If you need help with your air conditioner or want to learn more about the types of air conditioners available for your home comfort needs, explore HVAC.com’s HVAC Contractor Directory. Through the directory, you’ll be connected with local cooling contractors who can answer your questions and help you determine the best system and best value for your home. Just enter your ZIP code to see local HVAC contractors near you!
Air Blue Heating and Cooling Inc. protects your safety and investment with unwavering dedication.  We are available 24 hours a day, 365 days a year, for reliable Emergency Service, and as a local company we respond quickly to any crisis anywhere in Chicagoland and the surrounding suburbs, including Wheeling, Buffalo Grove, Northbrook, Deerfield, IL.  Our trucks are fully stocked with leading-edge diagnostic equipment, specialized tools, and genuine factory authorized parts to accurately identify and resolve even complex problems without delay.  We recognize the importance of a properly operating heating and cooling system to both your home and commercial facility, and never leave you waiting for a tardy technician or distant appointment time.  By offering same day service and installation, courteous customer service, and affordable pricing, we strive to make your life easier.
Be cautious with companies that offer “whole house air duct cleaning,” urges the NADCA. The company may be using unscrupulous tactics to upsell you once they get started. Before any work begins, always clarify in writing what the job entails and what the cost will be. To protect yourself against fraud, read customer reviews and verify that your HVAC cleaning service has applicable licenses and certifications.
When your furnace isn’t regularly serviced it can operate less efficiently. This increases your energy bills and also prevents your furnace from keeping your home as warm as you like. Keep your furnace properly maintained with regular service. The national average furnace service cost is between $60 and $80. Companies may offer tuneup specials that cover all the necessary testing, tightening, measuring and cleaning to keep your equipment running at top efficiency. If you have a newer system, furnace service costs may be covered by your warranty. Outside of warranty, a basic tuneup might start at $58 and a more advanced maintenance cleaning could be over $120. Here are some signs your furnace may need service:
Ventilation is the process of changing or replacing air in any space to control temperature or remove any combination of moisture, odors, smoke, heat, dust, airborne bacteria, or carbon dioxide, and to replenish oxygen. Ventilation includes both the exchange of air with the outside as well as circulation of air within the building. It is one of the most important factors for maintaining acceptable indoor air quality in buildings. Methods for ventilating a building may be divided into mechanical/forced and natural types.[16]
A dehumidifier is an air-conditioner-like device that controls the humidity of a room or building. It is often employed in basements which have a higher relative humidity because of their lower temperature (and propensity for damp floors and walls). In food retailing establishments, large open chiller cabinets are highly effective at dehumidifying the internal air. Conversely, a humidifier increases the humidity of a building.
Nytech Heating and Cooling has proudly served Castle Rock, and Douglas county customers for over 10 years. We are passionate about customer service and truly care about your family and your home. We don't believe in cutting corners to boost profits. We do what it takes to get the job done correctly. Douglas County is our Home and we genuinely care about our neighbors.

Check their background. Contractors who bid on your installation should show you verification of bonding and insurance, plus any required contractor’s licenses. Check with your local Better Business Bureau and consumer affairs office for complaint records. It’s a plus if technicians are certified by a trade organization, such as North American Technician Excellence or HVAC Excellence, to service residential heating and cooling equipment. Those and other similar programs assess the technician’s knowledge of specific types of equipment and their proper service methods.

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.
Whether you’re confronted with a minor maintenance issue, safety concern, or system failure, don’t hesitate to call 303-678-5576 for expert assistance. 24/7 Emergency Service allows you to get the help you need, whenever you need it. For all repairs, we prioritize your best interests, providing the information, cost-effective recommendations, and honest answers that add up to greater value for your investment. Our experienced HVAC specialists are familiar with all makes and models, and focus on repairs that enhance the reliability and performance of your equipment. When the job is complete, rest assured there will be no mess, damage, or discarded debris for you to deal with, and your furnace will be ready to meet demand. At Welzig Heating & Air, we build on a reputation for excellence each time we answer a call for repair across Boulder, Longmont, Louisville, Lafayette, CO & more.
This describes how much cooling the unit delivers for each watt of electricity. Efficiency is expressed as the seasonal energy-efficiency rating, or SEER. The minimum SEER for a split system central air conditioner allowed today is 14, so look for units with SEER ratings of 15 or greater. The higher the SEER, the more you can lower your energy costs.

R-22 Freon is being phased out & isn't readily available. So the service company may only purchase as needed and the lack of availability would make their cost high. But, as long as they can get it, whatever the cost, unfortunately, is less expensive than replacing the A/C. Which will be the case eventually since it's no longer manufactured or sooner as in my case with a not so old a/c that sprang a leak, that would have been just a repair, but since it uses R-22 the whole unit has to be upgraded(replaced).  
At A-PLUS Service Experts Heating & Air Conditioning, we are well accustomed 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 finished, it holds us to a higher standard, making certain that we continue to provide you with exceptional service without fail. When it’s time to address any heating and cooling question or concern you have, know that you can trust the experts at A-PLUS Service Experts Heating & Air Conditioning regardless of what the Waldorf weather tosses our way.
The liquid refrigerant is returned to another heat exchanger where it is allowed to evaporate, hence the heat exchanger is often called an evaporating coil or evaporator. As the liquid refrigerant evaporates it absorbs energy (heat) from the inside air, returns to the compressor, and repeats the cycle. In the process, heat is absorbed from indoors and transferred outdoors, resulting in cooling of the building.
"Jim did a great job. His price was $1300 cheaper on replacing both the attic and outside units (everything new). What I liked about him is that he was not pushing services. Although, he assessed and pointed it out everything that needed to be fixed, at the same time, he was sharing how I could do the work myself if I wanted to save the money. I really liked that. Final work was a Trane- 4 Ton, 14 Seer Heat-Pump System with 1year warranty on labor and the 10 year parts from the Trane. It works great so far. I had a 2.5 ton old ac that even when it worked well would take hours to cool down the house. No kidding, now it cools the house from 76 to 72 in 15 minutes. After using thumbtack for a while, I realized that there are good workers that will do the job for a lot cheaper. You just need to be patient and do the estimates with all the contractors that send you messages. Oh, and please, rely on the reviews. I would definably recommend 911 AC/services !!! Great job Jim!"
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.
A multi-split system[44] is a conventional split system, which is divided into two parts (evaporator and condenser) and allows cooling or heating of several rooms with one external unit. In the outdoor unit of this air conditioner there is a more powerful compressor, ports for connecting several traces and automation with locking valves for regulating the volume of refrigerant supplied to the indoor units located in the room.
Air conditioner equipment power in the U.S. is often described in terms of "tons of refrigeration", with each approximately equal to the cooling power of one short ton (2000 pounds or 907 kilograms) of ice melting in a 24-hour period. The value is defined as 12,000 BTU per hour, or 3517 watts.[32] Residential central air systems are usually from 1 to 5 tons (3.5 to 18 kW) in capacity.

Need 24-hour emergency furnace repair? We can provide that too. With our same-day service and live phone and online chat service available 24/7, we make your comfort our top priority. Heating and air conditioning should help you live a comfortable life, so let us help you make your home the most comfortable it has ever been. It’s easy, just grab your furnace repair coupon, then simply give us a call at 615-953-9885, chat or schedule an appointment with us online.


Hospital operating theatres, in which air is filtered to high levels to reduce infection risk and the humidity controlled to limit patient dehydration. Although temperatures are often in the comfort range, some specialist procedures, such as open heart surgery, require low temperatures (about 18 °C, 64 °F) and others, such as neonatal, relatively high temperatures (about 28 °C, 82 °F).

As a Bryant Factory Authorized Dealer, Cool Care Heating & Air installs durable, high-quality heating systems that will go the distance. Are you considering a heater installation or heating repair? If so, you have found the best HVAC dealer in the Columbia, SC area. We specialize in high-efficiency furnaces, heat pumps and boilers that can cut energy costs month after month.


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.
The use of CFC as a refrigerant was once common, including the refrigerants R-11 and R-12 (sold under the brand name Freon-12). Freon refrigerants were commonly used during the 20th century in air conditioners due to their superior stability and safety properties. When they are released accidentally or deliberately, these chlorine-bearing refrigerants eventually reach the upper atmosphere.[60] Once the refrigerant reaches the stratosphere, UV radiation from the Sun homolytically cleaves the chlorine-carbon bond, yielding a chlorine radical. These chlorine radicals catalyze the breakdown of ozone into diatomic oxygen, depleting the ozone layer that shields the Earth's surface from strong UV radiation. Each chlorine radical remains active as a catalyst until it binds with another radical, forming a stable molecule and quenching the chain reaction.
With colder weather on its way back to Nashville, furnace and heating repair may not be at the top of your to-do list, but maybe it should be. Sure, it’s easy for us to sit here and tell you to schedule annual furnace service, but it’s only because we want to help you avert a heating breakdown during the coldest day of the month in Nashville. Day or night, our HVAC professionals are here to make certain that you have a comfortable home, and can help get your furnace back running in little time.
Locally owned and family operated, M and M, Heating & Cooling, Plumbing & Electrical customizes solutions to perfectly fit your requirements and lifestyle. We specialize in a wide range of services including plumbing, water heating, indoor air quality, and residential and commercial temperature control. Our team of highly trained and certified technicians are fully licensed and insured, adhere to strict service procedures, and meet exacting standards of quality. Call on M and M, Heating & Cooling, Plumbing & Electrical at (720) 443-6119 for dedicated service throughout Longmont, CO & surrounding areas, and have confidence in a rewarding experience and long-term results. With over eighteen years of satisfied customers, we take great pride in a job done right.
To qualify as a Certified Daikin Comfort Pro Dealer, Green Valley Cooling & Heating maintains exceptionally high standards of business practices, technical expertise, and customer approval ratings.  Our loyal customers, amazing community of support, dedicated team members, and vendors have all contributed to celebrating 50 years in business, and we see it as a benchmark for future achievement. Rest assured, at Green Valley Cooling & Heating we continue find new ways to exceed your expectations.

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.
As a family owned and operated full-service HVAC provider in Erie, we recognize the concerns and challenges of keeping your home and family perfectly comfortable without breaking your budget.  At Nerthling's Heating and Air Conditioning, we go above and beyond to eliminate inconvenience, protect your investment, and find solutions you can easily afford.  To better serve your needs, we offer extended regular service hours from 8 to 6 PM Monday through Saturday, available throughout Erie County, including Millcreek, PA, Erie, PA & Fairview, PA.  In emergency situations, we are always available, twenty-four hours a day, seven days a week.  Know that when you call Nerthling's Heating and Air Conditioning, we are 100% committed to your satisfaction.  We treat your home like it’s our own.
Humidity is becoming more of a concern to building operators and owners. High indoor humidity leads to mold and mildew growth inside the building. The are several methods of controlling indoor humidity. The simplest (and most expensive) method is to connect a humidistat to an electric heater. When the humidity inside the building rises above the humidistat set point, the heater is turned on. The additional heat causes the air conditioning system to run longer and remove more moisture.
CIBSE publishes several guides to HVAC design relevant to the UK market, and also the Republic of Ireland, Australia, New Zealand and Hong Kong. These guides include various recommended design criteria and standards, some of which are cited within the UK building regulations, and therefore form a legislative requirement for major building services works. The main guides are:
Air Blue Heating and Cooling Inc. provides a full range of residential and commercial heating, cooling, and air quality services across Chicagoland and the surrounding suburbs.  With over thirty years of practical experience, we know exactly how to protect your comfort, wallet, and enjoyment of your indoor space.  As a Carrier Factory Authorized Dealer, we ensure top quality products and maximize performance through skilled services.  Our team is fully licensed, bonded, insured, and factory trained.  Every call is answered by a NATE-certified professional, who has verified technical excellence through strenuous, industry-recognized exams.
If you are using existing ducting, it will have to be inspected. Proper ducting loses around 2% to 5% of your energy. Old, leaking ducts can lose 50% or more. A contractor will need to have the ducts inspected and replace any parts ahead of time. If you are changing the size of your HVAC system because of significant changes to your home, you might need to replace the ductwork regardless.
"Jorge Mondragon did a fantastic job installing a new upstairs AC and furnace. His price was close to the best that I received, and after seeing the positive reviews on Thumbtack, I decided to give him the job. He came in with two other crewman and worked about a half day to get the job done. They used tarps on the floor and covered the entire section they walked on during the install, including the stairs. The new AC works great, although the real test will come when the brutal summer kicks in. I'll update my review once I have a few months on the unit. The install job looked thorough and well done. Professional, polite, well-spoken, and hardworking. This is my go-to company for all future HVAC needs and I'll be recommending him to everyone I know."
In the event of an emergency with your residential heating and cooling system, we understand that you simply cannot wait! At R.S. Andrews, we take your comfort and well-being seriously and are proud to offer our emergency HVAC repair at any hour, on any day—including weekends! We provide only the highest quality services to ensure your needs are met!
Keep your home comfortable all year round with Keep your home comfortable all year round with this high quality and efficient 14 SEER central heating and cooling heat pump system. This system is ideal for new or replacement residential or commercial applications and consists of the outdoor condenser indoor air handler with evaporator coil heat strip and 30 ...  More + Product Details Close

At the state level the rebates are still substantial. For example, switching to a zoned system can get you a $100 rebate from various A/C companies, and state rebates are also included. In Pennsylvania a high-efficiency air conditioner alone can get you up to $300, and a high-efficiency complete HVAC system can see up to $1000. Maryland's incentives get up to $1,250, with a $100 rebate on a tune up of an existing system.
Our fully trained and certified heating technicians have been repairing installing furnaces, heating systems and heat pumps in Smyrna and the Atlanta area since 1966.  We offer 24 hour emergency service for unexpected heating system break downs.  We can provide expert maintenance and repair on your current heating system or help you select a new, high-efficiency heating system from our wide range of furnaces.
Since 1971, One Hour Heating & Air Conditioning has been the leading Charlotte AC repair company. Our technicians are not only professional experts, but they work 24/7, 365 days a year to make sure you’re comfortable. Plus, they’re “Always on time… or you don’t pay a dime.” ®. If you are looking for heating and air in Charlotte NC, you are in the right place!

Air Handling Unit (AHU): a device used to condition and circulate air as part of a heating, ventilating, and air-conditioning (HVAC) system. An air handler is usually a large metal box containing a blower, heating or cooling elements, filter racks or chambers, sound attenuators, and dampers. Air handlers usually connect to a ductwork ventilation system that distributes the conditioned air through the building and returns it to the AHU.
Contact/Relay -- Relays are electronically controlled switches that activate the various components of your HVAC system. They manage everything from the power going to the motor to automatic dampers, humidifiers, etc. Most of them are controlled by the thermostat. The most common failure for a relay is being stuck in the "open" position. Separated from its assigned contact point, it fails to complete the connection and send the message to whatever it was supposed to operate. This failure usually occurs from use over time. Each time a relay connects and sends its signal, the electrical arcing from point to point eventually causes wear and tear.
Relax—ABC Plumbing, Heating, Cooling & Electric is here for you when you need us most! Our highly trained, background-checked technicians perform heating and air conditioning repairs quickly and efficiently to keep your family warm and cozy all winter long. With over 65 years of experience, you can trust that we’ll fix your furnace correctly the first time.

Hi John, Thanks for reaching out, we would be happy to help you connect with a pro for your project. You can submit a request to our pros here: www.homeadvisor.com, browse a list of pros that serve your area here: http://www.homeadvisor.com/c.html, or send your info to [email protected] and a project advisor will reach out to assist you. –HASupport
With flexible financing options from Wells Fargo Financial National Bank, with approved credit, you can enjoy many benefits. From convenient monthly payments to easy-to-use online account management, Wells Fargo financing offers top notch service and control over your finances. We know you want to stay comfort without breaking the bank, so we help you manage your expenses. Call us at 303-678-5576 to learn more!
Energy efficiency can be improved even more in central heating systems by introducing zoned heating. This allows a more granular application of heat, similar to non-central heating systems. Zones are controlled by multiple thermostats. In water heating systems the thermostats control zone valves, and in forced air systems they control zone dampers inside the vents which selectively block the flow of air. In this case, the control system is very critical to maintaining a proper temperature.
It's always changing: Some newer thermostats take advantage of wireless technology. You can adjust your thermostat remotely so that if you leave and forget to adjust it, or if you are going to be home later than you thought, you can adjust it via your smartphone. Some can even give you reports on how efficient your system is performing based on usage. These are very efficient models, but they are also very expensive with some costing over $250.00.
If your AC system is in need of replacement, the national average air conditioner installation costs range from $2,930 to $3,670. Costs can vary greatly depending on whether you are replacing a wall or window unit or a central air system. A central air system is connected to ductwork that runs throughout your house and pumps cooled air into your various rooms via vents and registers. A central air conditioning system is far more costly than wall or window units. Selecting a central AC system that has a high seasonal energy-efficiency ratio (SEER) will likely lower both your carbon footprint and your utility bill. The type of AC system you select, where you live in the country, and the regional costs of HVAC work, duct removal and replacement, and ductwork repairs that are needed are some of the main factors that affect the cost of new air conditioner installation. Here are some examples of average costs for installing forced-air systems.
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