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Originally Posted by chassis
I have experience with split systems in commercial office applications.
The benefits are efficiency and individual zone (room) control. What are the reasons your architect is selling you on them? Does he get a commission from the distributor? Ask him.
The architect can and likely has done the calculations to size the units to adequately cool the zones. If you doubt this then find another architect because this is an entry level calculation.
Tubes for refrigerant are insulated.
We prefer Mitsubishi, with Bosch a second choice.
Noice is different. I have been able to hear central forced air AC units in all houses I have lived in. Some quite loud in fact with booming duct sheet metal. Split systems will have a different sound as compared to a central force air system. Whether it is better or worse is your call. I don’t mind the sound of a split system.
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I'll ask him. He said they are using them a lot in their LEAD and "green" builds and getting away from natural gas in general He's also big on induction stoves over gas ranges (another point I'm not sold on).
He knows that ceiling height in the basement shop below is a big deal for me so the lack of duct work is a good thing. Also, he knows we are on a budget so I think in general the mini-split system ends up a little more cost effective than a furnace, an AC unit, and all the duct work.