Everyone in the HVAC world talks about the importance of getting heating and cooling load calculations based on ACCA Manual J. A great number of HVAC contractors don't do these, and instead sell and install equipment with air distribution systems they choose based on rules of thumb ... and these oversized systems tend not to work so well.

But what if you do hire a contractor or third-party designer to do Manual-J load calculations and you're not an expert? Suddenly you're faced with a bunch of seemingly indecipherable reports. How do you know if they're accurate or not? ... Allison Bailes provides some assistance.

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