-34 celcius with the wind chill dipping below -50, i finally broke down and threw some oak on the fire.....was hoping to go the entire winter without reaching into the oak stash, its dry, just wanted to save it for next year once the wife is off mat leave and we can make better use of longer burning hard woods, but ill tell you what....it was worth it.....threw it in and five minutes later the damper on the shove was shut down another 50% from where i usually run it, the blower fan on the back to englander was turned to high, the stove temp was rising and the house shot up 6 degree's in about 20 minutes......I LOVE DRY OAK