When using an emergency indoor heater, the best safety measures to consider are keeping the heater at least three feet away from anything flammable, never leaving it unattended, ensuring proper ventilation, using a carbon monoxide detector, and following the manufacturer's instructions carefully.
When using emergency heaters indoors, it is important to follow these safety precautions: Keep the heater at least three feet away from anything that can burn. Use only the fuel recommended by the manufacturer. Make sure the heater has a tip-over switch that will turn it off if it falls over. Keep the heater on a level surface. Never leave the heater unattended. Install a carbon monoxide detector in the room where the heater is being used.
The best indoor kerosene heater will depend on your specific needs and preferences. Some popular options include the Sengoku KeroHeat, Dyna-Glo Indoor Kerosene Convection Heater, and Heat Mate Indoor Kerosene Heater. Be sure to choose one that is safe for indoor use and meets your heating requirements.
Any space heater with tip-over protection will be good and safe for indoor use.
The Lasko 6000 Cyclonic Ceramic Heater is for indoor use.
Some of the dangers of using an indoor air heater are that in houses poor indoor air quality can result in a structural rot. Also, indoor air pollution may occur which is not very talked about.
The DeLonghi DFH255OTB Safe Heat Fan Heater is a safe option
Outdoor heaters need to be safe with different types of weather, so they would be different than indoor heaters. They are both effective, but never use an indoor heater outdoors.
Mr. Heater sells Indoor Safe Portable Heater that run on Propane Gas some of them are very small and can be easy held with one hand, the heaters should be consider very handy especially for people with RVs.
Indoor
Lasko makes very good indoor space heaters that can easily heat a full bedroom.
There are several on-line and regular stores where one can purchase a propane heater for indoor use. The following are a few of these stores, Lowe's, ebay, Amazon, Cabela's and your local gas company can help.
Yes, kerosene heaters are safe for indoor use, such as the Mr. Heater F215100 Portable Buddy Series, which is certified for indoor operation.