The most energy efficient pool heaters are solar heaters. You can find solar pool heaters made by Vortex, SunHeater and EcoSun amnong other companies. For non-solar powered you will want to check out pool heaters by Hayward and Pentair.
Pool heaters come in several different models. Electricial heaters, propane powered heaters and solar powered heaters are the most common.
LPG makes many different types of gas heaters. For the most part, LPG makes liquid gas heaters, with their most popular heater being central air heaters.
Lasko space heaters use about 800 Watts and are very energy efficient, along with being very powerful.
nasa.
Volkswagen makes several models of cars that are sold. Some of the most popular models sold in America are the Jetta, the Passat, the Golf, and the Bug and Bug Convertible.
The most efficient oil heaters on the market today are typically those with high energy efficiency ratings and advanced features like programmable thermostats and timers. Look for models with a high Annual Fuel Utilization Efficiency (AFUE) rating for optimal efficiency.
Lasko heaters come with a one year warranty, along with most other heaters on the market.
Quartz Heaters are unique in a number of ways. Most notably, the design of these heaters is such that it is more efficient than ordinary heaters. This allows it to deliver more heat for less cost.
The GMC Terrain is their most efficient model at 22mpg. They make three hybrid models which all get 21 mpg. However the hybrid equipment makes these models quite expensive.
The most energy-efficient options for home water heaters are tankless water heaters and heat pump water heaters. Tankless water heaters heat water on demand, reducing standby energy loss. Heat pump water heaters use electricity to move heat from the air or ground to heat water, making them more efficient than traditional electric water heaters.
Most are not safe. some have a safety feature that makes them safe. They turn off if fumes get to high. Read the safety instructions.
base board heaters,teey are natural draft.keep them on the outside walls