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Maybe this is something to have the landlord check? In practice I don't think most gas furnaces are as well sealed as advertised. Many years ago when I lived

Maybe this is something to have the landlord check? In practice I don't think most gas furnaces are as well sealed as advertised. Many years ago when I lived in a house with gas heat with a dodgy pilot light I got a pretty good feel for how the thing was put together and it was absolutely not hermetically sealed.

Brian_K_White 4y ago
It's not supposed to be sealed, it's just supposed to have draft. (the flue always vacumming from convection)
- throw0101c 4y ago
  > It's not supposed to be sealed, it's just supposed to have draft. It depends on the model. High (>90%) efficiency, condensing furnaces are completely sealed off from the house: they take in air from the outside (via PVC pipe), combust, extract the heat, and exhaust the results (via PVC pipes). * https://www.youtube.com/watch?v=lBVvnDfW2Xo https://www.youtube.com/watch?v=lBVvnDfW2Xo Older lower efficiency (<85-90%) furnaces suck in air from the house, exhaust into metal pipes (PVC would melt because not as much heat is extracted from the fumes), can be back-drafted and you have to worry about CO. Basically: if the furnace has vents in which you can see a pilot light, it's the older style.
MrStonedOne 4y ago
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