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Do you need a new furnace?

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Home Inspector with Pillar To Post Home Inspection

Do you need a new furnace?

For many homeown­ers, heating costs are a major expense throughout the cold weather months. No matter what you do to reduce those costs, if you have an inefficient furnace, your energy bills are going to be higher than necessary. But before you decide to replace an older unit, it's important to consider the options and what is most appropriate for your residence.
                                     
Furnace types
There are three types of fur­naces: conventional, mid-effi­ciency and high-efficiency. The dif­ferences among the three furnaces are measured by how much generated heat stays in a house. A mid-­efficiency furnace has an effi­ciency of 80 to 89 percent. A high-efficiency furnace has an effi­ciency of 90 percent or higher.
 
Although conventional furnaces are no longer being made, many older homes still use them. Yet many homeowners are choosing to replace older furnaces simply because they are not energy-effi­cient (efficiency ratings average about 60 percent). For example, a standing pilot light burns gas even when the furnace is not running, even during the summer.
  
Energy efficiency
If energy efficiency is your No. 1 priority, then a high-efficiency furnace is what you want in your home, as it provides more heat for your heating dollar. However, high-efficiency furnaces are more expensive to buy and more expen­sive to maintain and repair. On the other hand, a mid-efficiency furnace can only extract so much energy, but this limitation might not be a big concern in a smaller home. 
 
In a tight, well-insulated home or in mild climates, there is little benefit in spending the extra money for a high-efficiency fur­nace since the energy savings is only about $50 per year.  In the long term, the high-efficiency furnace may not save a client much money when considering the initial investment and the small reduction in energy costs.

Comments (2)

Brian Belcher
RE/MAX Executive - Charlotte, NC
Charlotte Realtor

Hey, great post.  Thanks for the analysis.  It's all about the application.

Nov 17, 2008 01:54 PM
Tom Braatz Waukesha County Real Estate 262-377-1459
Coldwell Banker - Oconomowoc, WI
Waukesha County Realtor Real Estate agent. SOLD!

John Rocco

Good advice and excellent blog about furnaces and suggestions

Feb 11, 2015 08:25 AM