DIYbanter - View Single Post

DT

In article . com,
says...

How hard is it to do the "Manual J" A/C tonnage calculation for a
residential detached home?

(Case in point: a 1966 brick ranch home in Denver Metro; 1400 sq ft
main level, 1200 sq ft basement.)

What is the procedure to follow? Download the Manual J spec and follow
the instructions? Or is there some kind of software or Excel
spreadsheet that will make the calc easier?

I don't think there is a source for free Manual J software. I had to submit one
for the addition I built to my home. I used Hvac-Calc, here is a link. It's $49
for a one time license. It works quite well, you enter every wall, ceiling,
floor, window, door, etc into the program. The results show heat loss/gain for
every room, plus totals. It passed my building department just fine.

http://www.hvac-calc.com/main.asp

--
Dennis