Heat Pump for a Small House
I have a 1050 sq ft house. It has 3 bedrooms, each about 110 sqft. I currently have a 36000 BTU gas wall heater and two window ACs totalling 18000 BTU. I live in San Francisco Bay Area, California, where my summer temps don’t usually go above 95F (35C), while winter temps usually don’t drop below 36F (2C).
I had one contractor do a “wild guesstimate”, and talked about an 18k BTU Heat Pump. General calculators online put heat load at around 30k, while cooling at around 20k.
If i take a mini-split, the smallest consealed ducted indoor unit available is 7k from Fujitsu, Daikin or GE. Even 6k wall units seem like a gross overkill for 110sq ft bedrooms.
Smallest 4 zone ducted mini-split system i could find is a 36k BTU system, which seems a bit much as well.
What are my options?
1) I’d like to have a zoned control for every room. Ideally 4 different zones.
2) The system could be a little bit larger than needed. I plan to build a 500 sq ft addition. Bedroom sizes stay the same.
In my case i keep coming back to a traditional split heat pump with air handler, ducts and damper control.
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