Name:   boataholic - Subject:   Havoc mini split wall remote system Date:   1/8/2014 1:55:46 PM

I have had a Mitsubishi mini-split in a 12x16 addition for about 4 years now.  Normal room, not a sunroom, but as I recall it claimed it would cover a room up to 600 sq feet so I assume the excess capacity will handle a sunroom.  It was bigger than needed because the supplier did not have a smaller one in stock at the time.  Paid less than $1500 installed but the AC guy is a neighbor so I might have gotten a deal.  It is dead quiet inside so I love that.  Outside unit has a fan so it initially vibrated a bit (installed on a deck), but some big rubber washers from Lowes eliminated that.  You have to be near the outside unit to hear the fan.  I wish all ACs were that quiet.  I think you need a second quote.  You can google the price of Fujistu 18,000 btu minisplits and see that even with the local supplier markup your price seems high.  Installation consisted of drilling a big hole in the wall to run pipes and wires, hang inside unit on wall and connect pipes between interior and exterior unit, run power to exterior unit.  2-3 hours in my case, but obviously things vary depending on how far they have to run power and whatever special situations your house has.  But for $4500 I would think you could replace a whole house heat pump for a small house and that involve more time, bigger equipment, more freon and longer runs of copper pipe.