Lost in a sea of HVAC
Hi everyone, On one hand, I'm very lucky: last year my partner and I purchased our first house! It feels great to hop off the renter hamster wheel. On the other hand, we had to make some...
Hi everyone,
On one hand, I'm very lucky: last year my partner and I purchased our first house! It feels great to hop off the renter hamster wheel.
On the other hand, we had to make some compromises when we bought the house: I wanted to limit our search to houses that already had central air (heating and cooling), because we both work from home and I really want our house to be comfortable year-round. Unfortunately, in Northern New England, that eliminates around 90% of houses. So we compromised and bought a place that has a furnace with ductwork, hoping to eventually add cooling using the same ductwork. Last year, I reached out to a couple of contractors to get a vague sense of how possible that might be. Consensus? Potentially expensive, but feasible.
My situation:
- our house is small, ~1100 square feet in the finished upstairs
- half of the upstairs has shit insulation, other half is decent after renovation
- we currently have a 100k BTU oil furnace that absolutely keeps up. In fact, as far as I can tell, it's massively oversized -- even on the coldest nights (around -20 or so most winters, including this one), it only kicks on ~50% of the time
- we used around 500 gallons of heating oil from September-May (the heating season)
- our furnace is awkwardly tucked between the outlet chimney and three walls, which makes accessing it a pain (and complicates installing a coil on top; I'm not sure if there's enough room).
- thanks to a nearby massive hydroelectric dam, our electric rates are about half the average New England electric price (and come from a pretty environmentally-friendly source!). So the more heating and cooling I can do with electric, the better IMO. I'd rather pay a bit extra to heat with clean electric than save on propane/oil if fossil prices come down (big if).
With the warm season upon us, I'm feeling the heat during my work-from-home days and trying to get cooling installed before the temperature really starts cooking. And, despite having a furnace with existing ductwork that covers every room in the house (90% of which is directly accessible through unfinished basement ceilings), every. goddamn. contractor. has. recommended. minisplits.
But I don't want minisplits. I know it's easier for them. I know it's cheaper. I know most contractors in the area have installed hundreds of minisplits but very few central systems (let alone a combined heating/cooling setup where you have to worry about balancing summer dehumidifying with extreme cold efficiency). I know I'll have to clean out and insulate my ducts. Minisplits would surely work OK, but I really don't want to install one in each of our three bedrooms, plus one (or more) in our open-layout kitchen/living/dining space, and then still deal with no direct cooling in the bathrooms. Aesthetically, my partner and I both find minisplits ugly, and our house is small enough that most minisplit designs would make the tiny bedrooms feel even more cramped.
Ideally, I'd rip out our existing furnace (and oil tank!), install a cold weather heat pump in its place, insulate the ducts, and call it a day. But every contractor also advises that I "keep the old furnace around" in case the heat pump breaks (seriously?) or in case the heat pump can't keep up on the coldest days (fair enough). And then we take a look at the existing furnace, conclude it would be hard to add cooling on top of it, and they tell me to think about minisplits again.
So I guess after all of this, I'd really appreciate some advice from tilderinos with more home improvement experience than myself. Should I think about this differently? How on earth do I find a contractor who knows what they're doing with central heat pumps who doesn't push me aggressively towards minisplits or keeping my dirty, noisy, expensive furnace around? Should I just roll over, give up on my central cooling dreams, and install some minisplits?