Today: 19, October 2017

Most Frequently Asked Questions

Here are the answers to the most frequently asked questions.  If we do not address your questions here, please feel to email or call us at (808) 847-0851.


Definition of Terms


Annual Fuel Utilization Efficiency. A measure of a furnace's heating efficiency. The higher the AFUE percentage, the more efficient the product. The US government's established minimum AFUE rating for furnaces is 78%.

Air Handler
Also known as the "indoor unit", the air handler is the evaporator section of your air conditioning system. It circulates and delivers the cooled air. The indoor unit contains the evaporator coil, an indoor fan motor and, sometimes, a heat strip (for supplemental heating).

Automatic Setback Thermostat
An automatic setback thermostat or programmable thermostat allows you to store six or more separate temperature settings for different times of the day. You can set the thermostat with a daily or weekly program. And you can override the settings at any time without affecting the daily or weekly program.

BTU stands for British Thermal Unit: the amount of heat required to raise the temperature of one pound of water one degree fahrenheit.

The compressor is the "engine" which drives the condensing unit. The condensing unit serves as a pump which compresses the gas in the high pressure (condensing) side of the cooling cycle and causes the refrigerant (Freon) to circulate.

Condensing Unit
Also known as the "outdoor unit", the condensing unit pumps vaporized refrigerant from the air handler (indoor unit), compresses it, liquefies it, and returns it. It contains the compressor coil, an outdoor fan motor, refrigerant control valves, and other necessary controls.

Evaporator Coil
Found inside the air handler (indoor unit), the evaporator is where refrigerant vaporizes and absorbs heat.

Placed in Service
The IRS defines "placed in service" as when the property is ready and available for use. It's not when you purchase product, but the day installation is complete, and you are able to use your new product.
Principal Residencce
The tax credit for energy efficiency is available for improvements made to a home that you own and use as your "principal residence." This is the home where you live most of the time. A temporary absence due to special circumstances, such as illness, education, business, military service, or vacation will not change your principal residence.

The home must be in the United States. It can include a house, houseboat, mobile home, cooperative apartment, condominium, and a manufactured home.

Refrigerant is a substance which absorbs heat by changing states (evaporating) from liquid to gas. It releases heat by changing states (condensing) from gas back to liquid. Most people refer to the refrigerant used in cooling systems (R-22) as Freon. But this is actually DuPont's brand name for R-22. The scientific name for R-22 (or Freon) is halogenated chloroflourocarbon (CFC). Because of its destructive effect on the ozone, the use of R-22 is strictly regualted by the Environmental Protection Agency (EPA). To legally buy and use Freon, an air conditioning technician must own a recovery unit and must be certified EPA certified. Removing Freon without a recovery unit destroys ozone and is a violation of federal law.

Seasonal Energy Efficiency Ratio is the efficiency rating for air conditioning units. The higher the SEER rating, the better the energy efficiency. SEER is the ratio of the amount of BTU's used for cooling in normal annual use to the total amount of electrial power (measured in watts) over the same period. (Annual Cooling in BTU's/Total Watt Hours = SEER).

Split System
A split air conditioning system allows the air handler to be installed in a different location from the condenser. While split systems generally cost more to install than package units, they can save you money in the long run because they are more energy efficient. Another advantage is the reduction of condenser noise. Split systems are also often used where there is a space problem. Ask your American Air Conditioning LLC Hawaii technician if a split system is right for you.

A temperature-sensitive switch that controls your heating and cooling systems. When the indoor temperature drops below or rises above the selected temperature setting, the switch moves to the "on" position, and your heater or air conditioner runs to warm or cool.

Zoning Systems
A zoning system allows the home or business owner to control the environment in an individualized and energy efficient way. The residence or place of business can be divided into 2 or more zones. Through the use of fully modulating dampers, the system can selectively cool or heat certain portions of the building at given periods of the day. With some systems, indoor humidity can likewise be displayed and controlled. A popular alternative to zoning is having two or more units in a larger building. Each unit controls the temperature and humidity in a given portion of the building. Consult with an air conditioning design contractor, such as American Air conditioning LLC Hawaii, to determine which of these systems would best meet your needs.

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