Designed to improve manufacturing process control in a printing plant, Carrier's invention controlled not only temperature but also humidity. Carrier used his knowledge of the heating of objects with steam and reversed the process. Instead of sending air through hot coils, he sent it through cold coils (filled with cold water). The air was cooled, and thereby the amount of moisture in the air could be controlled, which in turn made the humidity in the room controllable. The controlled temperature and humidity helped maintain consistent paper dimensions and ink alignment. Later, Carrier's technology was applied to increase productivity in the workplace, and The Carrier Air Conditioning Company of America was formed to meet rising demand. Over time, air conditioning came to be used to improve comfort in homes and automobiles as well. Residential sales expanded dramatically in the 1950s.[citation needed]
At Gainesville Mechanical, Inc., we’ve been in the business of providing the most reliable 24-hour AC repair service throughout Gainesville, Lawrenceville, Buford, Dahlonega, Braselton & Cumming, GA, since 1977. Because of our years of unending quality AC unit repair service, we know exactly what our customers expect, and what they deserve. We’ve made it incumbent upon our technicians to always provide prompt, thoughtful service while following the strictest ethical standards in the industry. It’s our commitment to providing excellent residential and commercial AC repair that allows us to back up our work with a 100% Satisfaction Guarantee. Whether you require our services as a Bryant Factory Authorized Dealer, or as the providers of the finest 24-hour air-conditioning repair services in the country, you can relax in knowing that we’ll never deliver anything less than the very best AC unit repair at an AC repair cost that is always reasonable and fair.

1) Change your filter. The simplest and most effective way to keep your AC running smoothly is changing your filter once a month. By regularly changing your filter, you reduce a lot of the burden on your system. A dirty or clogged filter makes your air conditioner work much harder than does a clean filter. Changing your filters regularly is easy on your budget and easy on your system as well. It will lower your utility bill and extend the life of your AC.


Air conditioning makes deep plan buildings feasible, for otherwise they would have to be built narrower or with light wells so that inner spaces received sufficient outdoor air via natural ventilation. Air conditioning also allows buildings to be taller, since wind speed increases significantly with altitude making natural ventilation impractical for very tall buildings.[citation needed] Comfort applications are quite different for various building types and may be categorized as:
Heaters exist for various types of fuel, including solid fuels, liquids, and gases. Another type of heat source is electricity, normally heating ribbons composed of high resistance wire (see Nichrome). This principle is also used for baseboard heaters and portable heaters. Electrical heaters are often used as backup or supplemental heat for heat pump systems.
If your air conditioning is blowing warm air—or not working at all—it's time to call in the experts. After all, we're not just talking about an uncomfortable afternoon on a hot day: we're talking about your happiness at home, and a problem that may cause extensive damage to your system if not addressed quickly. That's why it's smart to catch problems early before they become expensive to address.
A lot of heat enters the home through windows, especially open windows. If you really want to control heat in your house, pay attention to your windows, too. Keep them closed and covered with blinds or drapes during the hottest parts of the day—especially windows that are currently facing the sun. Here are more tips for cutting cooling costs this season.

Terrible - Explained to tech that we had cold air on heat status. I placed Thermostat on emergency heat and was able to get some heat. I told him TXU had installed a a new thermostat and I think he may have installed it incorrectly but wasn't, sure. He said it would cost us more money if he fixed problem if there was one. He said I could pay for it and get reimbursed from insurance company. When he said it would cost us money I said I would live with it. I plan on calling a reputable repair company. He did not check furnace or temperature of house


Poorly maintained water cooling towers can promote the growth and spread of microorganisms,[56] such as Legionella pneumophila, the infectious agent responsible for Legionnaires' disease, or thermophilic actinomycetes. As long as the cooling tower is kept clean (usually by means of a chlorine treatment), these health hazards can be avoided or reduced. Excessive air conditioning can have a negative effect on skin, causing it to dry out, and can also cause dehydration.[citation needed]
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.[51] 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%).[52] 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.[53] In another southern European country, Malta, it is estimated that around 55% of households have an air conditioner installed.[54] In India AC sales have dropped by 40%[clarification needed] due to higher costs and stricter energy efficiency regulations.[55]
Air changes per hour Bake-out Building envelope Convection Dilution Domestic energy consumption Enthalpy Fluid dynamics Gas compressor Heat pump and refrigeration cycle Heat transfer Humidity Infiltration Latent heat Noise control Outgassing Particulates Psychrometrics Sensible heat Stack effect Thermal comfort Thermal destratification Thermal mass Thermodynamics Vapour pressure of water
Although HVAC is executed in individual buildings or other enclosed spaces (like NORAD's underground headquarters), the equipment involved is in some cases an extension of a larger district heating (DH) or district cooling (DC) network, or a combined DHC network. In such cases, the operating and maintenance aspects are simplified and metering becomes necessary to bill for the energy that is consumed, and in some cases energy that is returned to the larger system. For example, at a given time one building may be utilizing chilled water for air conditioning and the warm water it returns may be used in another building for heating, or for the overall heating-portion of the DHC network (likely with energy added to boost the temperature).[4][5][6]
The cost to replace your gas furnace will vary based on the type and size of furnace you select, labor and installation costs, and any repairs your HVAC system may need. Nationally, average HVAC prices for a heating specialist range between $1,800 and $2,500. It’s important to select the right size gas furnace for your heating needs. A furnace that’s too small won’t heat your house properly, while a furnace that’s too large will run inefficiently, cycling on and off and likely breaking down sooner. HVAC specialists calculate your exact heat needs by measuring your home and incorporating variables such as the regional climate and your home’s level of insulation. Retail pricing for gas furnaces can range from $650 up to $3,000 and more. The higher the AFUE (annual fuel utilization efficiency) rating of the furnace, the more efficient it is at turning fuel into heat and the lower your carbon footprint and utility bill will be. HVAC installation costs are often based on an hourly rate and can range from under $50 to over $100 per hour, depending on the company and the furnace being installed. Higher-end furnaces cost more to install because they require added labor and expertise. For a typical installation, it might take two HVAC installation pros one day or less to remove your old furnace and replace it with a new one.

We relocate frequently and one of the biggest hassles of relocating to new areas is finding reputable companies that send qualified technicians to perform work when you need it, whether for annual preventative maintenance or during a house emergency. We’ve been through the process several times and always dread researching and trying new companies. This was our first HVAC call here in northern Virginia. We are in new construction and chose not to use the builder’s sub-contractor for a technician call but looked through Carrier’s website for a local business. Jeremy Garner with HVAC Unlimited responded to our service request the morning following our call. I shadowed him performing work and he was patient while I peppered him with questions. He helped expand my HVAC knowledge in order to be a better property owner of our systems. He performed the work we thought was necessary, in a timely and professional manner, and gave us options for future annual maintenance. HVAC Unlimited is definitely on our list of go-to contractors.

In 1906, Stuart W. Cramer of Charlotte was exploring ways to add moisture to the air in his textile mill. Cramer coined the term "air conditioning", using it in a patent claim he filed that year as an analogue to "water conditioning", then a well-known process for making textiles easier to process. He combined moisture with ventilation to "condition" and change the air in the factories, controlling the humidity so necessary in textile plants. Willis Carrier adopted the term and incorporated it into the name of his company.[10]
As touched on by their name, heat pumps function by transferring heat energy indoors during the winter and outdoors from your home during the summer. They're often attached to air conditioning units, using the surrounding air to transfer energy. However, geothermal heat pumps and water source heat pumps are also available. The cost to repair a heat pump, again, depends on the specific problem. Replacing a faulty thermostat may cost up to $300 including labor, while a worn or damaged defrost control board can set you back up to $600. For more details on your potential repair costs using this heating source, visit our heat pump repair cost guide.
Heaters exist for various types of fuel, including solid fuels, liquids, and gases. Another type of heat source is electricity, normally heating ribbons composed of high resistance wire (see Nichrome). This principle is also used for baseboard heaters and portable heaters. Electrical heaters are often used as backup or supplemental heat for heat pump systems.

Gainesville Mechanical Inc is open for regular business hours, Monday through Friday, from 8 a.m. to 5 p.m. We offer everyday extended business hours, at regular rates, to meet the challenge of your busy schedule with flexible appointment times, and always have a licensed technician at your door within 24 hours.  For desperate times, we protect your home, comfort, and safety with 24/7 Emergency Assistance without added after-hour costs.  Contact us at 770-532-9130, and rest assured, we prioritize your best interests.  Our skilled service never comes with inflated or hidden charges.  We provide affordable rates, upfront pricing, and the detailed information you need to make the best possible decisions.  We service all makes and models of cooling equipment, optimizing safety, efficiency, and reliability, to deliver superior, ongoing performance.  Trust our award-winning team of NATE-certified technicians to restore your comfort today, with repairs that ensure long-term satisfaction.
Our furnace quit lighting yesterday. I called Cool Tech around 7pm and they offered to come out after hours, but I chose to set up an appointment today. The technician John called me at 7:30am and was there about 8am as promised. He was very courteous and replaced the igniter quickly. The heater is back to working properly. This is my second time hiring Cool Tech and they will continue to be my go-to heating and air conditioning guys.
Your furnace's flame sensor is essentially a safety mechanism. As a thin metallic rod in front of the flame inside the unit, it's sole purpose is to confirm that your gas valves only open when a flame actually exists to burn that gas. When the flame sensor stop working, on the other hand, gas leaks can occur. To repair your furnace's flame sensor, expect to spend between $80 and $250. Even a full replacement of this part typically does not go above that range.

We happily offer all of our services in St Marys county. We view our neighbors in St. Mary’s county as important and valuable as our friends in Calvert. If you live in St Marys and you’re not sure if we can help you with your specific problem, please don’t hesitate to contact us and find out! We value all inquiries and our eager to help and assist our neighbors throughout all of Southern Maryland.

Kabran Air Conditioning & Heating is the first choice for heating and air conditioning on the Florida Space Coast! In addition to providing exceptional HVAC service, repair and installation, we also offer great deals and savings for our customers across Cocoa Beach FL, Satellite Beach FL, Cape Canaveral FL, Rockledge FL, Melbourne FL, Merritt Island FL, Viera FL, Indian Harbour Beach FL. Join our Cool Club to enjoy exclusive, member-only offers. Visit our special offers page today to see what we’re currently offering, and contact Kabran Air Conditioning & Heating for affordable heating and AC service in Cocoa Beach.


If you already have a newer condenser, the worst noise is probably coming from the compressor. (Fans on newer units are very quiet.) Contact the manufacturer to find a sound blanket for your model or buy a universal blanket (search online for “compressor sound blanket”). Installation is easy. Don’t bother putting a blanket on an old unit—you’ll still hear the noisy fan. Here are other possible solutions for a noisy air conditioner.
We contacted GatorAC and have been pleased through the entire process of the purchase, installation and the daily functioning of the unit. We spoke to Angie to get information about the Trane AC. She arranged for Carlos Garcia to come to the house to determine the unit that would fit our needs. We made the choice between 3 units on Thursday and the unit was installed Friday. The Installation team, Willie Shaw and Gary Barber were the best. When they left everything was done, clean and clear and working great. We would recommend GatorAC for your AC needs.

Consequently, this water must exit the air handler—typically through plastic pipe or a drain tube. That drain tube goes directly outside, often terminating near the compressor, or to a floor drain or to a small electric “condensate pump” located by the air handler. Where a condensate pump is used, it connects to a 1/2-inch vinyl or rubber tube that exits outdoors or to a drain.


Replacing a capacitor is easy. Just take a photo of the wires before disconnecting anything (you may need a reference later on). Then discharge the stored energy in the old capacitor (Photo 4). Use needle-nose pliers to pluck one wire at a time from the old capacitor and snap it onto the corresponding tab of the new capacitor. The female crimp connectors should snap tightly onto the capacitor tabs. Wiggle each connector to see if it’s tight. If it’s not, remove the connector and bend the rounded edges of it so it makes a tighter fit on the tab. When you’ve swapped all the wires, secure the new capacitor (Photo 5).
×