Electric Patio Heaters
An electric patio heater is one of the best all around heaters for you patio, porch, or deck. The biggest advantage of electric outdoor heaters is that you can actually use many of them indoors as well (Be sure to check with each model).
Patio heaters such as propane heaters aren't made for use inside enclosed porches, but an electric heater can be used safely either outside or inside the enclosed patio environment making it a more versatile heater.
Another advantage of electric heaters is the smaller clearance requirements. Since electric heaters are generally radient, heating the area they are pointed at versus the air around them, they can be near objects and point their heat towards the area you want to heat.
With an electric patio heater, you also have one less thing to worry about when planning a party or opening up your restaurant that day. The power supply is always available since it's electric. You don't have to make a special trip to go get the fuel source if it's running low.
Other Models of Electric Patio Heater
While many people opt for the traditional cylinder shaped patio heater, electric heaters come on many more models.
Ceiling radiant heaters are a popular choice. They can be mounted to the walls or ceiling of your patio. Basically, it's an out of the way solution to your heating needs. These units are thin and wide, so they really don't take up much wall space. You can also use a shop or garage heater in it's place.