Selecting 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 house - the installer has to know how big or, more notably, how small the unit needs to be. In order to know exactly how huge (or little) it must be, the contractor has to calculate just how much cooling and heating capability it must have to keep the residents comfy. This is called the load of the house.

The load of the home is partly reliant upon the house's square video. However, a real load estimation goes beyond that. An accurate load decision includes structure construction; orientation to the sun; 'R' value of the insulation; number, size, and positioning of rooms; number, size, and placement of doors and windows; types of doors and windows (thermal efficiency); number and arrangement of floors; and the environment.

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

Determining the load by using guidelines almost always results in an over-sized heating and cooling system, resulting in an increased initial expense, increased month-to-month energy costs, increased upkeep, and shortened equipment life because the devices cycles on and off too often.

Who Does the Load Calculation?
The professional you visit our blog choose to install your new system needs to be able to perform these calculations. You might ask him for this service. If he does not want to do it, or says it isn't really essential, you might want to try to find a various professional. In some areas, the regional utility will carry out a load computation - consult your local energy.

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

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

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

We've all heard the stating, 'It's not the heat; it's the humidity.' A cooling system that is too big cools down the temperature level really rapidly, however it does not run enough time to get find out more here rid of adequate wetness or 'humidity' from the air. The outcome is you feel cool but clammy. Many individuals then refuse the thermostat to make the A/C unit run longer, increasing the energy costs. In some cases, the insufficient moisture elimination arising from over-sized cooling equipment can lead to mold development and other kinds of moisture-related damage.

A correctly sized cooling system runs enough time to 'wring' moisture out of the air. more information This enables you to be comfortable at a somewhat higher thermostat setting and permits you to conserve loan on your energy bill. It also looks after the 'mugginess' without making you feel too cold.

Cooling systems are sized in 'loads,' 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 (British Thermal Units per hour), the rate of cooling needed to freeze one lots of ice at 32F in one day.

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

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