I was checking some REM/Rate files for our HERS raters yesterday, mostly submitted forENERGY STAR homes. I’ve come to expectManual J heating and cooling load calculations submitted along with the files to be less than perfect. Mostly, I accept them because they’re close enough. Yesterday, though, I received a Manual J to go along with a file for an ENERGY STAR home that was beyond the pale. It was egregiously horrific. It was spectacularly sordid. It did come close to meeting the ENERGY STAR Version 2 requirements for Manual J (tight or semi-tight infiltration and correct design temperatures), but whoever put this one together was singularly devious in his efforts to justify the oversized air conditioning systems he wanted to install.
Continue reading Oversized AC, Screwed-up Manual J, ENERGY STAR HVAC Tirade!
