Propogation heat mats, widely available online and Lowes/ HD, have been the answer to my low temps in a garage cabinet. Warm roots lead to very happy plants. I have also grown larger plants in 10 gallon smart pots with prop mats under the hot water heater overflow catch basins I use to hold a 10 0r 20 gallon fabric pot.
I think underheat is more effective than raising the air temps in cold rooms.
Underheat doesn't open the stomata the way environmental heat does.
That may be so, but raising the temp of all the mass of soil and plants will effectively raise the ambient air temp while also pushing the soil temps higher by a lot.
If all you do is blow heated air it will be immediately extracted by your fans.
Yes exactly, that's what I do, heat the lung room. That way the heat isn't lost by my extraction fans. It's recirculated.I doubt it's about ir wavelength, more about intensity.
What should be heated is the lung room, not so near the tent.
Cheers
I doubt it's about ir wavelength, more about intensity.
What should be heated is the lung room, not so near the tent.