Looking for a good heater...

Well the title says it all. For a 1.2mx1.2m.200m tent with next to no space.

Anyone ever used underfloor heating or is that just ridiculous? I've never owned no seen the stuff but am looking at this...

http://www.ebay.co.uk/itm/Underfloor-Heating-Film-Kit-optional-thermostat-/230873956231?pt=UK_Home_Garden_Hearing_Cooling_Air&var=&hash=item7b6c2cb0d7

actually this stuff seems better... http://www.ebay.co.uk/itm/Under-Wood-and-Laminate-Floor-Heating-150w-m2-Kit-Underfloor-Foil-Dual-Core-Mat-/271338000213?pt=UK_Home_Garden_Hearing_Cooling_Air&var=&hash=item3f2d014f55

yah it will work ..........but u need to check on the controls they are normally set for like 80 F .........that is going to be way to warm for the root zone u are looking for something u can have in the 67-73F......19.4-22.7C

for this to work u know it means flooring inside the tent ........the system is not ment for direct contact ......ment to have something buffering it (i go with cheap pathway stones ....u will lose your reflective and water proofing unless it is one with that detachable inner liner thing )

u might need to tweak the temp of it higher to get it to what u want tho those and that liner so just put a bag in there water it and turn it on tweak the temp until the soil is what u want then u can move the plants in safely ...........just understand this will raise the temp in the tent so u will need to increase our cool air intake and your exhaust