ventless propane heaters have come a long way, and are not a worry....my greenhouse in nc used a ventless propane heater and never had a problem...I have the same type heater in my little gh now, using natural gas, here in tex...
as far as a heat mat for grown plants, I wouldn't bother....I use one for rooting cuttings or seedling sprouting in the spring, but I never have used it on grown plants....except once last year when the gas was interrupted...then I piled all the orchids on it!
when I use the light setup that I have, it is indoors, do I don't worry about ANYTHING....if the air feels good to me, its ok for the plants....there is a 2' x 4' gravel tray under them, and the overflow pan is mostly full...the cats love it!
running a humidifier to those % can really be harmful to your house...nasty on sheetrock and finishes on wood....I don't rent so I surely don't want to destroy MY house for some plants....if you rent, even worse! they make humidifiers for your furnace, but they are pricey and, again, you don't want to steam your interior! my interior % is between 20-30 indoors sometimes less, texas is tough on orchids! (and my skin)
you can buy one of those plastic little gh's or build your own...that is one solution...big deep gravel tray in the bottom...
|