December 02, 2016
Not all furnaces are created equal.
A furnace that’s too big for your home wastes energy and money. It also wears down system components faster. A furnace that’s too small leaves you feeling cold when you need heat the most.
So how do you know what size furnace is right for your home?
To find the right size, an HVAC contractor needs to perform a load calculation, which takes into account various factors to find the furnace size you need.
In this article, we’ll go into more detail about load calculations and the factors that determine furnace size.
The Air Conditioning Contractors of America (ACCA) sets guidelines for load calculations, which are compiled into a guide called Manual J. This is the national standard that HVAC techs use for residential heating and cooling repairs and installations.
These calculations are complicated, but at Plumbline Services, our heating experts are always precise in determining your home’s correct furnace size so that you stay warm, cut costs and conserve energy.
When computing a load calculation, a HVAC Design Specialist will visit your home to look at these factors:
They’ll also take a look at what materials were used to build your house. For example, a brick home is generally better insulated than a home with wood siding, which could lessen the need for a larger furnace. The landscape around the house (like trees and shrubbery) can also impact your home’s insulation, which in turn influences what size furnace you need.
Your HVAC contractor will also take into account furnace efficiency. If you buy a furnace with greater efficiency, it could be possible to use a smaller unit and receive the same amount of heat in your home.
You can tell a furnace’s efficiency through the AFUE (annual fuel utilization efficiency) percentage rating. You can think of the AFUE as the percentage of fuel that’s actually used to heat your home. The higher the percentage, the more efficient the furnace.
For your convenience, you can request an appointment in one of two ways: