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[QUOTE="Conndog, post: 2710563, member: 5939"]
We are putting in a mini split system for a/c and heat in our upstairs: 3 small bedrooms, hawway and a bathroom.  We are in colder climate in New Hampshire north of Keene.  We are Taking out the old cast iron radiators (5) which are steam heat, part of reason is to get rid of visible pipes going upstairs, also to improve efficiency and create zoned heat.  To account for really cold temps when mini split isn't efficient, we are using secondary system, it's a propane combi-vent boiler that will 1) replace electric water heater but also 2) make hot water for mini split system to draw heat from during the coldest weather (20 degrees or less, not sure exact temp).
     The cost scares me- quote we had was $22,000.  Need to investigate more, this may also include (it better include for that price) installing ventilation in both bathrooms we have that currently have none.  We will ask about price too because that's too much, didn't know you could negotiate.  As it is, the insulation we also are putting in everywhere costs about the same ballpark amount.
     One question I have, we aren't doing a/c downstairs.  Even if the a/c is only upstairs, won't it still cool rest of house, or at least make it more comfortable & less humid?
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