You can install the greatest HVAC system ever built, but if your house is not insulated well, it's only going to end up costing you more money. Older homes may have fiberglass insulation that has broken down due to pests, moisture, or improper installation. Spray foam insulation can be damaged by careless repair or modification work or can be improperly installed. If your insulation in compromised, your attempts to save money and be comfortable will be in vain.
Refrigerant 22 (R-22 or MonoChloroDiFlouroMethane, CHClF2) is one of the most common refrigerants and is used in a wide variety of applications such as refrigeration, aerosol propellants, cleaning solvents, and foaming agents for plastics. This refrigerant is believed to be partially responsible for damaging the earth’s ozone layer and it’s use is being phased out over the next two decades. The ozone layer is a result of sunlight reacting with oxygen to produce a layer in the stratosphere more than 10 km above the earth’s surface. As R-22 refrigerant escapes from an AC system through leaks or is released into the atmosphere by other means, the R-22 molecule containing the chlorine atom (“monochloro”) rises in the atmosphere. Sunlight breaks down the R-22 molecule to yield a free chlorine radical (Cl-). The free chlorine radical combines with ozone (O3), decomposing it into normal oxygen (O2).
The 2nd-century Chinese mechanical engineer and inventor Ding Huan of the Han Dynasty invented a rotary fan for air conditioning, with seven wheels 3 m (10 ft) in diameter and manually powered by prisoners of the time.[6] In 747, Emperor Xuanzong (r. 712–762) of the Tang Dynasty (618–907) had the Cool Hall (Liang Dian 涼殿) built in the imperial palace, which the Tang Yulin describes as having water-powered fan wheels for air conditioning as well as rising jet streams of water from fountains. During the subsequent Song Dynasty (960–1279), written sources mentioned the air conditioning rotary fan as even more widely used.[7]
As a full-service heating contractor, we strongly encourage you to be vigilant with annual heating maintenance. Without proper maintenance, a heat pump, furnace or boiler might last only half as long as a well-maintained unit. Don’t tempt fate by skimping on annual service. We offer an economical, yet comprehensive maintenance agreement that we call our Cool Care Service Agreement. With our maintenance agreement you’ll receive:
Our technicians explain all of your options before beginning the repair, so you can decide whether a repair or replacement is best for you. Our No Surprises Pricing—including charging by the job, not by the hour—means the price we quote you is the price you pay. If you decide that replacing your furnace is the best course of action, we can install a new, high-efficiency model in its place.

This may apply to a system using fresh air for cooling the space or a water cooled or glycol cooled system with an additional coil that provides chilled water cooling when the outdoor ambient is cold; thereby reducing or eliminating compressor operation. These systems may provide free cooling for up to 80% of their operating life, particularly when operating in Northerly climates. See our Free Cooling page for more information.
If a failure occurs, LED lights on the control board light up in a blinking pattern to indicate a specific failure code. The codes are listed in a chart in the owner's manual and usually on a door or access panel on the furnace. Control boards are usually located inside the blower compartment of the furnace. If the board has blinking lights, refer to the chart to decipher the code and help identify the problem area with the furnace. 
Saving you money – When you have an emergency furnace repair, one concern that comes to mind is how much it will cost to repair your furnace. Many companies will charge an additional fee to come to your home in the middle of the night or on the weekend. That’s not us. We never charge an emergency fee. Keeping your repair costs affordable is of utmost importance to us.
American design standards are legislated in the Uniform Mechanical Code or International Mechanical Code. In certain states, counties, or cities, either of these codes may be adopted and amended via various legislative processes. These codes are updated and published by the International Association of Plumbing and Mechanical Officials (IAPMO) or the International Code Council (ICC) respectively, on a 3-year code development cycle. Typically, local building permit departments are charged with enforcement of these standards on private and certain public properties.
An air conditioner's compressor contains a refrigerant. As it works, it sends this refrigerant through the system. As warm air blows across the coil that carries this refrigerant, the heat transfers to the refrigerant (cool always absorbs warm). A fan moves the cooled air through the ducting and out of vents that lead into the rooms of your house. The refrigerant returns to the compressor where the absorbed heat is moved outside. The refrigerant is then sent through the coil once again to continue the cycle.

Do you need expertise in HVAC? Roswell and Marietta residents who choose Moncrief Heating & Air Conditioning get the benefit of over 118 years of reputable experience in air conditioning and furnace repair, service and installation. Whether you have an emergency or need routine service, we are available 365 days a year. Call us today at 404-350-2300.
Today’s heaters are technological wonders that will keep you warm and save you money. Investing in an energy-efficient heating system can raise the value of your property, and the cost of installation will be realized on the amount you’ll save on utility bills. With Cool Care Heating & Air, you can count on proper sizing and a hassle-free installation process. The new unit may also qualify for energy-efficient incentives, and Cool Care Heating & Air offers periodic dealer rebates on select replacement systems. If your heating system is 10-15 years old, needs frequent repair work and isn’t keeping you as warm as it used to, it’s probably approaching the end of its lifespan. Replacing the unit before it dies altogether can save you time, trouble and money.
HVAC System Quality Installation Contractor Checklist -- This checklist identifies all of the steps the contractor has taken for the Energy Star Certification and identifies what work the contractor has done. If the system is later modified, this checklist can help identify what was done to proper Energy Star specifications and what was added later that may not meet the requirements.

Natural ventilation is the ventilation of a building with outside air without using fans or other mechanical systems. It can be via operable windows, louvers, or trickle vents when spaces are small and the architecture permits. In more complex schemes, warm air is allowed to rise and flow out high building openings to the outside (stack effect), causing cool outside air to be drawn into low building openings. Natural ventilation schemes can use very little energy, but care must be taken to ensure comfort. In warm or humid climates, maintaining thermal comfort solely via natural ventilation might not be possible. Air conditioning systems are used, either as backups or supplements. Air-side economizers also use outside air to condition spaces, but do so using fans, ducts, dampers, and control systems to introduce and distribute cool outdoor air when appropriate.

Air-source heat pumps are more popular in milder winter climates where the temperature is frequently in the range of 4–13 °C (40–55 °F), because heat pumps become inefficient in more extreme cold. This is because ice forms on the outdoor unit's heat exchanger coil, which blocks air flow over the coil. To compensate for this, the heat pump system must temporarily switch back into the regular air conditioning mode to switch the outdoor evaporator coil back to being the condenser coil, so that it can heat up and defrost. A heat pump system will therefore have a form of electric resistance heating in the indoor air path that is activated only in this mode in order to compensate for the temporary indoor air cooling, which would otherwise be uncomfortable in the winter.
In a chilled water system, liquid water is pumped throughout the building to “chilled water coils”. Since the liquid water needs to be at a cold temperature, a “cooling plant” is required. The plant is typically referred to as a chiller plant. Vapor compression equipment in the plant, similar to that described in “How does my AC work”, cool water to a cold temperature and pump the cold water to air-to-water heat exchangers where needed.
Whether you’re looking to have a heat pump installed for the first time or think it’s time for an upgrade to your current system, Goettl Air Conditioning is the company to call. We offer a great lineup of Phoenix heat pumps and will make sure that the one we install in your home is the recommended match to your home’s dimensions and your family’s needs.

R22 (also known as HCFC-22) has a global warming potential about 1,800 times higher than CO2.[61] It was phased out for use in new equipment by 2010, and is to be completely discontinued by 2020. Although these gasses can be recycled when air conditioning units are disposed of, uncontrolled dumping and leaking can release gas directly into the atmosphere.


We are service professionals! As licensed contractors and specialists in the field of heating and air conditioning, we have the tools, the equipment, and the experience to keep your equipment running smoothly all year long. If it is emergency service that you need we are available to assist you! To help reduce service emergencies, we offer service agreements to keep your comfort system running at peak performance.
In 1758, Benjamin Franklin and John Hadley, a chemistry professor at Cambridge University, conducted an experiment to explore the principle of evaporation as a means to rapidly cool an object. Franklin and Hadley confirmed that evaporation of highly volatile liquids (such as alcohol and ether) could be used to drive down the temperature of an object past the freezing point of water. They conducted their experiment with the bulb of a mercury thermometer as their object and with a bellows used to speed up the evaporation. They lowered the temperature of the thermometer bulb down to −14 °C (7 °F) while the ambient temperature was 18 °C (64 °F). Franklin noted that, soon after they passed the freezing point of water 0 °C (32 °F), a thin film of ice formed on the surface of the thermometer's bulb and that the ice mass was about 6 mm (1⁄4 in) thick when they stopped the experiment upon reaching −14 °C (7 °F). Franklin concluded: "From this experiment one may see the possibility of freezing a man to death on a warm summer's day."[9]
There are multiple reasons to replace your HVAC system. If you have built additions onto your house, you may find your old system no longer meets the requirements for the new dimensions. Perhaps a new technological breakthrough has provided features that will improve your comfort and air quality. Most often, however, you need to replace your system because it no longer works properly.
We’ve earned a reputation across Portland and The Dalles for dedicated customer service.  Consistently maintaining an A+ rating from the Better Business Bureau, Sky Heating & Air Conditioning meets higher standards of excellence through the little, important details that add up to a job well done.  It starts with a friendly voice on the phone, and the immediate focus of our extensive resources on your requirements.  From there, you can count on timely arrival, organized project management, careful cleanup, competitive pricing, and exemplary performance in every aspect of service.  When you contact Sky Heating & Air Conditioning for HVAC service in The Dalles and Portland, OR, your project is always handled by a highly-trained professional, who will achieve your goals for efficiency, reliability, and sustainable home comfort.
Serving Families in Green Valley, Sahuarita & the Surrounding Communities since 1968, Green Valley Cooling & Heating has built a solid reputation for reliable and affordable temperature control solutions.  We create healthier and more comfortable indoor environments, protect against energy waste, and ensure sustainable performance through skilled service, quality products, and proven strategies.  No matter what type of challenge you’re faced with, count on Green Valley Cooling & Heating for expert assistance and sustainable results.  We provide new heating/cooling system installation, replacement, seasonal maintenance, prompt repair, air quality analysis, and energy saving opportunities to homeowners across Green Valley, Tubac, Vail, Corona de Tucson, Sahuarita & Amado.
Whether you’re looking to have a heat pump installed for the first time or think it’s time for an upgrade to your current system, Goettl Air Conditioning is the company to call. We offer a great lineup of Phoenix heat pumps and will make sure that the one we install in your home is the recommended match to your home’s dimensions and your family’s needs.
Saving you money – When you have an emergency furnace repair, one concern that comes to mind is how much it will cost to repair your furnace. Many companies will charge an additional fee to come to your home in the middle of the night or on the weekend. That’s not us. We never charge an emergency fee. Keeping your repair costs affordable is of utmost importance to us.

Whether you are in need of new installation, system replacement, seasonal maintenance, or prompt repair, M and M, Heating & Cooling, Plumbing & Electrical lives up to your highest expectations for quality, pricing, reliability, and quick turnaround on all projects.  And our commitment isn’t limited to regular business hours.  We’re always available when you need us, providing 24 hour Emergency Service across Longmont, Dacono, Frederick, Firestone, Mead, Erie & Johnstown, CO.  Trust the #1 Rated and Certified – A/C, Heating, and Plumbing Experts.
By combining immediate results with sustainable performance, we protect the value of your investment.  We provide skilled installation, maintenance, and repair of gas furnaces, heat pumps, dual fuel systems, boilers, air conditioners, air quality products, traditional and tankless water heaters, and advanced duct cleaning services.  Welzig Heating & Air is the right choice for  the comfort, safety, and health of homes or offices across Boulder, Longmont, Louisville, Lafayette, CO & more.
For a scheduled or emergency HVAC repair, you can count on SMO Energy and our team of certified technicians. We’re ready 24 hours a day and seven days a week to fix your heating system and deliver the professional and courteous service you expect from our family-owned and operated business. Aside from your system shutting down, several other signs that your HVAC system needs repairs include:
Ventilating or ventilation (the V in HVAC) is the process of exchanging or replacing air in any space to provide high indoor air quality which involves temperature control, oxygen replenishment, and removal of moisture, odors, smoke, heat, dust, airborne bacteria, carbon dioxide, and other gases. Ventilation removes unpleasant smells and excessive moisture, introduces outside air, keeps interior building air circulating, and prevents stagnation of the interior air.

This is a great option for cooling your home or business without having to deal with the ductwork.  Other systems require ductwork so that the cool air can travel throughout the space.  A ductless mini split air condition doesn’t require ductwork because it has an air conditioner or a heat pump outside that connects to units in the home that handle the cooling being pushed into them from outside.  You can control the temperature of a whole home or just one room by controlling the air handlers in each specific area.  This allows for more control and a more efficient way to control the temperature and cost of operating the ductless mini split air conditioner.
At Knoechel Heating Company, heating and cooling isn’t just our job, it’s our passion. We’re dedicated to providing you with the top HVAC service in Zelienople. No matter the time, day or the problem, you can count on us to get the job done right. After all, Knoechel Heating Company has been servicing the community since 1947, bringing comfort to our customers all year round.
A split system is a combination of an indoor air handling unit and an outdoor condensing unit. The indoor air handling unit contains a supply air fan and an air-to-refrigerant heat exchanger (or cooling coil), and the expansion device. The outdoor condensing unit consists of a compressor and a condenser coil. Split-systems are typically found in residential or small commercial buildings. These systems have the highest energy efficiency rating (EER) of all the available AC systems. Manufacturers are required to take the EER rating a step further and provide a seasonal energy efficiency rating (SEER) for use by consumers. SEER ratings vary widely and range from 10 to 20. The higher the SEER rating, the more efficient the AC system operates. If heating is required, an alternate method of heating the interior of the building must be used, usually in the form of electric or gas heating.
In order to make your everyday life easier and more enjoyable, Sky Heating & Air Conditioning specializes in state-of-the-art heating and cooling technology, partnering with Trane, Mitsubishi, and Waterfurnace.  We bring you HVAC solutions that represent the best the industry has to offer, ensuring long-term performance and satisfaction.  Whether you’re looking for the design/build of a new system, replacement, or hoping to cut costs and enhance convenience, we answer with proven products.  Our qualified HVAC technicians help you determine the ideal solution for your exact requirements, and make sure you’re happy with every step of the process.  From ductless HVAC to geothermal heating and cooling systems, we offer a wide selection of options and comprehensive services to answer any type of challenge.  Call on Sky Heating & Air Conditioning and let us exceed your expectations today!
Your comfort is a priority for us. A large part of comfortable living in Cary is not only having a functioning HVAC system, it’s also understanding who to call when you have a problem. If your air conditioner starts to fail in the middle of the Cary summer, you don’t have to stay at a friend’s for weeks on end. Or if your heater goes out during a blizzard, you don’t have to dig your heaviest blankets out of the basement. Instead, you can make an appointment with a member of our team and have him or her resolve your concerns. There is no problem in Cary you can encounter that we can’t work with you to solve. You can feel confident in knowing that you’re in qualified hands.
In addition, if water is condensed in the room, the amount of heat previously needed to evaporate that water also is re-released in the room (the latent heat of vaporization). The dehumidification process is the inverse of adding water to the room with an evaporative cooler, and instead releases heat. Therefore, an in-room dehumidifier always will warm the room and reduce the relative humidity indirectly, as well as reducing the humidity directly by condensing and removing water.

Furnace Circuit Board -- The furnace circuit board controls a variety of functions. It not only handles the regular operation of the furnace, it also monitors the furnace's various safety circuits. Over time, vibrations from the furnace can weaken solder point and cause them to separate. Dirt and debris can cause short-circuits that damage the board. Failure of the circuit board can cause a variety of effects ranging from the fan not turning on to the complete shutdown of the furnace.
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