Space Heater Efficiency
Space heater efficiency is normally at its best as you utilize your outdoor space for heating during cooler months. You can have a wide range of different types of energy efficient space heaters that have proven space heater efficiency. This include electric heaters, propane heaters and natural gas heaters.
Electric heaters
Electric heaters can be mounted to walls or ceilings and use infrared heat, like the sun. The smaller portable heaters can be placed anywhere you need warmth. The strip style heaters that are mounted out of reach come in a range of lengths which allow you to customize your heaters for your specific space.
 420,000 BTU Kerosene Space Heater US $2,000.00 
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 Fostoria Electric space heater US $650.00
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 Pioneer Trekker Portable Space Heater Oil Fired US $575.00
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 QUIET ONE KS2010 HYDRONIC KICK SPACE HEATER 11200 BTU US $232.00
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These types of heaters range in wattage from approximately 1500 watts to 4000 watts. The higher the wattage, the more powerful the heater. The advantage of electric heaters is that they require less space for ceiling and wall clearances
Propane heaters
Propane heaters are self contained units fueled by propane gas tanks. These heaters provide heat by burning propane gas and radiating heat off of burner grids located at the top of the heater. These heaters can radiate heat out to a diameter up to around 20 feet. The higher the BTU's the more powerful the heater. There are several models with built-in wheels making its handling easy. The ceiling clearances for propane heaters are namely around 18 inches.
Natural gas heaters
The main advantage of gas heaters is that, unlike propane tanks, they are directly connected to gas lines and requires no constant checking and refilling. As they are permanently mounted it needs professional installation.
Overall, all these types render top space heater efficiency