They opposite sex.
The question is better defined as "What the most energy efficient portable heater?" Because one would assume that you will want to be able to take the heater with you when or if you move.
A 40 gallon heater is most common and economical for 4 people . These are 48-49 " high and 16" -18 diameter.
Most car heaters do not exceed 300 watts.
"economical" has no comparative or superlative form. You would say "more economical" or "most economical."
Home heater systems can be both gas and electric. The most common options are a fake fireplace, a portable space heater or just a plain old heater routed throughout the house.
You can get portable gas heater from Canadian Tire, Sears, The Bay. Most home renovation store have them, such as Home Depot, Home Hardware, Rona and Lowes.
Vornado is the brand of heater that is the most energy efficient. If used properly, Vornado heaters can heat just as well as a larger heater, for a much lower cost. They are small, portable, and can heat large rooms. Some of them even have thermostats or timers to increas efficiency.
A Honeywell heater is most typically used to heat a small space. They are portable units that provide a large amount of heat with a small amount of energy output.
The most economical transportation in Spain is the bus system. Trains are also inexpensive.
The most expensive hats are hand shaped in black leather, the most economical is tan suade
One can purchase a kerosene heater in most building supplies and DIY stores. They can also be found online from Lowes, Home Depot, Amazon and eBay. Care should be taken to use them in well ventilated spaces only.
Some of the popular brands of portable toilets are: The Coleman Portable Flush Toilet, Thetford Porta Potti, Visa Portable Toilet and Satellite Portable Restrooms. The most popular brand of portable toilets is the Porta Potti. This is the most popular that is used in many different events and places that need portable toilets.