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Old 01-08-2013, 10:46 AM   #1
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Temp differences in rooms


New home in NE Pa. HP with propane back-up. Measured the outputs from my vents using an infrared gun while running gas. Some vents have 110 deg. readings while others are 95 deg. Also, two vents in room above garage. Vent closest to the main structure as well as furnace shows 108 while vent furthest out reads 94.

Are thes variances acceptable? Home has 6 in walls along with 6 in insulation.

Are these variances acceptable?

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Old 01-08-2013, 11:03 AM   #2
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Temp differences in rooms


I'd check for any possible leaks in the ductwork. Usually I'll see a single degree , possibly two in difference, culprit being longer ducts meaning the further the air has to travel the more it will cool down but 10 degrees difference is highly unusual.

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Old 01-08-2013, 06:34 PM   #3
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Temp differences in rooms


I'd take those temps again with the heat off and the summer fan on. If the temp differences are the same, then you have some serious building envelope/insulation flaws.
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Old 01-08-2013, 06:57 PM   #4
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Temp differences in rooms


Use a real thermometer. IR Guns can be way off. especially if your talking about those cheap things. My first IR camera cost 33K whats that tell you?
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