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  1. Replies
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    Hmmm...are you saying the manual J calculations...

    Hmmm...are you saying the manual J calculations from contractor #1 and the HVAC software (link above) I purchased is not enough? All contractors have been told that we are going back with new Marvin...
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    It is very much like Baldloonie described. Long...

    It is very much like Baldloonie described. Long party walls and windows and doors facing north and south. We purchased the property and are gutting it. House will be fitted with new low-e glass...
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    I take it from your responses (nashobasales &...

    I take it from your responses (nashobasales & t527ed) so far that tonage is an absolute.

    We purchased software from the link above and ran the numbers so that we might compare it to their results....
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    contractors give different tonage quotes

    We are replacing the HVAC unit in our townhouse in Washington DC and are getting quotes on a dual fuel system from 3 contractors. All 3 levels of the building total 1200 sq ft. Depending on who you...
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