Heater for 4x8 tent

Good day, had my garage furnace kick out for a night when it was -25C out and caused the plants to get a bit cold and stressed them. Tent went down to 8C.
What have you used for space heaters in your tents/rooms (oil/electric, ceramic)? Any heaters with digital timers built in? Thanks folks...

For quick on demand heating I use a small ceramic attached to a controller. Inkbird type.

For veg I use an oil filled heater. But its not good for on demand.

I installed a used Rinnai direct vent propane gas heater I bought on craigslist for $200, it has a digital thermostat with clock and programmable if needed. I had to pay for professional installation (not diy on gas, thank you very much) so that was an added cost but living in Vermont heat is not an option. I was temporarily using an electric space heater but they terrify me, but I might use an electric oil-filled register heater if I had no other choice.

I am using the heater to heat the room, and then the tent draws heated air in by the passive intake of the inline fans. This is my first winter, so after a bit of experimentation with ventilation, I found that I need two inline fans on my 4x4 tent to control the heat without losing too much out the window.

What I found works best is I have a 4" AC Infinity fan exhausting air from the top of the tent into the room, I keep this on a low #3 setting running continuously throughout the day with lights on. This fan will shut off if the tent gets too cold but so far that is not an issue. This fan keeps the air moving and refreshing in the tent. I have a second AC Infinity 6" fan with carbon filter that exhausts the tent and vents directly outside, this fan is set to kick on at #5 when the heat gets up to 80 degrees F.

Since this fan vents outside, this keeps the room from getting too hot and also keeps the humidity down while also forcing fresh air into the room and tent (by exhausting out the window). This way, I am able to use the heat from the lights on in the tent to keep the room warm without running the propane heater, exhaust excess heat out of the building, keep fresh air passive intake and maintain continuous recirculating air without getting the tent too cold or too hot.

When the lights go out, I keep the 4" fan on #5 exhausting into the room, and the 6" fan is set to exhaust outside when the humidity in the tent gets above 60%, this keeps the room and tent from getting too humid without a constant exhaust losing heat out the tent. I set the propane heater to 72 degrees F with the lights off, and it keeps the tent at about 70 degrees F.

It might seem elaborate but it is working perfectly.

TintEastwood said:

Inkbird type.

Click to expand...

Make sure the inkbird can take the amps. The 308 only takes 10 amps, their 608 will take 15. I think those are the model #'s. lol

Is that meters or feet ? I use a $10 200 watt ceramic heater for a 5x5 = 25 sq ft. Two or three of them in the corners of the tent would heat a 4 x 8. If you have plenty of amps to spare then you can use any of the higher watt heaters. Electric oil heaters are nice just take up more space.