I'm finishing part of my basement, adding about 450 square feet to my 2000 square foot house in Pennsylvania. With colder winters here, I'm trying to figure out the best way to heat this new space. My current HVAC system is forced air, but it's not sized to include the basement. Here are the options I'm considering:
1. Adding extra HVAC ducts:
- Pros: Utilizes the existing system.
- Cons: Involves additional ductwork and possibly a larger furnace, plus the basement won't have independent temperature control.
2. Using electric baseboard heaters (240V):
- Pros: Allows for independent temperature control in different areas of the basement.
- Cons: Needs a new electric subpanel because my main panel is full. Electric heat can be pricier, and I'd lose AC unless I modify the HVAC.
3. Installing a 2-zone mini-split:
- Pros: Offers both independent heat and AC, and is cost-effective.
- Cons: Higher initial cost and takes up wall space.
4. Going with portable electric heaters (120V):
- Pros: Can be taken out in summer and provide flexible heating.
- Cons: Less efficient than 240V baseboards and shouldn't be left unattended.
3 Answers
I'd suggest the mini-split, too, but I'd recommend going for two separate single units instead of a two-zone system. In my experience, the two-zone model can be bulky and uses more power. Having individual units can be more efficient and give you better control.
If you want an alternative, consider an oil-filled portable radiator. I have one that warms my entire 1300 sq ft basement quietly and efficiently. Plus, it has a smart thermostat! I also installed ductwork, so I use it as a supplementary heater. It's fantastic for those chilly days!
Definitely go for the mini-split! They save space on walls and provide great efficiency. You can control the temperatures independently, which is perfect for basements. Plus, with ceiling cassettes, they blend in nicely. It's really the best all-around option for what you're creating down there.

Totally agree! A mini-split is the way to go.