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Heating hours

Dave L_4
Dave L_4 Member Posts: 26
Does anyone have or no where to find the actual heating/cooling hours in a year for Connecticut or other specific areas.


Dave L.


  • flange
    flange Member Posts: 153

    there are published tables that give you this type of data. mine is pulled from the honeywell engineering manual of automatic control, i-p edition. this is an excellent book by the way, and can be had for about seventy five bucks from honeywell. total degree days for Hartford for instance are 6174, with a heating design temp of 7 degrees, and an annual mean temp of 49.8 degrees. for cooling, total degree days is 666, with design dry bulb of 85 and an average wet bulb of 74. these figures were taken from the National Climatic Data Center, and are probably published on their website as well.
  • Harold
    Harold Member Posts: 249
    Heating cost calculation

    Is this the way to calculate the yearly heating cost?

    Net load number from Wirsbo design software = N.
    Difference between indoor and outdoor design temps used for calculation of net load = TD

    N/TD = BH (BTU per hour per degree)

    BH*24 = BDD (BTU per degree day)

    Degree Day = DD

    BDD*DD = BY (BTU per Year)

    Then just take fuel net efficiency and energy content and calculate cost.

  • doug_10
    doug_10 Member Posts: 102
    Might be worth checking out?

This discussion has been closed.