Timeline for Should my furnace closet have this huge duct opening into the unconditioned vented attic?
Current License: CC BY-SA 3.0
7 events
| when toggle format | what | by | license | comment | |
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| Apr 27, 2014 at 14:19 | comment | added | Jack | Testor has a point as well about it being against code. Gas has its own set of rules. The manual would be good to have if it could be found. Have you looked inside the unit? It may sound impractical, but there may be a "safe" place where it may be stashed. | |
| Apr 27, 2014 at 14:19 | comment | added | iLikeDirt | No basement here. This is a slab-on-grade single-story ranch house. The furnace is 16 years old. | |
| Apr 27, 2014 at 14:11 | comment | added | Jack | Yes there would be a negative pressure issue. I remember having make up air intake being added in the homes. I am going by memory, since it has been a while and I don't want to steer you in the wrong direction. The duct coming from the attic does not ring familiar with how the make up air has been handled in the homes I supervised. It was usually added in the basement, sometimes with a exchanger added to it to condition the air as it entered the home. | |
| Apr 27, 2014 at 4:21 | comment | added | iLikeDirt | If the furnace was supplied with combustion and dilution air from the main living space, that sounds like it would create a significant negative pressure when the unit was operating, especially for such a beefy unit. So supplying it with this air from outside makes sense to me... but what an energy hit to essentially poke a big hole in the ceiling. It results in such drafts that we need to run the furnace more than we otherwise would! | |
| Apr 27, 2014 at 4:12 | comment | added | iLikeDirt | I should mention that I had a gas plumber in the house a few months ago doing unrelated work and had him test the furnace while he was in the house. He did not express concern with anything in the furnace closet and in fact remarked that it looked like a solid installation to him. Of course, he's a gas plumber, not an HVAC specialist. | |
| Apr 27, 2014 at 4:04 | comment | added | iLikeDirt | Thanks Jack. The manual was not kept with the unit, but the furnace itself has a sticker full of information (i.imgur.com/xvkgrCT.jpg). It's a Ducane MPGA125B5. They don't seem to manufacture it anymore and I'm having a hard time finding a manual or installation instructions. | |
| Apr 27, 2014 at 2:59 | history | answered | Jack | CC BY-SA 3.0 |
