Picking The Right Air Conditioning System For Your Home

Buyers Beware: Correctly Sized Air Conditioners Save Money!


When you buy a new A/C system to replace your old one - or if an entirely new system is being set up in your brand-new home - the installer has to understand how big or, more notably, how small the unit should be. In order to know precisely how big (or small) it needs to be, the contractor needs to compute how much cooling and heating capacity it need to need to keep the occupants comfortable. This is called the load of the house.

The load of the house is partly dependent upon the house's square video. However, a true load computation surpasses that. A precise load determination consists of structure construction; orientation to the sun; 'R' worth of the insulation; number, size, and positioning of spaces; number, size, and positioning of doors and windows; types of windows and doors (thermal effectiveness); number and plan of floorings; and the environment.

Residential load estimations make use of mathematical formulas that take all these variables into consideration. They have been computerized, so they're not as time-consuming as they were in the past.

Identifying the load by utilizing rules of thumb generally results in an over-sized heating and cooling system, resulting in an increased initial cost, increased monthly utility costs, increased upkeep, and reduced devices life since the equipment cycles off and on too regularly.

Who Does the Load Calculation?
The specialist you decide to install your new system ought to be able to carry out these computations. You may ask him for this service. If he doesn't wish to do it, or states it isn't necessary, you might want to look for a check here various professional. In some locations, the local utility will carry out a load computation - consult your regional energy.

Why it's Important to Have the Right Sized System
Having the wrong-size heating-cooling system can lead to numerous problems. Over-sizing your cooling system is not a good thing. Without entering too much information, your cooling load includes 2 parts:

  • The temperature of the air, called the sensible load.

  • Wetness or 'humidity' in the air, called the latent load.

We've all heard the stating, 'It's not the heat; it's the humidity.' A cooling system that is too big cools off the temperature really quickly, however it does not run long enough to eliminate sufficient moisture or 'humidity' from the air. The outcome is you feel cool but clammy. Many individuals then reject the thermostat to make the check here air conditioning find out more system run longer, increasing the energy costs. Sometimes, the insufficient moisture elimination resulting from over-sized cooling devices can lead to mold development and other types of moisture-related damage.

A properly sized cooling system runs long enough to 'wring' moisture from the air. This allows you to be comfortable at a slightly greater thermostat setting and allows you to save cash on your energy costs. It also takes care of the 'mugginess' without making you feel too cold.

A/C systems are sized in 'heaps,' which is a measure of the rate at which they deliver cooling, not just how much they weigh. One lots of cooling amounts to 12,000 BTU/H (British Thermal Units per hour), the rate of cooling required to freeze one ton of ice at 32F in one day.

It is better to have a system that supplies a little less than the required tonnage of cooling, instead of a system that provides more than the needed tonnage of cooling.

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