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No problems with humidity in the home because the undersized ac runs for longer times and lots of water drains from it. We also have a whole house dehumidifier on top (but even before it humidity...

Thanks for your input, it really helps to have another opinion. On the Harmony III, you can specify CFM per-zone. So if the basement is not calling, the CFM would not go as high as 1900 CFM. But I...

That's correct. I think the AC is undersized for better dehumidification and energy savings (longer run times). We're right on the shore of Georgian Bay. We also have somewhat cold winters, so the...

Thanks! Glad we can do it with the current AC. If the four 6" ducts to the loft are not enough is it possible to make the great room dampers open for both the loft zone and the main level zone? Since...

We have four 6" ducts going up there. Do you think that's enough? Or do you think we still need a dump zone? I'm not sure how low the fan speed can run with the 2.5 ton single stage AC unit.

Hi guys,

I am looking to get retrofit zoning done on my system but wanted to check that it is actually possible since I have read that the AC must be dual stage for more than two zones.

I would...