Questions on heatpumps vs. electric baseboard and an a/c question (for small room)
I work from home, and have an office that’s about 20′ X 8′. It’s a converted front porch, that does have some fiberglass insulation, but with a lot of window light (five 4X4 double-pane sliders — about 80 square feet of glass, plus an exterior door). It is northeast facing.
There is no a/c out here, but I need it. July and August get unworkable. The heat in the porch is electric baseboard (4 baseboard units). This is in the NE US, with the heating season running Oct – April, and sometimes it can get to below freezing outside, especially Dec – Feb.
For the downstairs part of the main house, we are looking at installing a ducted a/c solution (the Mrs. says no to ductless mini splits). While we are doing that, I want to solve the a/c need for my office, too. But, my office has a really different eco system then the rest of the house. I am therefore thinking of putting it on it’s own a/c.
I need quiet as I spend a lot of time on the phone, so I’m thinking a ductless mini split, but it’s a lot of money for one room.
If I put in a heat pump ductless unit for a/c, would I get any ROI on using the system for heat over my electric baseboard? If there’s a good ROI on it, it might help justify the cost of the mini-duct system. If there is no ROI (or if it’s a 10 or 15 year return), then that becomes less attractive than just running a single a/c duct to the office, and putting up with the oddities of being off-zone. Another option is a fan in the doorway, but I want to be able to shut the kids out so I can work.
Any help, pointers, general impressions or links to on-line calcuators is much appreciated.