Unvented gas heaters are designed for supplemental use only. Do not use unvented heaters in bedrooms, bathrooms, or confined spaces. Provide adequate ventilation, as required in the owner's manual. If the home has weatherstripped doors and windows an outside air source will likely be required.

Is it safe to use a gas heater indoors?

Indoor gas heaters are very safe when properly maintained and used as instructed. ... Major brands make quality indoor gas heaters so Paloma, Everdure, Calor (UK) and Rinnai gas heaters are normally safe in the home when well maintained. NEVER use an outdoor gas heater indoors, as they are not designed for safe inside use.

Are ventless gas heaters safe?

There are safety concerns, and building scientists point out that ventless heaters can damage homes if they're not sized or used correctly. ... Ventless heaters exhaust 100 percent of their combustion products into the house. This means chemicals like carbon monoxide, nitrogen dioxide and water vapor enter the house air.