Improving a Suburban Furnace
SF20 in my case. It heats OK but it's just so **** noisy. Has anybody modified the furnace to install a quieter fan? Less of an amp draw would be nice too. We don't boondock enough to justif...
Forum Discussion
jodeb720 wrote:
Mcewena - I'm going out on a limb here and assume you're complaining about the noise the furnace makes - not the sounds that come from it. E.g. A squeaky motor or something like that.
Thanks for the constructive response.
Yes. To be honest it's been so long since I've run it (COVID etc) that I'd have difficulty describing the sound now but it's the sudden jet engine sound as it kicks on as opposed to any squeak so I assume it's combustion & air movement/pressure in the plenum.
I didn't suggest slowing down the fan, although if possible a larger fan could spin slower and produce the same volume. I was wondering if there was a replacement fan that drew less current and as a side benefit was quieter (better winding/bearings?). Thanks for the part #s Old-biscuit.
I considered baffling it with an office ceiling tile, there really isn't much room for anything thicker that would be both heat/sound tolerant (it's under the dinette bench) but it's hard to buy 1 ceiling tile and without blocking the air intake I wasn't sure that was going to be effective anyway.
The Winnebago plenum design doesn't look that efficient but by the time I fabricate an alternative I might be into the diesel heater price range.
