Space Heaters: What To Look For

The most important thing to remember when looking for a space heater: Nearly all units produce the same amount of heat, and the differences lie in safety features, convenience features, reliability and the way the heat is directed. Most electric space heaters are 100 percent efficient in converting energy to heat. Convection heaters typically have a maximum of 1500 watts – usually with a lower 750-watt setting as well. This means that at the high setting, an electric heater can produce 5,100 Btu, and at the low setting, 2,550 Btu. Experts estimate that providing heat on a very cold day to a well-insulated room with an 8-foot ceiling requires about 10 watts (or 34 Btu).

Most electric space heaters come with temperature controls and protective grilles, but experts say to also consider the following features:

• Look for the Underwriters Laboratories (UL) mark. This indicates that the electrical-certification group has tested the model for possible safety problems.

• Avoid overloading circuits. If a heater plug or wire gets warm, this can be a sign of a problem with the wiring in the outlet or circuit.

• Opt for automatic shutoff. This feature, which means the space heater should automatically shut off if it tips over or overheats, is essential.

• Radiant or convection? A fast radiant heater will warm a small area quickly, or for short times, and the slower, steady heat from a convection heater, is better for heating larger areas.

• Check the lights. Owners often report that even small LED lights on heater controls are bothersome at night, and some heaters have brighter display lights than others.

• Location is key. Different heaters are best suited to different spots in a room. For example, models with fans may have air intakes angled or on the sides, and they can be placed flush against a wall. Some flat-panel heaters can mount directly on a wall, some convection heaters perform best when placed in a corner and still others work best in the center of a room. Only a few electric heaters are designed for use in a bathroom, laundry room or any other wet area.

• Extra technology can be convenient. Products with timers, digital thermostats and remote controls are all more convenient, and users seem to like them in reviews. Many owners who don't have these features say they wish their heater had them.

There are two main types of electric space heaters: radiant and convection. Here are the key differences: