Steve Flynn wrote:with these you only need 6 watts per square foot of heater capacity. [...] So if you have 500 square feet of space you should have about 3000 square feet or 6 of these panels to cover the space. That is still significantly better than what electric baseboard offers.
Thank you for this, Steve!
I would like to understand your numbers... when you say square feet for the room, does that assume an 8' high ceiling? And I am guessing you meant 3000 watts for the panels instead of sq ft? So like 7 or 8 of the 400 watt panels for a 500 sq ft room? Or did I interpret that completely wrong?
A different question -- can these be used for short-term immediate heat, or do you need to keep them on for hours to "charge" the mass like under-floor radiant heat?
We have a 40 sq foot room with a shower, with 7' high ceilings. We were hoping to use a 400 watt panel to heat that when showering. We were hoping we could turn it on like 15 minutes before a shower. Is that realistic, or no?
Our camper is so tiny... the space where we were trying to keep our legs warm is only about 18 sq ft, and our feet and legs were a foot from the heater which sat on the floor. The camper is a popup so the walls are canvas above our sitting waist height, so it might not be a fair test... but I thought that was what these heaters should be good for; heating the objects in the room (our legs) rather than trying to heat up the air in a drafty space...
Any further insights would be so appreciated! Thanks again for your response.