Suitable for zone heating and is clean burning and inexpensive to operate.
Uses an oxygen depletion sensor (ODS). This device shuts off the heater and the flow of gas to the burner if the oxygen level in the room becomes inadequate. An ODS is required on all unvented heating equipment.
Infrared-type heaters of this type use a ceramic radiant or panel that is positioned above the gas burner. The ignited gas gives off a bright orange glow to produce heat. A screen-like guard protects the radiant plaques but they are not otherwise enclosed.
Convection-type heaters of this type first warm the air, which then warms the objects. Has burners enclosed within a painted or enamel-coated sheet metal housing that has air openings on the top, front and possibly the sides.
DIY Frequently Asked Questions / Non-Vented Gas Heater')">
Requires no outside vent.