This snippet has been derived from “The green house Creative Homeowner Green Remodeling Your start toward an Eco- friendly home” by “John D. Wagner”. The different types of AC units are the basic central AC, ductless, window unit, portable unit, hybrid, and geothermal. “Appliance Repair in Irving TX” educates you on its different types & uses.

Types of ac units

Central AC:

Central Ac systems consist of an outside unit with a compressor, condenser coil, and fan, and an interior evaporate coil installed in the supply duct of a warm- air furnace. Indoor heat is picked up and carried through pipes by a refrigerant to the condenser coil outside. Central air is expensive to install if your home lacks heating ducts but may still be cheaper (and quieter) than an array of room units. Modern, high- pressure lines can work with small-diameter hoses that are easy to install in existing spaces.

Types of AC - Cooling coils
Types of AC – Cooling coils

Window units:

 If you need to keep one room or area cool in the summertime, the easiest solution is to install a window unit. You don’t have to make a hole in your house or install extensive duct-work, and most units can be plugged in and working an hour after you open the box. The best location is a double- hung window with a wall outlet nearby. The weight of the unit is carried on the sill and held in position with brackets at a slight down-ward slope for proper drainage of condensation. Extensions on each side of the unit slide out to seal the opening.

Heat Pumps:

Heat pumps can heat and cool your home. They have an outdoor coil and compressor and an indoor coil and fan. (There is also self- contained through- the- wall units.) In hot weather, the heat pump acts like a conventional air conditioner. In cold weather, the cooling cycle of refrigerant is reversed to create a heat gain inside the house. But as the temperature outside drops, heat pumps lose efficiency, and an electric most economical in areas with roughly equal heating and cooling demand.

In- Wall Units:

 Individual room units can be installed through the wall to avoid blocking the view through a window or having to remove the unit when it’s cold. Like window units, in- wall units have two coils made of copper tubing and aluminum fins, one facing inside and one facing outside. These machines work like central systems, but all the components are built into one box. Most room units can be plugged into a standard 120- volt outlet, but some require 240 volts. You should be sure that the unit 120- volt outlet, but some requires 240 volts. You should be sure that the unit does not overload the circuit.


Evaporative chillers (sometimes called evaporative coolers) are typically used to cool the air in commercial buildings or large homes in the Southwest. Chiller units can deliver from 10 to 500 tons of cooling. Modern chillers with heat ex changers and high- efficiency motors can use as little energy as 0.5 kilowatt per ton of cooling. Chillers usually flow water through evaporator and condenser tubes surrounded by refrigerant. Hot refrigerant is then condensed back into liquid in a cooling tower.

Types of AC - Chillers
Types of AC – Chillers

Air Quality

Modern houses and apartments are built to be airtight for greater heating and cooling efficiency. They’re so air-tight, however, that new air circulates back into the house very slowly- it may take hours for the air in a new house to recycle itself. This creates not only stale air but a buildup of indoor pollutants. These pollutants include irritants, such as dust, smoke, mold spores, pollen, and animal dander– which not only bother your lungs but clog up heating and cooling systems, computers, and other electronic equipment- but also more serious environmental hazards, such as the out-gassing of formaldehyde from construction materials.

Several devices are available to clean the air of a tightly sealed house. Forced- air cooling and heating systems can have electronic filters installed right inside the H VAC ducts. If you don’t have these systems, buy a portable air cleaner with a HEAP filter. Developed by the U.S. Atomic Energy Commission to remove almost all airborne particles, HEPA (high- efficiency particle accumulator) filters are widely used in hospitals and labs where clean rooms are needed. A true HEPA filter removes 99.97 percent of particles as small as 0.3 micron. (A micron is one- millionth of a meter; the period at the end of this sentence is several hundred microns across.) An ultra HEPA, or ULPA, filter removes particles as small as 0.1 micron. HEPA filters need to be replaced periodically, typically every one to three years.

Continue reading on Refrigerator fast facts

Categories: AC