Selecting The Right A/C System For Your Home
Buyers Beware: Correctly Sized Air Conditioners Save Money!
When you buy a new A/C unit to replace your old one - or if an entirely new system is being installed in your new home - the installer needs to understand how huge or, more significantly, how small the system needs to be. In order to know exactly how huge (or small) it should be, the specialist needs to compute what does it cost? cooling and heating capacity it must need to keep the residents comfortable. This is called the load of the home.
The load of the house is partially reliant upon the home's square video. However, a real load computation goes beyond that. A precise load determination 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 windows and doors (thermal performance); number and plan of floors; and the climate.
Residential load estimations utilize mathematical formulas that take all these variables into factor to consider. They have actually been computerized, so they're not as lengthy as they were in the past.
Identifying the load using rules of thumb often causes an over-sized cooling and heating system, leading to an increased initial cost, increased monthly energy expenses, increased maintenance, and reduced equipment life since the devices cycles off and on too frequently.
Who Does the Load Calculation?
The professional you decide to install your brand-new system needs to have the ability to perform these calculations. You may ask him for this service. If he doesn't want to do it, or says it isn't needed, you might wish to search for a various specialist. In some locations, the regional energy will carry out a load estimation - talk to your regional energy.
Why it's Important to Have the Right Sized System
Having the wrong-size heating-cooling system can result in several problems. Over-sizing your cooling system is not an advantage. Without entering into too much detail, your cooling load includes 2 parts:
- The temperature level of the air, called the practical load.
- Moisture 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 huge cools down the temperature very rapidly, however it does not run long enough to remove enough wetness or 'humidity' from the air. The result is you feel cool but clammy. Many people then decline the thermostat to make the A/C run longer, increasing the energy bill. In many cases, the inadequate moisture elimination resulting from over-sized cooling equipment can cause mold growth and other kinds of moisture-related damage.
A correctly sized cooling system runs long enough to 'wring' wetness out of the air. This permits you to be comfortable at a somewhat higher thermostat setting and permits you to save cash on your utility bill. It also looks after the 'mugginess' without making you feel too cold.
Cooling systems are sized in 'lots,' which is a measure of the rate at which they provide cooling, not just how much they weigh. One lots of cooling is equal to 12,000 BTU/H (British Thermal Units per hour), the rate of cooling required to freeze one ton of ice at 32F in read it here one day.
It is much better to have a system that provides a little less than the needed tonnage of cooling, rather than a system that provides more than the needed tonnage of cooling.