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Question DetailsAsked on 3/6/2014

Can someone who owns a 2 stage variable speed furnace give me their experience with its performance and durability.

I am in the process of purchasing a 2 stage furnace but not sure of the dependability of a variable stage blower motor. I would like to hear from people who actually have one.

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As an Air Conditioning Contractor in Florida ,we have sold thousands of systems with ECM Variable Speed Motors since the late 1990's.


In the early years there were more, but not excessive failures, or it seemed that way. Many improvements have been made to the electronics involved. Improvements had to do with handling "bad" power, to lightning spikes in voltage.


In fact the "motor" is very dependable, the electronic control portion is usually the issue, and most can be replaced separately.


I wouldn't hesitate to go with variable speed, as I have in our home for many years. Registered warranties are mostly 10 years on the parts, and you may be able to buy a labor warranty as well.


The facts are , today's cost of many parts ( not just variable speed motor parts) have increased to the point that after the ten years warranty, many parts along with the labor , can cost 40 to 70% of a replacement system. So much like other things in your home ( appliances,TVs,etc), when it gets older you will just replace it.


One thing to keep in mind is that a true variable speed ECM motor will deliver the exact air flow required, even as the filters and coil get dirty, standard motors can't do this. This , within reason, delivers lower cost operation and greater comfort in your home.


Source: www.bayareacool.com

Answered 5 years ago by BayAreaAC




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