I too have one of those, in my barn. I believe it’s a 1000 watt device as well and when I walked in the storage room it was in the mid 40’s.I got an oil filled radiator in my upstairs bathroom now. Better safe than sorry
The grow rooms were fine but the storage room is not insulated.
Not a real big deal except my water storage is out there.
Need to make sure to pump water into the veg room reservoir to warm up.
Daily so we always have room temp water.