Duct Work Issue

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Anonymous Poster #1	Duct Work Issue 11/14/2011 9:08 AM
	I have a customer who added an addition on to her house and wanted it to be heated. She currently has a gas fired furnace, we tapped into the supply and fed 4 registers of it and the run went straight upstairs through a closet. 8x12. the registers give 100 cfm each and the trunk line can handle about 450. she has no heat to these parts not and im clueless as to why. we fired up the furnace before and it blew out warm but now she has no heat in the addition. any thoughts?
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PWSlack Guru Join Date: Jan 2007 Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on. Posts: 32175 Good Answers: 839	#1 Re: Duct work issue 11/14/2011 9:21 AM
	Add "PTFE tape blocking a fitting" to the list of possibilities. __________________ "Did you get my e-mail?" - "The biggest problem in communication is the illusion that it has taken place" - George Bernard Shaw, 1856
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not so smart Guru Join Date: Dec 2008 Location: nj,usa Posts: 1253 Good Answers: 33	#2 Re: Duct Work Issue 11/14/2011 10:34 AM
	What is the furnace rated for? Remember the furnace was installed to handle the existing house. The addition, especially going up to a second level, will add a lot of strain to the expected workload of the fan. The fan may not be strong enough to push the heat that far. If you tested it on a relatively warm day you would get heat from the vents. But now it's colder and you are losing that heat on the first floor. try closing the registers on the first floor. Not a solution but an idea. She needs a new furnace rated for the greater square footage. Sorry. __________________ CARPE CRUSTULORUM!
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KJK/USA Guru Join Date: Apr 2010 Location: Mid Western USA - The Corn Belt Posts: 1439 Good Answers: 58	#3 Re: Duct Work Issue 11/14/2011 2:45 PM
	Does the client "perceive" that there is no heat because the space "feels" cold or is there in fact "no heat" due to no air-flow thought the new ducts? You state "4 registers" were added. Was a return duct added for the new space as well? Please clarify and we can proceed from here. __________________ The first 5 days after a weekend are always the hardest................................
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KJK/USA (1); not so smart (1); PWSlack (1)

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