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Green Building Bible, Fourth Edition
Green Building Bible, fourth edition (both books)
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General: Warm air heating

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  1.  
    • CommentAuthorskenn_ie
    • CommentTimeNov 1st 2007
     
    Hi, I am considering installing an oil to air and warm air heating, and would appreciate comments about it's desirability, and design. In particular, I would like some insight into the design of the actual heat exchanger. I have found none that meet my requirements ... most being gas fired. I expect to buy an oil burner, and get the rest fabricated.
    • CommentAuthortony
    • CommentTimeNov 4th 2007
     
    What will this heating system be for? If it is for a home then why not spend on insulation and air sealing then you wont need heating.
  3.  
    It sounds like your refurbing, if you are trying an all-air heating system you must be designing to PassivHaus standard. Due to thermal bridging and airtightness issues this is particularly challenging in existing buildings. It you have an airtight that is not super insulated home then you may be better with >80% efficient MVHR. If the house is not airtight (and tested) then I reckon that draft proofing (airtightness) and insulation should be the first port of call before MVHR and certainly before all air heating.

    Mark
  4.  
    Mark,

    one doesn't have to have a passivhaus standard of building to use forced air heating. The comments about insulation and airtightness apply to all houses, regardless of the heat delivery system. Forced air is unusual in Europe but is the norm in North America, mainly due to the need for air conditioning in the summer. Air leakage doesn't affect forced air heating systems more than hydronic - it's equally bad in both/all cases. Of course, the nice thing about an air delivery system is that humidity control can be incorporated into the system, should it be required (plus air conditioning too for those climates that need it).

    Paul in Montreal who lives in an old house that's certainly not passivhaus standard but who does have forced air heating (albeit supplied by a GSHP).

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