The DeLonghi DFH255OTB Safe Heat Fan Heater is a safe option
Any space heater with tip-over protection will be good and safe for indoor use.
Yes, kerosene heaters are safe for indoor use, such as the Mr. Heater F215100 Portable Buddy Series, which is certified for indoor operation.
Lasko makes very good indoor space heaters that can easily heat a full bedroom.
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.
Lasko makes very good indoor space heaters that can easily heat a full bedroom.
The Lasko 6000 Cyclonic Ceramic Heater is for indoor use.
Lasko makes very good indoor space heaters that can easily heat a full bedroom.
KEROWORLD
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.
There are several indoor electric grills which are easy to clean because of their removable plates. The Cuisinart Griddler GR-4N has received the highest reviews for indoor electric grills. George Foreman makes an indoor grill with removable plates that are dishawasher safe.
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.
Generally no indoor fireworks are deemed "safe", but some are much more manageable and tame than others, such as small four inch firework fountains, or indoor sparklers.