Heat pump for a remodel – Questions for a remodel in a Marine (3C) zone
Thanks for your thoughts in advance!
I’ve been reading everyone’s comments and so many articles to come up with efficient ideas for an impending remodel, and I’m curious what others think at this point.
I’m in zone 3C (Marine), and the ocean moderates the climate in my neighborhood so heavily that it’s always slightly chilly, but never freezing. No one installs air conditioning.
For those of you who like added data, my current rolling average is 150 only cooling degree days annually, compared to 3300 heating degree days. A little bit of heating almost constantly, and we’re usually too excited to feel temporarily warm to mind there is no A/C.
I’m planning a gut and remodel to convert what’s effectively a garage on a concrete slab to cover a small bathroom and open concept kitchen and living room. Probably about 450 sq feet with vaulted ceilings.
There’s no way the heating system in what remains of the rest of the house will do anything useful for this remodeled area.
With mild year-round temperatures, I was looking at air heat pumps as an efficient energy source. I currently have natural gas heating, but solar covers basically all of my electricity needs so I prefer electric over gas heating if I can keep it efficient.
Here are the main areas I’d like feedback:
- The ground is sand. Literal sand. Was I informed correctly that’s too unstable to make ground heat pumps a smart choice long term?
Any experience with an air heat pump system in marine zones? Do all the metal fins rust really fast like I’m picturing they will?
Is radiant flooring worth it? It sounds so nice compared to just a warm air vent from a ductless split-pump system and I’ll barely use the air cooling half.