heat


  #1  
Old 01-02-02, 04:19 AM
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Here is the thing we got the furnance in 2000 Jan.,The furnance is at one end of the house and by the time the heat gets to the other end it is cold air blowing out which doesn't heat the rooms its running to.My newphew is in the heating and plumbing and he said it needs bigger tubing to the rooms or another fan or wrap insulation to the heating tubes to those vents to the rooms in the back.
 
  #2  
Old 01-02-02, 04:52 AM
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Since the vents have cool air coming out of them indicates the ducts are sized properly. If very little air was coming out it could be the size or a patially closed damper. What you're experiencing is distribution loss. This is the difference between the temp. of the air at the furnace to the temp. of the air that comes out of your vents in each room. The further away from the furnace the greater the degree difference or distribution loss. The reason for this is that air does not hold heat well. The other factors are the materials used to distribute, example sheet metal, and surface area. Sheet metal conducts heat and cold easily. If you were to take down the duct work and unfold it, it would cover your basement floor. This is a large surface area coupled with the fact that it's sheet metal and air does not hold heat well, will result in what you're experiencing with the long run of duct work to those rooms.

The solution to this is to reduce the distribution loss by insulating the duct work. This will not only bring up the temp. of the air coming out of those vents but will also lower your heating bill and cooling bill if you have air conditioning with the unit.
 
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Old 01-02-02, 05:28 AM
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What wrote makes since,so we will insulate our duct work and it will hold warmer heat then.Thanks you for the info...
 
  #4  
Old 01-02-02, 05:35 AM
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Our duct work is plastic tubing whats the best way to insulate it more?
 
  #5  
Old 01-02-02, 08:19 AM
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Your ductwork is known as flexible ductwork and it is already insulated. Which makes your problem somewhat more perplexing. I am assuming that the main trunk(duct) is sheet metal and the ducts that come off the main duct are flexible. I would check the connection of the flexible duct to the main duct. There should be a damper located where the two join. Also feel if air is leaking there too when the unit is on. Follow the flexible duct from the main duct to the room you're having the problem with. You will see the duct is being held up in the ceiling with hangers. Make sure the flexible duct is not draped over the hanger, thereby restricting the flow of air.
 
  #6  
Old 01-02-02, 09:49 AM
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There are no dampers on our furnace,at least not where you wrote it should be.The Flexy hose goes directly on the trunk and there is no room for nothing else.I'm so bothered with this problem anymore....
 
 

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