It got down to the lower 50's last night, I got home late around 10PM, decided what the hey...
Note: Jotul has a Condar flue probe thermometer about 18" away from the stove, Defiant has a Rutland magnetic thermometer on the griddle and a Condar flue probe thermometer about 5" away from the stove (there isn't enough stovepipe to get that thing 18" away; the connection from stove to thimble is about 10" long horizontal)
Fired up the Jotul with about 6 woodbrickfuels, got it going with flue temps up to 800F briefly from the firestarters, then it died down a bit to ~350F and the woodbrickfuel started to burn on its own. Meanwhile I went upstairs and stacked 8 of the woodbrickfuel blocks, 2 on top of one another in 4 rows with firestarter sticks in between each stack. That lit up pretty well (air control wide open, doors closed), and by 11:30PM or so the Defiant was up to 350F griddle top (flue temp maybe around 600-700F?). I tossed in 2 more bricks and closed the door, then went off to bed. Woke up around 2AM, checked the stoves; the Jotul was cruising at ~800F flue temp, the Defiant was around 600F griddle-top temp with 1200F flue temp.
Note when I got home, the thermostat read 72F, which normally would be fine for me but tonight I wanted to have some fun
By 2AM it was reading 89F. Hot damn!
I closed the baffle on the Defiant to give the secondary air system a try; noticed within ~15min the griddle top temps dropped about ~25F and the flue temp dropped about ~50F. But I was starting to smell a bit of smoke, and could sense some airflow up above the main doors; I think I should replace the door gaskets first before trying the secondary air system since I know it fills up the firebox with smoke. Opened the baffle and let it run with the air control damped down just a tad, and by 6AM when I got up, the Defiant was running 250F griddle-top with ~400F flue temp (mostly glowing embers and ash), Jotul was down around 300F flue temp (barely any glowing embers, mostly ash). By the time I left for work (~8AM) the Defiant was around 175F griddle, 250F flue, Jotul under 200F flue temp. Oh and the house thermostat was reading 86F. Good show
Looks like the key with the Defiant was to load enough wood. 10 bricks is good enough for a hot overnight burn I think. May last longer if I seal the door gaskets and try the secondary air system. I didn't smell much if any smoke when running the Defiant in open-baffle mode, and the Jotul wasn't generating any smoke smell since I applied liberal amounts of furnace cement on its stovepipe connections. Truthfully I don't know if firing the Jotul is worth the fuel, at least it was providing hot air to the flue but it didn't really heat the house much. Probably heated the attic more than anything; most of its hot air migrates to the top of the basement stairwell, which sits high up level with the main floor's ceiling, so most of that hot air collects up top and heats the small bit of ceiling there. I had the basement door closed with my box fan pointed towards the living room running on low. (It was comfortably warm in my bedroom, not too much though. Just right. Had another fan running in there too.)
I was supposed to take delivery of 2 tons of that WoodBrickFuel last sunday but the folks forgot, heh, they're gonna try again thursday evening. I'm excited to use this stove this winter!