Contemplating a full DIY ducted heat pump install
We have a house north of Seattle currently heated by all electric baseboard heating. 2400 sq. ft. and 80k btu’s of baseboard glory. The Manual J first floor total heat load is 18k btu and the second 12k. My calcs and a paid online service were within 1k btus on both. I got a quote for two ducted mini split systems, one for the first floor and one for the second. It came in at $14k before tax, and I wasn’t impressed by the company or their bid (i.e. I didn’t get the feeling I would get a quality install). So being a mechanical engineer I decided I would design and install the ducts for both systems myself and just have an installer install the two air handlers, fab the transition ducts from the AH’s to the duct I installed, install the outdoor unit, and charge the refrigerant. I know Fujitsu’s are the favorite on here but I can’t find anyone local and reputable that installs their equipment, but there are no shortage of Mitsubishi installers. So I spec’d a system with a Mitsubishi PEAD-A18AA7 for the first floor and a PEAD-A15AA7 for the second. I read Martin Holladay’s article on “Getting the Right Minisplit” noting that individual minisplits are more efficient than a multisplit system. This time around I got two quotes from a reputable company to install these AH’s with either a common compressor or alternatively individual compressors. The quote for the common compressor was $15k (with no ducts!) or $23k for individual compressors, both before taxes! Prices like this make me solidly consider just doing the whole thing myself. I will get no warranty if I do it myself, but I could replace the entire system a couple of times over for these prices. Am I out of whack on this?? I’m going to see about a quote from another HVAC company, but…
Anyone in the Seattle area have an installer they like?
I haven’t finished the second floor layout yet, but the first floor is attached.