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Yea right lowtemp, or better still we can be stupid like you and post a link to the stupid DIY website right here! :mad: nice move lowtemp.

You need to do a heat gain calculation to size the air conditioner. It depends on a lot more than just the square feet. It is also important to get the right size. I recommend you go to...

I've been using Don's programs since the mid 80's!! They give you exactly the same answer as a manual Manual J calculation. The Design temps buit in to the program are the same average design temps...

Hi leedesert - Yep, sounds like the right size to me. 2 tons is exactly what you need.

Glad we could be of help. :)

A local bar was so sure that its bartender was the strongest
man around that they offered a standing $1000 bet. The
bartender would squeeze a lemon until all the juice ran into
a glass, and...

I bought Wrightsoft with Draw but tried the demo of HVAC-Calc and found it to be much much faster and easier to use, so even though I spent a bundle on RightSuite I went ahead and bought HVAC-Calc. I...

Actually, the HVAC-Calc manual says the loads are as accurate as possible, and contain no safety factor. It recommends that a furnace be sized 20% to 25% larger than the design heat loss. It is...

Yes - I use both HVAC-Calc programs, great stuff, good price too. As a member of HVAC-Talk you can get a discount if you get both programs. Take a look here:...

I think it is important that students learn how heat loss and gain works, i.e. where it comes from, how glass direction has a large influence on gain etc.

You need to teach how heat loss and gain...

Yes, I've said it before but no harm repeating it, I bought these programs at the beginning of the summer and I am very happy with them. They are fast and accurate. I must say I don't have as much...

Correction Jerry, I see that your sensible load is 36,605 and you have a very low latent load of only 1,840. I didn't notice that in my previous post. You must live in a very dry climate, like AZ. ...

Hi Jerry - If your total heat gain is 38,445 then you probably need a 3 1/2 ton AC. A 3 1/2 ton unit would have a total cooling capacity of 42,000 BTUH, but usually they are less than that.