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QUESTION:What are some things that I should look for in a mobile home furnace. I kow
that there are several manufactures that offer these. What are the most
important features to look for.
ANSWER: You should check and see local service is available for warranty (and maybe
from more than one authorised service provider within driving distance of you).
My research has uncovered the following:
Coleman=Evcon Owned now by York.
Miller=Intertherm Owned by Nordyne
Others will argue with me, but I don't recommend going over the 85-87%
efficiency rating in ANY furnace. Gas furnaces' efficiency ratings pretty much
shake out like this:
Standard Unit (continuous pilot light) 75-77%
Add electronic Ignition: 80-82%
Add power flue damper: 83-87%
After this, you start adding complex heat exchangers with things like water
circulation and complex electronic controls. The cost goes up very steeply, as
does maintainence cost. My father-in law has a 93% efficient unit that cost
$1800. It ran 3 years and a thunderstorm took out a $400 controller board. My
83% furnace cost $600 and has run without a flaw (other than my chimney &
thermostat) for 7 years so far. I've probably used $200 more in fuel than I
would have with his high end unit.
I like the Nordyne products, but only from what I have read on the web and
seen by looking at the units.
If you have propane gas, you might consider upsizing (one size only - too
big is as bad as too small....) if it's an option. Propane delivers less heat
from the burner than Nautural gas (but burns longer so it's the same essential
amount of energy per "gallon").
From Consumer Reports, the best bit of info I found was the stuff about
perimeter heat - get it! Good air distribution can let you run cooler in winter
and warmer in summer but still be comfortble. The ducting system is of course
critical to the heat & cooling getting from the furnace to YOU. DO be sure the
crossover duct(s) [if a doublewide unit] are securely connected during
installation & that no duct leaks develop. In a skirted home this is even more
critical. ALso check your bottom board or plastic barrier sheet. Some
utility/cable TV installers & others cut gaping holes in the bottom board to
run wires & leave it open!
A lot of this stuff is outside the furnace, but all of this will make it
LOOK like the furnace is not up to par.
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