$6+ heating oil prices got me thinking about lowering the costs... I wild like to conduct an expert opinion poll. I have a tankless water heater (coil) in my oil-fired furnace. Heating is baseboards plus mini-splits. I'd say we use oil to heat the house no more than 50% of time. Boston winters are warm enough for mini-splits, we keep temperature low (we heat only occupied rooms. warm clothing is dirt cheap compared with heating, sleeping at 54degF under down comforter is actually very pleasant ;o) ). By we I mean active 60+ couple.
What I am getting to is this:
- coil water heater is more efficient (than tank) only when furnace is used often, isn't it?
- we make an effor to use furnace less
- we do not use furnace in the Summer. Questions:
- At what point tankless water heater loses it's efficiency advantage compared with (well insulated) hot water tank?
- I can think of only about separate-heating-zone water heater. Are there other (more efficient) options/technologies?
- What is the installation cost (parts and labor) in Boston area (ballpark, say, +-30%)? I hope this topic would be of interest to many people, thank you for reading.