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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]
As a Carrier Factory Authorized Dealer, M and M, Heating & Cooling, Plumbing & Electrical is qualified to properly size and install the most technologically advanced and well-regarded heating, cooling, and air quality products on the market today. Our team is NATE-certified, factory trained, EPA certified, and regularly updated, ensuring the right solution to any challenge.
The HVAC industry is a worldwide enterprise, with roles including operation and maintenance, system design and construction, equipment manufacturing and sales, and in education and research. The HVAC industry was historically regulated by the manufacturers of HVAC equipment, but regulating and standards organizations such as HARDI, ASHRAE, SMACNA, ACCA, Uniform Mechanical Code, International Mechanical Code, and AMCA have been established to support the industry and encourage high standards and achievement.

Moisture around or near your system—It’s possible that water pools next to your AC unit may just be caused by a blocked drain tube. A refrigerant leak, however, could be the reason for the excessive moisture, and leaking refrigerant can cause harm to the unit, humans, and the environment. Only technicians that provide the best air conditioner repair Phoenix has to offer are qualified to deal with refrigerant leaks.


Many heating and air conditioning companies are only interested in selling you equipment and service agreements. We’re interested in doing what’s best for our customers and in building and maintaining life-long relationships. With more than 55 years of service to the Tulsa, Oklahoma area, you can rest assured that our reputation and longevity speak for itself. We are easy to do business with!
Finally, don't underestimate the thermostat as a potential reason why your furnace is not working. Everything on the heating unit itself may function perfectly, but your home still will not heat right if the console you use to set the temperature doesn't communicate your input. A faulty thermostat can either be due to the wall unit itself, or the wiring that connects it to your furnace. Average thermostat repair costs are between $108 and $282, including labor. Replacement costs, of course, depend on the thermostat you choose. Visit our thermostat repair cost guide to learn more about this type of issue.
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.

At Horizon Services, we strive to provide all of our customers with the peace of mind that comes from knowing that you have a skilled team on-call for any AC emergencies that may arise. We have more than 300 fully stocked trucks ready to go at a moment's notice. Our Horizon technicians undergo rigorous training, including a mandatory 150 hours of training every year, to ensure that they're always up to date on the latest techniques and HVAC technology. Plus, we perform extensive background checks, including drug and criminal checks, on all of our employees so you don't have to worry about letting a stranger into your home when your AC breaks down in the middle of the night. When you're dealing with an air conditioning emergency, trust the experts at Horizon Services!

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