVAC contractors who have the technical know-how to handle the installation. What is generally needed is a supply and return duct for every room and every common living area. It is also essential that duct runs must be straight and short. Enhanced performance and system pressure drops must...

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MN Air Exchange Systems | MN Air Exchanger | Air Quality

Posted by on Jan 24, 2012 in Air Exchange Systems, Heating and Air Conditioning System, Minnesota Heating and Air Conditioning Contractor | 0 comments

Control The Moisture In Your Home | Air Exchange Systems According to the EPA, air trapped inside the average home is five times more dangerous than outside air. In fact, of all the chemicals regulated by EPA, only two are more prevalent outdoors than indoors. This is important considering the average person spends 90% of their time indoors. To keep the air inside healthy, balanced mechanical ventilation is used to control the exchange of stale air with fresh air. Avoiding Mold & Moisture Problems With Good Ventilation see Mold Control The quantity of mold fragments and spores needed to cause health problems varies from person to person.  Besides inhalation, people can become exposed to mold through skin contact and eating moldy food. Toxic molds can produce several toxic chemicals called mycotoxins that can damage your health. These chemicals are present on the spores and small mold fragments that are released into the air. In high concentrations, mold fragments, spores, and mycotoxins can trigger symptoms even in individuals who have no allergies. Recent studies have linked mold to the rapid rise of the asthma rate over the past 20 years. A 1999 Mayo Clinic study implicates fungus as the cause of almost all of the chronic sinusitis afflicting 37 million Americans. Toxic molds can increase your susceptibility to a wide variety of diseases by weakening your immune system. Molds reproduce by spreading microscopic spores. Mold spores waft through the indoor and outdoor air continually. When mold spores land on damp organic material, such as wood, paper, feathers, hair, cellulose, petroleum products, rubber, carpet, etc., they may begin growing and digesting the material. Some molds live in temperatures below freezing, and some like it as warm as 122° F.  Molds primarily thrive and become a problem when the relative humidity level is above 60%, with temperatures between 50 and 90 degrees  F. (10 to 32 degrees C.)  and a pH from 3 to 8. Molds also tend to be more robust in poorly ventilated areas with little air movement to disrupt their growth. Control The Moisture and Your Control The Mold ASHRAE Relative Humidity Levels There is no practical way to eliminate all mold and mold spores in the indoor environment; the way to control indoor mold growth is to limit moisture. During humid weather, avoid excessive ventilation and use an air conditioners and/or dehumidifier to keep relative humidity below 60%. Certain production and technical processes and treatments in factories, laboratories, hospitals and other facilities require specific relative humidity levels to be maintained using humidifiers, dehumidifiers and associated control systems. Sealing air leaks in the building’s exterior and using a mechanical ventilation system to provide fresh filtered air can help to reduce entry of mold spores and make it easier to keep indoor relative humidity below 60%. State of Minnesota Guidelines for Managing Indoor Air Quality Energy Recovery Ventilator An energy recovery ventilator saves energy and helps to keep indoor humidity within a healthy range. It transfers heat and moisture between the incoming and outgoing air. Energy Recovery Ventilator   If you’re concerned about the quality of air in your home, Patton Heating & Air Conditioning is the leading authority on air exchanger systems, energy recovery ventilators and indoor air quality. We can install, service, repair and maintain all types of...

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Heating, Cooling & Ventilating Your Home MN

Posted by on Jan 22, 2012 in Heating and Air Conditioning System, Minnesota Furnace and AC Repair Service MN, Minnesota Heating and Air Conditioning Contractor | 0 comments

Minnesota HVAC Contractor | Heating and Cooling Contractor MN Air infiltration can account for up to one third of a home’s heating and cooling costs and can contribute to problems with moisture, noise, dust, pollutants, pests, and insects. Reducing infiltration can significantly cut heating and cooling costs, improve building durability, and create a comfortable indoor environment. Why should you check the air quality of your home? Because you breathe it all day and all night long. If there is something in the ducts or ventilation system, such as microbes, mildew (or worse, animals), you and your family might be breathing in these toxic substances all day, every day. Why Is Ventilation Important? There are too many threats that can weaken or destroy the indoor air quality in your home. Getting the facts about this problem is a high priority. Homes need ventilation for a number of reasons. At the most basic level, occupants need air to breathe and the products of respiration (carbon dioxide and water vapor) must be removed. Beyond these basic requirements, occupants expect a safe and comfortable environment. In addition to thermal comfort (temperature and humidity control) occupants expect “acceptable indoor air quality”. Source control and ventilation are the primary means of providing acceptable indoor air quality in residences. While here we will focus on whole-house ventilation, it is important that the homeowner understand that source control of pollutants and localized ventilation are equally necessary. This involves practices such as using building materials, furnishings, finishes, and cleaning products and processes that emit low levels of non-toxic VOCs, as well as using localized ventilation to exhaust air from kitchens when cooking and bathrooms when showering. How is Ventilation Provided? Traditionally, ventilation in residences has been by operable windows and occupant controlled exhaust fans in combination with natural infiltration through openings, joints and cracks in the building envelope. As the importance of energy conservation has increased, houses are being built tighter. Concerns over the ability of these methods to provide adequate ventilation on a consistent basis have led to increased utilization of mechanical ventilation in residential construction. Several states have adopted or are considering adoption of ASHRAE Standard 62.2-2007. Several other states (Minnesota, Vermont, and Washington) have incorporated requirements for mechanical ventilation in their state energy codes that exceed the ventilation rates in the current standard. In Canada, the National Building Code requires mechanical ventilation at levels that exceed ASHRAE Standard 62.2-2007. Minnesota homes are built under the motto “Build It Tight & Ventilate It Right.” Your home needs you to run and maintain your mechanical ventilation system in order for it to operate correctly.   The phrase “build tight, ventilate right” summarizes the design philosophy of many energy-conscious designers. Minnesota is one of the only states with this requirement because of the tight air sealing and insulation requirements.  Most builders use either an air exchanger or a continuously exhausting fan(s) to meet this energy code requirement.  Air exchangers can be heat recovery ventilators (HRVs) or energy recovery ventilators (ERVs). How Much Ventilation Do I Need? Providing a comfortable indoor environment for building occupants is the primary concern of architects, designers, builders, and HVAC engineers. The American Society of Heating, Refrigerating, and Air- Conditioning Engineers (ASHRAE) is the leading technical organization active in the development of building ventilation standards....

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Heating, Ventilation, and Air Conditioning Contractor Cedar MN

Posted by on Jan 19, 2012 in Heating and Air Conditioning System, Minnesota Furnace and AC Repair Service MN, Minnesota Heating and Air Conditioning Contractor | 0 comments

What’s All The Talk About Indoor Air Quality? You’ve heard it on TV and read about it in magazines. The news is everywhere. The air inside your home can be up to five times more polluted than the air outside. Since the 1970s, when we started building tighter energy-efficient homes, the level of indoor air pollutants has steadily increased. Ventilation and Indoor Air Quality Although we usually can’t see them, air pollutants are all around us, already inside our homes, and waiting to come in from outside. From our yards to our kitchens, dangerous air pollutants threaten our home health and air quality. Plus, each season brings its own dangers, from mold in the fall and winter to pollens and high humidity in the spring and summer. Proper ventilation helps improve indoor air quality. Ventilation can control indoor humidity and airborne contaminants, both of which either contribute to or act as health hazards. The American Society of Heating, Refrigerating, and Air Conditioning Engineers (ASHRAE) and several states (Minnesota, Washington, and Vermont) have ventilation standards designed to ensure acceptable indoor air quality. High indoor humidity can spur mold growth. High humidity may result from poor construction/rehabilitation, site design that does not properly manage water, and/or inadequate air exchange. A reasonable target for relative humidity is 30-60 percent. A low cost hygrometer, available at hardware stores, can be used to measure relative humidity. In cool climates, inadequate ventilation in the winter can contribute to excessive moisture and humidity because normal activities create moisture (cooking, bathing, breathing), and there is insufficient natural ventilation (opening windows) or mechanical ventilation (fans, exhaust systems) to remove the moisture. In warmer climates, the heating, ventilation, and air conditioning (HVAC) system can pull warmer, humid air inside. In this case, the ventilation system may help create indoor humidity problems unless the system also dehumidifies the air. Ventilation can be provided by natural airflow through doors and windows. A heat exchanger (heat or energy recovery ventilation) is an efficient and economical way to have air exchanged and yet reduce heating and cooling costs. Common sources of airborne contaminants include: Indoor contaminants. These include chemicals used in the construction or renovation of buildings (e.g., glues, off-gassing from carpets, emissions from particle board, cleaning compounds). In addition, appliances that burn gas can produce particulates and carbon monoxide. Incomplete combustion and poor ventilation of these appliances (cook stoves, gas furnaces, gas boilers, and gas water heaters) can contribute to indoor contaminants. Gas cook tops should be used with fans that send exhaust outside. Gas-fired heating appliances should be sealed and power-vented systems installed to remove products of incomplete combustion. Wood-burning stoves can also create particulates and must be vented outside. Outdoor contaminants. Outdoor particulates can be drawn inside when the heating or cooling system draws air into a home. Particulates and allergens found in outdoor air can be asthma triggers. Filtering incoming air for HVAC systems effectively filters particulates. Experts recommend using filters with a MERV 6-8, but higher MERV levels trap smaller particles and generally are more appropriate for those with allergies or where the indoor environment has a high concentration of mold spores, dust particles, or other allergens. Two types of ventilation can help control harmful air contaminants and humidity: spot ventilation and dilution ventilation. Spot ventilation draws air...

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MN Heating and Air Conditioning Contractor

Posted by on Jan 17, 2012 in Air Exchange Systems, Heating and Air Conditioning System, Minnesota Heating and Air Conditioning Contractor | 0 comments

Air Exchanger Systems, Energy Recovery Ventilators and Indoor Air Quality Ventilation – What is a Mechanical Ventilator, and why it is important in my HVAC system? Today’s energy efficient homes trap stale air indoors, causing poor air quality and potential health problems for you and your family.  What can you do?  Restore your home with fresh, clean outdoor air.  A ventilator moves stale, contaminated, air from inside the house to outdoors. At the same time they draw fresh oxygen-laden air from outside and distribute it throughout the house. Stale, polluted air is constantly being replaced by an equal quantity of fresh clean air, while retaining energy and reducing homeowner utility costs. Heat recovery ventilation-HRVs and ERVs can be stand-alone devices that operate independently, or they can be built-in, or added to existing HVAC systems. For a small building in which nearly every room has an exterior wall, then the HRV/ERV device can be small and provide ventilation for a single room. A larger building would require either many small units, or a large central unit. The only requirements for the building are an air supply, either directly from an exterior wall or ducted to one, and an energy supply for air circulation, such as wind energy or electricity for a fan. When used with ‘central’ HVAC systems, then the system would be of the ‘forced-air’ type. How Do I Know Which One To Use In My Area? HRVs are recommended for most regions of North America, where the heating season is longer than the cooling season.  In winter, HRVs retain heat from outgoing air and transfer to incoming air.  In summer HRV’s work in reverse, retaining cooler air conditioned air and transferring to incoming fresh air.  [NOTE:  As defined by AHR standards, only areas of the SouthEast U.S. subject to significant outdoor humidity for extended periods throughout the year should consider an ERV. ERVs are recommended in regions where high outdoor humidity is cause for operating air conditioning/ dehumidification for an extended period of the year, and much more frequently than a heating system.  The ideal geographic area of use defined by AHR standards is the Southeast U.S. – Florida, Georgia, Alabama, Mississippi, and Carolinas only.  ERVs are NOT recommended in any region of Canada, or in the United States where temperatures fall below 25F (-4C) for more than five days, where freezing of the internal core can occur. The climate conditions where you live will determine whether you need a Heat Recovery Ventilator or an Energy Recovery Ventilator. HRV’s are usually recommended for colder climates with longer heating seasons. ERV’s are used for warmer more humid climates with long cooling season. See map for reference. How Does It Work? Ventilation products (HRV/ERV) move stale, contaminated, air from inside the house to outdoors. At the same time they draw fresh oxygen-laden air from outside and distribute it throughout the house. Stale, polluted air is constantly being replaced by an equal quantity of fresh clean air. Consult a Minnesota Heating and Air Conditioning Contractor for more information, and to find the best air exchange system for your specific region and lifestyle...

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