My neighbors D&L have a very large house, post & beam with strawbale & adobe exterior and earthbag interior walls. I do believe it’s got more thermal mass than Ian’s Cave, which is great in the summer but a surprising liability in winter because you can’t ever afford to let it get cold inside if you aren’t prepared to let it take weeks to warm back up. A couple of years ago they had to be gone for a few days and they actually hired me to come stay in their house, to take care of their animals but mostly…

…to keep their pellet stove running. Which I found kind of ironic, and also supplied quite an education in the advantages and disadvantages of pellet stoves.
Advantages: They’re super efficient. That one stove is their primary source of heat for the bulk of a 4000+ square foot house, and it does its job really well.
Disadvantages: Everything else. First, they require not only fuel but also electricity and lots of it. In town that wouldn’t be a problem but when you’re rolling your own juice that means you need sizable infrastructure just to run the heater, and you’d better hope nothing ever goes seriously wrong with it. You’re always one lightning strike or gloomy spell away from getting cold with no Plan B. I lived for five years in an RV trailer whose heater needed propane and electricity to work, which was connected to a really iffy power system, and I can tell you from experience that that isn’t a good situation to be in.
Of course D&L have a SUPER electrical system, with a big dual-fuel backup generator, so they don’t worry about that. But they paid a lot of cash for the privilege.
Second, the fuel…

…is expensive, and – around here anyway – kind of hard to get. You mustn’t ever let it get wet. And that pellet stove goes through a lot of it. D&L order theirs from the local feed store by the pallet-load, and during full winter they go through one and a half of those sacks every single day. Of course, it’s a big house. Also it turns out that there’s quite a quality difference between various brands of pellet, which leads us to…
Third, they’re complicated to maintain. Pellet stoves have a lot of moving parts, and like a revolver everything has to be working smoothly and freely or nothing will work at all. If your pellets happen to have a lot of grit and crumbles, expect the hopper and auger to gum up and stop the show every so often unless you thoroughly clean the whole damned thing, in each of its many crevices, daily. And maybe even if you do. D&L are very picky about the pellets they buy, and they still sift every bucketful before it goes into the stove. That little vacuum cleaner in the picture above is just for cleaning the stove. They had a lot of stoppages during their learning curve.
The reason all this has been on my mind is that in a year or two when I’m living on SS which will greatly increase my monthly income, I’d kind of like to replace the woodstove in the Lair’s main room with something that’s … not a woodstove. I have come to dearly love the thermostat-controlled propane heater in the bedroom but it doesn’t have the horsepower to heat the whole place. If I could afford the cost of another stove and the fuel to run it, it would be nice not to have to gather and chop wood every year. But I’m pretty much settled in my mind that if I ever do that, the woodstove will be replaced with one that burns propane, not wood pellets.