Picking The Right Air Conditioning System For Your Home

Buyers Beware: Correctly Sized Air Conditioners Save Money!


When you buy a new air conditioning system to change your old one - or if a totally new system is being installed in your brand-new house - the installer has to understand how big or, more importantly, how little the system needs to be. In order to understand precisely how huge (or little) it must be, the professional needs to determine how much cooling and heating capacity it should need to keep the occupants comfortable. This is called the load of the house.

The load of the home is partially reliant upon the home's square video footage. Nevertheless, a true load calculation exceeds that. An accurate load determination includes building construction; orientation to the sun; 'R' value of the insulation; number, size, and positioning of spaces; number, size, and positioning of windows and doors; kinds of windows and doors (thermal effectiveness); number and plan of floorings; and the climate.

Residential load estimations utilize mathematical solutions that take all these variables into factor to consider. They have been computerized, so they're not as lengthy as they were in the past.

Determining the load using guidelines usually results in an over-sized heating and cooling system, resulting in an increased initial expense, increased regular monthly energy bills, increased maintenance, and reduced equipment life since the equipment cycles on and off too often.

Who Does the Load Calculation?
The specialist you opt to install your new system needs to have the ability to perform these estimations. You might ask him for this service. If here he does not want to do it, or states it isn't really needed, you may want to search for a different contractor. In some areas, the local utility will carry out a load computation - contact your regional utility.

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

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

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

We've all heard the saying, 'It's not the heat; it's the humidity.' A cooling system that is too big cools off the temperature extremely rapidly, but it does not run enough time to remove sufficient moisture or 'humidity' from the air. The outcome is you feel cool however clammy. Lots of people then reject the thermostat to make the air conditioner run longer, increasing the utility expense. Sometimes, the inadequate wetness elimination arising from over-sized cooling equipment can result in mold growth and other types of moisture-related damage.

A properly sized cooling system runs enough time to 'wring' wetness from the air. This enables you to be comfortable at a somewhat higher thermostat setting and allows you to conserve loan on your energy expense. It also takes care of the 'mugginess' without making you feel too cold.

Air conditioning systems are sized in 'tons,' which is a measure of the rate at which they provide cooling, not just how much they weigh. One lots of cooling amounts to 12,000 BTU/H follow the link (British Thermal Units per hour), the rate of cooling needed to freeze one ton of ice at 32F in one day.

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

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