I've burned several evening fires to take the chill out of the house. House in the low to mid 60's, but the outside temp was typically in the mid to upper 40's. Typical shoulder season issues with establishing a good draft - hard to start fires after the kindling fire, etc. Last night dropped to ~ 31 deg. in southern NH, and the temp was pretty cold by 10 pm. Decided to get a fire going, and the difference in outside temperature really made a difference in the ease of getting the fire going and keeping a steady fire once established. Did a small reload at 5am this morning and it's a nice 73 in the house right now and a heavy frost on the truck outside. Feel good! Cheers!