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Looks like a pretty good idea, but $82 for a replacement bulb??!!! We are thinking about a free standing patio propane heater for our yet to be built 12' by 18' screened in porch/spa room.http://www.patioheaterstore.com/patio-heaters/free-standing-patio-heaters/shop.cfm?kwid=propane%20patio%20heater&N=408+4294835865&source=overture
4,000 Btu (electric) Vs 40,000 Btu (gas)...go for the latter. I use a 30,000 Btu tank-mounted infrared unit in my garage, and on cold camping trips. Works great, just like standing in front of a fire.
Same here for doing without. You do have a few minutes after getting out of the water to get a towel and or robe on, and get into the house. I've done it in below zero weather. If it's really windy and that cold, it's another story, but then I'd probably not go out to the spa that night.
... one said his hair froze. thats weird.