Fresh-Aire UV is an innovation leader in the field of indoor air quality. Our award-winning UV light and carbon products fight mold, bacteria, viruses and odors in commercial and residential HVACR systems. Our products include Blue-Tube UV®, the world’s most popular germicidal UV light, the revolutionary APCO® PCO/carbon whole-house air purifier, and Mini UV the first UV light system designed specifically for mini-split AC systems.
Air conditioning is common in the US, with 88% of new single-family homes constructed in 2011 including air conditioning, ranging from 99% in the South to 62% in the West.[50] In Canada, air conditioning use varies by province. In 2013, 55% of Canadian households reported having an air conditioner, with high use in Manitoba (80%), Ontario (78%), Saskatchewan (67%), and Quebec (54%) and lower use in Prince Edward Island (23%), British Columbia (21%), and Newfoundland and Labrador (9%).[51] In Europe, home air conditioning is generally less common. Southern European countries such as Greece have seen a wide proliferation of home air-conditioning units in recent years.[52] In another southern European country, Malta, it is estimated that around 55% of households have an air conditioner installed.[53] In India AC sales have dropped by 40%[clarification needed] due to higher costs and stricter energy efficiency regulations.[54]
If your furnace sputters to a halt during the evening or overnight in the middle of winter, you can bet that the indoor temperature will plummet by morning and everyone will be cold and uncomfortable. It isn’t as bad as outside because you have wind protection and residual heat, but no one in the house will be happy. The key to finding a quick solution to these kinds of scenarios is to align yourself with a reputable, reliable service provider before there is a problem. If you have a local expert in your corner, you can call as soon as something happens and your service disruption will be minimal.

When it comes to furnace repair, Roswell and area residents can rely on us for fast and efficient repairs. Moncrief has continued to be a consistent provider of heating and cooling services in the Roswell and Marietta. We have worked hard to gain your respect by providing quality services and products, and delivering on our promise of total comfort for your home and family while providing energy and cost savings.
Just had a well knowledge maintenance tech from A-OK come out and maintenance my AC unit and furnace. He informed me about all my safety’s were working properly and my Freon was well charged, cleaned my coils and drain, replaced my filter and checked the temps in all my supply’s. This young mans name was Mike and I would recommend him to come out to all my friends and family’s homes for maintenance.

Any forced air system in your home - whether it is powered through electric or gas-generated energy - requires a blower motor. This component consists of an electric motor and fan, and is responsible for pushing air evenly through the furnace. As hvac.com points out, you can easily identify the blower motor in your furnace as the part that looks similar to a hamster wheel at the bottom of the unit. If it stops working, the air needed to heat your home will no longer be pushed through the furnace to be heated and distributed evenly. In that case, you need to inquire about potential repairs. Blower motor repair typically costs between $150 for a simple fix, and $450 for complete replacement and installation of the part. Where you land on that range depends on the exact damage.


Air conditioner inverter Air door Air filter Air handler Air ionizer Air-mixing plenum Air purifier Air source heat pumps Automatic balancing valve Back boiler Barrier pipe Blast damper Boiler Centrifugal fan Ceramic heater Chiller Condensate pump Condenser Condensing boiler Convection heater Cooling tower Damper Dehumidifier Duct Economizer Electrostatic precipitator Evaporative cooler Evaporator Exhaust hood Expansion tank Fan coil unit Fan heater Fire damper Fireplace Fireplace insert Freeze stat Flue Freon Fume hood Furnace Furnace room Gas compressor Gas heater Gasoline heater Geothermal heat pump Grease duct Grille Ground-coupled heat exchanger Heat exchanger Heat pipe Heat pump Heating film Heating system High efficiency glandless circulating pump High-efficiency particulate air (HEPA) High pressure cut off switch Humidifier Infrared heater Inverter compressor Kerosene heater Louver Mechanical fan Mechanical room Oil heater Packaged terminal air conditioner Plenum space Pressurisation ductwork Process duct work Radiator Radiator reflector Recuperator Refrigerant Register Reversing valve Run-around coil Scroll compressor Solar chimney Solar-assisted heat pump Space heater Smoke exhaust ductwork Thermal expansion valve Thermal wheel Thermosiphon Thermostatic radiator valve Trickle vent Trombe wall Turning vanes Ultra-low particulate air (ULPA) Whole-house fan Windcatcher Wood-burning stove
A more efficient method of controlling humidity is to use the waste heat from the refrigeration cycle itself. Instead of rejecting the waste heat outdoors, the heat is directed inside when humidity control is required. One form of heat reclaim is called hot-gas reheat or “refrigerant desuperheating” where refrigerant is passed through a heat exchanger located downstream of the cooling coil. The hot high pressure vapor leaving the compressor passes through this heat exchanger prior to entering the condenser coil. This in turn heats the indoor air and again causes the AC system to run longer to meet the thermostat set point. Although more energy is used, this is much more efficient than turning on an electric heater. Another form of heat reclaim is called sub-cool reheat. This strategy takes the warm liquid refrigerant from the condenser and passes it through a heat exchanger located downstream of the cooling coil. Less heat is available using this method because the majority of the heat has already been rejected at the condenser. Since more energy is used to pump liquid (as opposed to a gas) through the heat exchanger it would appear that this method is less efficient than the hot-gas method, however, the liquid in the heat exchanger is sub-cooled in the cold supply air stream which increases the capacity of the air conditioner. Since more capacity is available, the AC units is able to meet the thermostat more quickly.
Refrigerant Metering Device -- Every HVAC system has one of these, and heat pumps have two. They regulate the amount of refrigerant going through your air-conditioner. If it fails, either too much or too little refrigerant will course along the lines and either not perform well or will overwhelm the compressor and cause it to fail. A total failure of this component will result in a complete loss of operation.

There are a number of claims in the HVAC industry that make HVAC technicians sound like they know what they are doing, but the North American Technician Excellence (NATE) certification program is the only closed book examination and certification program, administered by a third party, that tests real world working knowledge of HVAC systems. That's why all of our service technicians complete and continue NATE certification training throughout their career with SMO.


When you change the temperature on your thermostat, or the temperature in your home drops, a signal lets the furnace's igniter know that it's time to turn on. Igniters exist in both hot water boilers and forced air furnaces, replacing pilot lights as the switch your unit needs to kick on. Naturally, this is a core part in making sure it works reliably. When it stops working, your unit will not longer know when to actually heat your home. Fortunately, furnace igniter repair doesn't tend to be a major budget problem, and costs less than $300 on average.
Feel perfectly comfortable at home with our innovative Lennox Residential heating, cooling and air quality systems. Lennox manufactures high-efficiency HVAC systems including furnaces and air conditioners designed to conserve energy and save money. Our complementing air filtration systems, humidifiers and dehumidifiers help keep indoor air quality healthy and clean.
In the refrigeration cycle, heat is transported from a colder location to a hotter area. As heat would naturally flow in the opposite direction, work is required to achieve this. A refrigerator is an example of such a system, as it transports the heat out of the interior and into its environment. The refrigerant is used as the medium which absorbs and removes heat from the space to be cooled and subsequently ejects that heat elsewhere.
At Donelson Air Service Experts Heating & Air Conditioning, we understand heating and air conditioning, which is why we back up our work with our 100% Satisfaction Guarantee*. Not only does it demonstrate our confidence that you’ll be happy with the furnace repair we have completed, it holds us to a higher standard, ensuring that we continue to provide you with superior service without fail. When it’s time to handle any heating and cooling question or issue you have, know that you can trust the experts at Donelson Air Service Experts regardless of what the Nashville weather brings.
Deciding the best option for your cooling needs can be confusing and exhausting when looking at everything available in the industry.  We want to provide you with information that is concise and easy to understand how they operate.  Information is knowledge and knowledge is power, so we want to give you the power to buy smart for both your wallet and your needs!  Below are the most common types of air conditioning systems and the process by which they operate.

While there's nothing you can do to guarantee your air conditioner or furnace will never need repairs, there are ways to take better care of your system. Changing out the air filters every 3-6 months, making sure nothing is obstructing or interfering with the outside unit, and keeping all vents unblocked in well-used rooms will help keep your air conditioning and heating system operating efficiently.
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