Mitsubishi rep says minisplit won't work ... back to geo?
So after recommendations on here and other research, I have been in communication with a Mitsubishi rep and a local installer on my new house design. Currently it is roughly 3200 total conditioned square feet (single story with walkout basement). R values are roughly 15,30,40,60, with 7400 HDD in zone 6. Current loads are around 20-22k we think (hope). The plan was to use a single unit with 4 heads. 2 up and 2 down. 1 ducted unit to serve 2 bedrooms and 2 bathrooms, then a wall unit to serve an open living, dining, and kitchen. Similar situation in the basement.
However they are saying this is not going to be cost effective at all. The standard mr slim units are rated to around 15 degrees requiring electric base boards to pick up the slack, which would be expensive I assume.
Their hyperdrive is a one to one unit, so no zoning but rated to -15. They are also saying they cost around $8k each vs nearly 8k for the entire assembly! Even if we eliminated 2 of the heads, and use one up and one down, that is still more expensive then geo.
Geo is around $20k before credits from feds, local utilities, and state. After credits, it puts it around $12k. I was also planning on using the desuper to dump into the electric waterheater to pick up some of the heating as well. (although minimal I realize).
What are the pro's thoughts on this?
Posted Aug 15, 2011 10:10 AM ET
Edited Aug 18, 2011 5:42 AM ET
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Minisplit setup for New Jersey, 750 sq. ft. house over crawl. Bouncing my HVAC contractor's plan off you guys.