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Green Building Bible, Fourth Edition
Green Building Bible, fourth edition (both books)
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Heating and cooling: Oops forgot to turn off summer bypass

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  1.  
    • CommentAuthortony
    • CommentTimeOct 21st 2015
     
    Yesterday after we noticed that our lounge was a bit cool (20C) I discovered that I had not closed the summer bypass on our MVHR --yes big oops. But we are in October, remarkable.

    Lots are turning their heating on we just turned our outdoor cold air ventilation fans off and started recovering exhaust heat.
  2.  
    The heating has been on for a few weeks in the uninsulated and draughty rental property I'm currently in sadly!

    I have never lived with MVHR but am having a system installed in my new build. Is the summer bypass something you need to actively turn on and off? Speaking to the rep (if I understood correctly) it can be automatic above a certain temperature.
    • CommentAuthorPaul_B
    • CommentTimeOct 21st 2015
     
    I turned our heating on for the first time last Tuesday then turned it off again on Saturday. Unfortunately it is back on today as the internal temperature dropped below 18 degrees
    •  
      CommentAuthordjh
    • CommentTimeOct 21st 2015 edited
     
    Posted By: richardelliotIs the summer bypass something you need to actively turn on and off? Speaking to the rep (if I understood correctly) it can be automatic above a certain temperature.

    Depends on the model. Mine is fully automatic, with adjustable cut-in and cut-out temperatures (hysteresis). I'm thinking it may make sense to tweak the temperatures up a bit for winter to preserve as much heat as possible.

    Oh, and I'm thinking about fitting my post heater this weekend :bigsmile:
    • CommentAuthortony
    • CommentTimeOct 21st 2015
     
    Post heat pump would be better.

    Air likely won't shift enough heat unless you are extremely well insulated
    •  
      CommentAuthorSteamyTea
    • CommentTimeOct 21st 2015
     
    21°C here, not had heating on yet. It did drop to 17°C the other night when I left a window wide open.
    I noticed that my Mother has the heating on in the evenings, but she is tapping on a bit at nearly 90. So shall let her off (but did turn some radiators down in unused rooms when she was not looking).
    • CommentAuthorgravelld
    • CommentTimeOct 21st 2015
     
    Heating been on for two weeks!:shamed:
    • CommentAuthorborpin
    • CommentTimeOct 22nd 2015
     
    Posted By: djh
    Posted By: richardelliotIs the summer bypass something you need to actively turn on and off? Speaking to the rep (if I understood correctly) it can be automatic above a certain temperature.
    Depends on the model. Mine is fully automatic, with adjustable cut-in and cut-out temperatures (hysteresis). I'm thinking it may make sense to tweak the temperatures up a bit for winter to preserve as much heat as possible.

    Oh, and I'm thinking about fitting my post heater this weekend
    My Helios unit is fully automatic and I have it set so if internal temp drops below 20 then it kicks in all year.
    • CommentAuthorborpin
    • CommentTimeOct 22nd 2015
     
    Posted By: tonyAir likely won't shift enough heat unless you are extremely well insulated
    But it is not designed to heat the house, simply to assist the bypass to ensure you are not feeding cold air into property.
    •  
      CommentAuthordjh
    • CommentTimeOct 22nd 2015
     
    Posted By: borpin
    Posted By: tonyAir likely won't shift enough heat unless you are extremely well insulated
    But it is not designed to heat the house, simply to assist the bypass to ensure you are not feeding cold air into property.

    Yes, it is designed to heat the house. It should meet the max PHPP load at design temperature.

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