Any space heater with tip-over protection will be good and safe for indoor use.
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.
The Lasko 6000 Cyclonic Ceramic Heater is 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.
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.
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.
The DeLonghi DFH255OTB Safe Heat Fan Heater is a safe option
Lasko makes very good indoor space heaters that can easily heat a full bedroom.
There are a number of dangers related to indoor portable heaters. These include the risk of fire if the heater is too close to flammable material, the risk to air quality if the heater/room does not have adequate ventilation and the risk of burns from the heater itself.
There are several brands of Indoor propane lights that intend to exist in today's world however I will only name a few and the following indoor propane lights are, Mr Heater, Falks and many more. However the most popular would have to be Mr. Heater.
You should keep your indoor heaters several feet from the wall, or as far as you possibly can without moving it in the way of everything. You definitely don't want your wall to get too hot for safety reasons. At a minimum, make sure that you place your indoor heater three feet away.
form_title=Swimming Pool Heater Installation or Replacement form_header=11613 Please select the type of pool that needs to be heated*= () Above ground () Spa/hot tub () In ground What type of heater would you like to use? (Select all that apply)*= [] Natural-gas fired [] Propane-gas fired [] Electric [] Heat pump [] Solar heater [] Want recommendation Is the pool indoor or outdoor?*= () Indoor () Outdoor