9/17/2009

HVAC System what exactly IS an HVAC air duct system?

What is HVAC?

Hvac – an acronym for Heating, Ventilation & Air- Conditioning

Heating and air-conditioning systems (including the air duct system) control the temperature, humidity, and the total air quality in residential, commercial, industrial, and other buildings. Heat pumps, which are similar to air conditioners but can be reversed providing both heating and cooling for a home. Heat pumps uses mechanical energy to pump heat “up the temperature scale” from a cooler region to a warmer one, and it does this by changing the pressure of a working fluid called a refrigerant. Heat pumps are more complex, and because they run in both summer and winter, they often require more maintenance and need to be replaced more frequently than traditional furnaces and air condition

Heat Pumps Fall Under Different Categories Such As:

* Air-Source Heat Pumps
* Ground Source (Geothermal)
* Water Source Heat Pumps

Who Install, Repairs and Maintains these Systems?

Individuals that specialize in heating, air-conditioning, and refrigeration, and they go by the terms technicians, mechanics and installers. They install, maintain, and repair systems. Heating, ventilation, air-conditioning, and refrigeration systems many times referred to as HVACR systems, these repair technicians may also be called HVACR technicians. Properly trained technicians repair, and maintain systems, but you will find that many have elected to specialize in installation, maintenance & repair, heating systems, refrigeration care, or air conditioning. Finding a technician who specializes is a brand or special equipment type is another great way to locate the right technician for the job. It always a good idea to find a technician that is familiar with our brand or type of system.

What Are the Component Units?
Heating, air-conditioning, heat pumps and refrigeration systems are a dizzying mix of many mechanical, electrical, and electronic components. These include components such as motors, compressors, pumps, fans, air ducts, pipes, thermostats, 4-way reversing valve, bi-directional expansion valve, thermal expansion valve
or " TEV ", air conditioner compressor ,condensing coil, air filters, refrigerants, room thermostat, electrical switches, fuses or circuit breakers, blower fan, numerous switches, and more


Air Conditions Systems how do they Work?

Air conditioning or heat pump compressor which compresses low pressure refrigerant gas into a higher pressure, higher temperature gas. Usually the compressor is in the outdoor portion of an air conditioning or heat pump system. The compressor is basically a high pressure pump driven by an electric motor
A condenser or condensing unit: typically a condensing coil inside which high temperature high pressure refrigerant gas flows, and over which a fan blows air to cool the refrigerant gas returning it back into a liquid state (this transfers heat from the refrigerant gas to the air being blown by the fan).

A metering device which dispenses liquid refrigerant into a evaporator coil.
The metering device may be basically a thin section of tubing (a capillary or "cap" tube) or it may be a bit more sophisticated thermostatic expansion valve (TEV ) which includes a temperature sensing control that can open and shut the device against refrigerant flow an evaporator coil or cooling coil: usually the cooling coil is a section of finned into which liquid refrigerant is metered and permitted to evaporate from liquid to gas state inside the coil.

An air handler and blower unit which provides a fan, that blows building air across or through the evaporator coil. The air handler blower fan unit moves building air across the evaporator coil surface in order to condition building air by cooling it (this removes moisture from the cooler air).A duct system which sends conditioned air from the air handler into the supply ducts, and which then takes air from the ducts and returns it to the cooling system air handler.

Controls and features , which include a room thermostat, electrical switches, fuses or circuit breakers, condensate handling system, and air, filters.


Many Air Duct Cleaning Services offer cut rate bargain pricing based on vacuuming the air conditioning air ducts only. For such a low price those service companies are not likely to clean or even inspect the other important components of your HVAC air duct system, such as condensers, drain tanks, other places where condensation can collect and create conditions conducive to mold formation.


Vacuum collection alone does not clean the HVAC system. Brushes, air whips, "skipper balls" and other tools that agitate contaminants and debris scrub the surfaces within the air duct system and propels contaminants and debris into the vacuum collection device(s).

Anti-microbial chemical sanitizers are applied to the interior surface of the air ducts to control microbial contamination...but...before sanitizers are used, the system should be thoroughly cleaned. All anti-microbial chemicals used must be EPA registered for use in HVAC systems.

The purpose of residential air duct cleaning is to remove these contaminants from a home's HVAC system to get the best indoor air quality.

4 comments:

  1. Gas Ducted Heating Repairs

    Just linked this article on my facebook account. it’s a very interesting article for all.

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  2. This comment has been removed by the author.

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  3. Air duct cleaning is an important part of home maintenance. A dirty air duct can lower the quality of the air in your house by promoting the circulation of allergens and bacteria in the air. I have one of my air cleaner business. It control the indoor air quality by reducing pollutants.

    Air Duct Cleaning

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  4. Eliminating contaminants from your ducts helps to ensure the best possible indoor air quality which can help to minimize reaction to environmental sensitivity, allergies and asthma.

    Vaughan Duct Cleaning

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