Lynnmor wrote:
1500 watts is about the maximum allowed in an electric heater, all of them will put out the same amount of heat. When choosing the brand or style, you just decide how you want to direct heat. If one is not enough, buy another if you have adequate wiring and power available.
To be clear, 1500W is the MAXIMUM ALLOWED FOR "PORTABLE" space heaters.
You CAN buy electric heaters higher than 1500W but you will need to install a dedicated circuit for it and directly wire the heater to it.
Once you go pass 1500W then the electric heater MUST be wired to a dedicated circuit just for that heater.
Typically though, wired electric heaters above 1500W will be 240V so won't work with any 30A 120V RVs.
30A 120V RV electrical service is your limiting factor in the equation 30A only gives you 3600W to work with, fridge uses 300W, converter uses some power, water heater with electric heating element if equipped takes 1200W and all of your electronic toys takes out wattage.
Typically only ONE 1500W portable space heater is all you are going to get away with.
Some enterprising folks will sneak out a extension cord to the campground shore box (making sure it is on a different breaker) in order to connect a second 1500W portable heater. If you do, make sure you use a 14ga or 12Ga extension cord and not the typical 18 ga cords folks tend to gravitate to..