Are infrared heaters safe?
Yes, as long you use far wavelengths. Near wavelengths are usually used only for high-intensity activities, as repeated exposure may damage your skin, just as too long of an exposure to the sun can.
Where’s the best place to put an infrared heater?
Usually places that suffer a loss of heat, as HowStuffWorks.com points out.
Are they environmentally friendly?
It really depends on the type you get. Some heaters run on gas, while others run on electricity. Nonetheless, since they run quite efficiently, you’re sure to save up on either electricity or gas expenses.
Are they good for repeated use?
Again, as long as you use far wavelengths, you’ll be fine.