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Im not a pro. A couple things to check. To start with do you have enough amperage left over in your existing electrical panel? 200A panel? Check with building code you could be required to have some air circulation using your existing ducts or changed to HRV. As Masraum said there is ceiling cassette units available, a little pricy but clean looking. Really don't think gas is more efficient, modern heat pumps can be near 300%, running cost depends on utility price.
Some of the new mini splits are an easy DIY install. For your last question about the AC lines, the lines used with a mini split do both heating and cooling, basically the system just runs flow backwards to flip the hot and cold side.
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Last edited by 908/930; 02-15-2024 at 11:43 AM..
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