Air Conditioners
Heat Pumps
Air Filtration Systems
Furnaces & Heaters
Air Handlers
Split Systems
Package Units
Ductless Mini-Split Systems
Maintenance & System Repair
Air Conditioning Additions
System Engineering
Swamp Coolers
Evaporative Coolers








North American Technical Excellence (N.A.T.E.) Technicians

TRS Air Conditioning Services & Construction, Inc. proudly employs North American Technical Excellence (N.A.T.E.) Technicians. What does that mean to you, the customer? It means that the technician working in your home has completed exhaustive training and testing and has the highest level of heating, cooling and ventilation certification available in North America. They are educated to solve almost every problem you can imagine, and for you that means peace of mind knowing that a TRUE professional is solving your problems with integrity and expertise.

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Air Conditioning Terms
HVAC (heating, ventilation, and air conditioning) is a major sub discipline of mechanical engineering. The goal of HVAC design is to balance indoor environmental comfort with other factors such as installation cost, ease of maintenance, and energy efficiency. The discipline of HVAC includes a large number of specialized terms and acronyms, many of which are summarized in this glossary.
Air handler, or air handling unit (AHU)
Central unit consisting of a blower, heating and cooling elements, filter racks or chamber, dampers, Central unit consisting of a blower, heating and cooling elements, filter racks or chamber, dampers, humidifier, and other central equipment in direct contact with the airflow.  This does not include the ductwork through the building.  The indoor part of an air conditioner or heat pump that moves cooled or heated air throughout the ductwork of your home.  An air handler is usually a furnace or a blower coil.
Microscopic living organisms suspended in the air that grow and multiply in warm, humid places.
British thermal unit (BTU)
Any of several units of energy (heat) in the HVAC industry, each slightly more than 1 kJ. One BTU is the energy required to raise one pound of water one degree Fahrenheit, but the many different types of BTU are based on different interpretations of this “definition”. In the United States the power of HVAC systems (the rate of cooling and dehumidifying or heating) is sometimes expressed in BTU/hour instead of watts.
Cental Air Conditioning System
System in which air is treated at a central location and distributed to and from rooms by one or m ore fans and a series of ducts.
Stands for Cubic Feet per Minute. This measurement indicates how many cubic feet of air pass by a stationary point in one minute.  The higher the number, the more air is being moved through the ductwork by the system.
Equipment that performs heat transfer when mounted inside an Air Handling unit or ductwork. It is heated or cooled by electrical means or by circulating liquid or steam within it. Air flowing across it is heated or cooled.
Condenser Coil
The outdoor portion of an air conditioner or heatpump that either releases or collects heat, depending on the time of the year.
Electronic Air Filter
An electronic device that filters out large particles and bioaerosols in indoor air.
Fan-coil unit (FCU)
A small terminal unit that is often composed of only a blower and a heating and/or cooling coil (heat exchanger), as is often used in hotels, condominiums, or apartments. One type of fan coil unit is a unit ventilator.
A component in the basic refrigeration cycle that ejects or removes heat from the system. The condenser is the hot side of an air conditioner or heat pump. Condensers are heat exchangers, and can transfer heat to air or to an intermediate fluid (such as water or an aqueous solution of ethylene glycol) to carry heat to a distant sink, such as ground (earth sink), a body of water, or air (as with cooling towers).
A plate or gate placed in a duct to control air flow by introducing a constriction in the duct.
The part of the air conditioner or heat pump that is located inside the air handler or attached to the furnace.  A component in the basic refrigeration cycle that absorbs or adds heat to the system. Evaporators can be used to absorb heat from air (by reducing temperature and by removing water) or from a liquid. The evaporator is the cold side of an air conditioner or heat pump.
A component of an HVAC system that adds heat to air or an intermediate fluid by burning fuel (natural gas, oil, propane, butane, or other flammable substances) in a heat exchanger.
A facing across a duct opening, usually rectangular is shape, containing multiple parallel slots through which air may be delivered or withdrawn from a ventilated space.
Heat Exchanger
Located in the furnace, the heat exchanger transfers heat to the surrounding air, which is then pumped throughout the home.
Heat Pump
A heat pump is an HVAC unit that heats or cools by moving heat.  During the winter, a heat pump draws heat from outdoor air and circulates it through your home’s air ducts.  In the summer, it reverses the process and removes heat from your house and releases it outdoors.
Blades, sometimes adjustable, placed in ducts or duct entries to control the volume of air flow. The term may also refer to blades in a rectangular frame placed in doors or walls to permit the movement of air.
Packaged terminal air conditioner (PTAC)
An air conditioner and heater combined into a single, electrically-powered unit, typically installed through a wall and often found in hotels. It is a window unit.
R-410A Refrigerant
A chlorine free refrigerant that meets the EPA’s newest, most stringent environmental guidelines.
A chemical that produces a cooling effect while expanding or vaporizing.  Most residential air conditioning units contain the standard R-22 refrigerant, or Freon.
Roof-top unit (RTU)
An air-handling unit, defined as either "recirculating" or "once-through" design, made specifically for outdoor installation. They most often include, internally, their own heating and cooling devices. RTUs are very common in some regions, particularly in single-story commercial buildings.
Scroll Compressor
A specifically designed compressor that works in a circular motion, as opposed to up-and-down piston action.
The Seasonal Energy Efficiency Ratio is an energy efficiency rating for air conditioners.  The higher the SEER, the better the energy performance, the more you save.  The DOE’s established minimum SEER rating for cooling is 13.00.
Split System
An HVAC system in which some components are located inside the structure of the house and some are located outside.  Split systems should be matched for optimal efficiency.
Two-Stage Operation
Provides two levels of heating or cooling output for greater temperature control, energy efficiency, and improved indoor air quality.
A method of partitioning a home into independently contolled comfort zones for enhanced comfort and efficiency.


Contact Us

TRS A/C Services and Construction, Inc.
5645 S. Country Club Road
Tucson, AZ 85706

Telephone: (520) 620-6590




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... and most other brands


ROC #'s 164788, 164789, 164790, & 164791