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Old 09-18-2009, 04:29 PM   #1
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Lear Siegler Wall Heater back clearance


HVAC Experts,
I have a Lear Siegler G350SW80 wall heater in a duplex i recently bought. The unit sits in a 2x4 wall, but it appears that someone had cut (hacked) away the sheetrock/plaster on the non-heat side. Does anyone know if the clearance requirements for these old heaters and if it is possible to sheetrock the back?
Thanks!

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Old 09-18-2009, 08:22 PM   #2
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Lear Siegler Wall Heater back clearance


You might check out the clearances from a Williams Wall Furnace site. They are a competitor, but their clearances are likely the same. At least you have a reference. Good luck

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Old 09-18-2009, 09:03 PM   #3
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Lear Siegler Wall Heater back clearance


Hey Flashheatingand,
thanks for the insight...here is the URL for others who may have the same question http://www.wfc-fc.com/pdf/Monterey_T...t_Brochure.pdf

bottom line is that it looks like i can hang sheetrock on the backside.
Thanks!
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Old 09-19-2009, 03:36 PM   #4
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Lear Siegler Wall Heater back clearance


The drywall was probably removed in hopes of getting heat from the backside of the furnace.
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Old 09-19-2009, 04:22 PM   #5
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Lear Siegler Wall Heater back clearance


Gypsum, being inorganic, does not burn.

Paper yellows at 150C.
http://www.tcforensic.com.au/docs/article10.html

How long can you touch the backside of your heater after it's been on for a while?

no burn ever at 42C(108F)
burned in 30 sec at 54C(129F)
5 sec at 60C(140F)
1 sec at 71C(160F)

Last edited by Yoyizit; 09-19-2009 at 04:27 PM.
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