Heater Blower

[Jim K in PA]

We had the same experience using our 1981/82 Duo-Therm furnace in the same temps. There was no condensation problem either.  The noise of the blower fan did keep waking me and Kim up, but not our daughter.

Ah, the peaceful, stress-free slumber of youth.  I wish I could remember how to do that . . .

Do you think the delay in volage would allow it to work properly?  Maybe it would since the sail switch is the last "control" that needs to be activated in order to fire the burner.  

I would make sure that only the blower motor side of the circuit was subject to the ramped voltage controller.  Everything else should work as normal.  My furnace does not light until a few seconds after the blower starts.

I was thinking of sticking that sound deadener material called "Dynamat" (another product is "FatMat") to the inside walls of the cabinet where the furnace is housed to see if that would help deaden/dampen the noise some.  I also thought about putting a pad of it down underneath the front frame of the furnace where it's screwed into the floor. Haven't done either yet though.

I would be somewhat concerned about putting anything close to the heat exchanger.  I am sure you could add sound deadener to the outside of the cabinet without causing any safety issues, but I am not sure it would help much.  Most of the noise comes from the front of our unit, and you cannot do much about that.  It is the sudden starting that wakes me up, not the stead state noise.  That dynamat stuff also gets pretty heavy, and I am trying not to bulk up my PUP.

BTW, furnace is mounted up above the floor about 8 inches.  I actually have a storage cabinet under the furnace.

I also want to relocate and upgrade that thermostat.  What a dumb place to put it.

[JimQPublic]

Follow on to the blower issue-

I've noticed that ours is MUCH quieter off battery vs. shore power- the difference from the 13.4 volt converter to 12.5ish from the battery reduces the noise a lot.  I have been known to unplug at night.

[austinado16]

Mine does the same thing with delaying the burner until the blower is up to speed.  I've got about 5" of space round mine and just put in 2 layers of Reflectix around the inside of the cabinet in an upside down "U" shape.  It still needs to suck in return air for the blower, so there has to be a space completely around the body of the furnace for that to happen (it has a seperate outside air intake for the burner chamber, driven by a second fan).  So there is room to put 1 layer of Dynamat right onto the cabinet wood, with the Reflectix over the top as heat insulation.

I'm just looking to change the tone some.  Anything would help. Too bad a 4" square ball bearing'd computer case fan couldn't be swapped in.