Propane are the best, they throw out a lot of heat
the New Solar Comfort Metal Infrared Electric Space Heater by Sun Cloud is supposed to be effiecient.
Lasko space heaters use about 800 Watts and are very energy efficient, along with being very powerful.
There are various companies whom make electric boilers. Precision Boilers, Electric Heating Company, and Thermaflow Heating are to name just a few of the companies in which one may find a company that makes electric boilers. It is possible for one to contact the local electric company to inquire if they are a qualified agency that makes electric boilers.
This would depend on which country you live in, some have no companies and others may have up to twenty.
There are some companies who make electric blankets that are designed for children.
Ariston and Powerstar make excellent, small, electric water heaters that would be good for a cabin. They start at $150 and go up from there. Ariston is consistently rated 5 stars.
Pediatric wheelchairs are made by a number of companies. Electric ones are made by companies like Invacare and can be used by children of six or older.
The following companies make electric bed warmers: Serta, Sunbeam, and ChiliPad. These bed warmers are a great way to stay warm on a cold night. However, be careful of the dangers of electricity.
By themselves electric baseboard heaters are not safe for pets or babies because they can get hot to the touch and even burn someone who touches them. You can purchase covers for electric baseboard heaters that would make them more safe for pets and babies.
There are many companies that offer electric drum kits. The most famous manufacturers are Yamaha and Pearl. Other well known companies are Simmons, Korg, Roland and HXM.
It depends on the power draw of each electric heater. Make sure to check the amp rating of each heater and ensure that the total amperage of all three heaters does not exceed the circuit's 50A capacity to prevent tripping the main breaker.