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Typically a furnace life expectancy is between 15-20 years.
You are over that now at almost 23 years
Thought so. Can you give me an idea what we should look for as a replacement?
Weel, if you want to go with a comparable replacement, the Lennox ML180 would fit the bill. See here.
How do we decide if 150K Btu is properly sized for our house?
It sounds really high. Years ago furnaces were oversized and since then the thinking has changed. Now we are replacing many of the oversized units with a lower BTU rating with no issues. The best way is to have your contractor do what's called a heat loss calculation. This is done on software and takes into account windows, doors, insulation, climate, etc. Takes the guess work out of it.
Should we consider upgrading to a hi-efficiency unit? We will likely own this place for at least another 10 years before we down-size.
If you are only going to be in here 10 years, you may not get the full benefit of a higher eff unit. But, on the other hand, there are utility company rebates available which make upgrading more enticing.
I understand we may be required by our utility to upgrade in our area (Manitoba, Canada). Can you give me an idea what to expect as an istalled cost?
For mid efficiency or high efficiency?
I would say hi-eff.
These units sell for about $1800 wholesale and with markup, labor, and so forth, I would plan on around $4200-4800 installed. Of course this cost varies shop by shop and by location.
This is the Lennox EL296V unit
How about mid-eff?
Much less, perhaps $3200-3600
Ok, thanks for the advice - much appreciated.
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