Mark P Posted February 4, 2008 Report Share Posted February 4, 2008 New construction. What is the rule on not having an air return within so many feet/inches of the combustion chamber of a furnace? Should I consider the filter opeing in this setup in this regards? This is how I was going to write it up, but maybe I should add something more? Opinions.... "Improve: Install a cover over the HVAC filter opening. Not covering this opening, allows for a substantial amount of air leakage around the edges of the filter panel rather than causing all of the air to flow through the filter. " Thanks Download Attachment: 1.jpg 45.72 KB Quote Link to comment Share on other sites More sharing options...
Phillip Posted February 4, 2008 Report Share Posted February 4, 2008 Mark, Your comment is what is need. The filter justs needs a cover over it. You could add that the unfiltered air is going to pull dust in and stop up the coil. Quote Link to comment Share on other sites More sharing options...
randynavarro Posted February 4, 2008 Report Share Posted February 4, 2008 What is the rule on not having an air return within so many feet/inches of the combustion chamber of a furnace? Should I consider the filter opeing in this setup in this regards? No. Opinions.... "Install a cover over the access port for the filter. The system will pull in "dirty" air from the garage and send it into the home." Quote Link to comment Share on other sites More sharing options...
Mark P Posted February 5, 2008 Author Report Share Posted February 5, 2008 Thanks Guys. Quote Link to comment Share on other sites More sharing options...
Bain Posted February 5, 2008 Report Share Posted February 5, 2008 The rule, just as an oh-by-the-way, is that a return-air register can't be within ten feet of a furnace. Unless, of course, the furnace is drawing combustion air from outside the house. Quote Link to comment Share on other sites More sharing options...
johnmcda Posted February 5, 2008 Report Share Posted February 5, 2008 Originally posted by AHIS New construction. What is the rule on not having an air return within so many feet/inches of the combustion chamber of a furnace? Should I consider the filter opeing in this setup in this regards? This is how I was going to write it up, but maybe I should add something more? Opinions.... "Improve: Install a cover over the HVAC filter opening. Not covering this opening, allows for a substantial amount of air leakage around the edges of the filter panel rather than causing all of the air to flow through the filter. " Thanks Download Attachment: 1.jpg 45.72 KB That return duct should be insulated Quote Link to comment Share on other sites More sharing options...
MMustola Posted February 5, 2008 Report Share Posted February 5, 2008 Why SHOULD the return duct be insulated? I agree that it would be nice if it was, but it is never done in my area. We do not even insulate the supply ducts unless they run through an attic. Quote Link to comment Share on other sites More sharing options...
johnmcda Posted February 6, 2008 Report Share Posted February 6, 2008 Originally posted by MMustola Why SHOULD the return duct be insulated? I agree that it would be nice if it was, but it is never done in my area. We do not even insulate the supply ducts unless they run through an attic. My bad - I should have qualified the statement to depend on the location of the furnace. Depends on where the unit is located. If it is in an unconditioned space such as a basement that is not heated or an attic, then it should be insulated Quote Link to comment Share on other sites More sharing options...
msteger Posted February 11, 2008 Report Share Posted February 11, 2008 If the furnace filter opening is uncovered and the furnace is in the garage, I would suspect a possible carbon monoxide hazard as well. Quote Link to comment Share on other sites More sharing options...
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