"On retrofits we are between about 1000 and 1600 sf/ton cooling. We put a 3 ton unit on a 5000 (?) sf new build, and it didn't appear to slide from set point all summer.
750-1200 sf/ton for heating, Northern Ohio.
Usually we find (from…"
"Unless the builder did a really crappy job with the house or it has an unusual load, 750sqft per ton should be the MINIMUM. Yet in our area 600sqft per ton is typical for new construction. Meanwhile houses that were built in the 1970s are…"
"Be sure the size that you ACCURATELY calculate actually gets installed. Often contractors pretend to do load calcs that "just happen" to come out to whatever the standard sizing is for the area. If you're getting about…"
"A Resnet HERS index rater will give a size and will preload ACCA MJ wright soft.com Then will have to adjust peaple load and about 11 other things. But a if you per load name, wall/attic size R/U window size, door size, solar input on…"
"I'd recommend this one (link below). It covers the fundamentals as well as the use of software. If you scroll to the bottom of the page, you'll see a YouTube video that'll tell you a little about the course…"
"start with the base:
Principles of Heat Transfer• Heat energy cannot be destroyed.
• Heat always flows from high temp to low temp
Conduction through a Shaded WallQ = U X A X TU – Overall heat transfer coefficient of the…"
"WOW what is your back ground? I have been teaching ACCA MJ for 30 years and each class is for skill that should be used in work. Most HVAC schools will have heat gain heat loss class. I just did a heat loss - code class for…"
"It depends on your goal.
If it is to start generating designs quickly using one of the Manual J softwares, then it is best to take the software manufacturers classes and read their manuals and just jump into the software with small…"
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