I installed the Mitsubishi units in my house 2 years ago and haven’t had any problems.I have a air handler in my attic which does my second floor , wall units on the first floor and wall units in my finished rooms in my basement, 5 total zones .

I expect 20 years out of the Mitsubishi.

As an example, if you keep the floor plan on your new units relatively open (e.g. open concept kitchen / living / dining) a 3/4 tonne high-efficiency, cold-weather ductless split (See the Mitsubishi Mr.

Heat pumps also act as central air in the summer months.The Mitsubishi H2i ductless mini split heat pumps heat down to -15 and no backup source of heat is needed and is more efficient then even a high efficiency gas furnace, which is ridiculous.... but they are very expensive.IMHO,Gas heat is the cheapest when balancing up front installation cost and long term utility costWe are talking a $22.50 difference between gas or electric per 1,000,000 BTUs burned.

I heard of gas mini split systems that can be installed and installation costs might be much cheaper and the systems are supposed to be efficient by mitsubishi. 

A small 3/4 tonne ductless unit should have ample capacity to handle an 800 ft^2 unit.We've used the air-handler along with an HRV deliver conditioned fresh air (heated or cooled) into bedrooms and exhaust stale air (while recovering the energy) from washroom & kitchen.In your climate, where cooling is more important than heating, you could probable put a small HRV/ERV into the unit independent of 3/4-tonne ductless heat pump .... depending upon your budget.Our favourite brand/model is the Mitsubishi Mr.

Spending 5+ years in school to become a CAD administrator working for Mitsubishi and earnings $50k/year.

@Ricky Bass we use Mitsubishi half ton wall units.

Wife drives a 2009 Mitsubishi Galant.

@cara LonsdaleI sold my 2007 Mitsubishi Gallant that was in great shape I ddidnt have any repairs for 5500 and the car is still on the road two years later and is perfectly fine.