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A typical Electrical water heater works on a simple mechanism, a electric heating unit is connected to a 220- volt circuit. To warm up the water, the current is allowed to pass through certain electrical-resistant heating element which is fixed in the middle of the tank. Power is delivered through a thermostat, which controls the water temperature.

Patio heaters produce heat one of two ways. They either burn a fuel like propane or natural gas, or they heat an element using electricity. Unlike a space heater that contains a fan, patio heaters warm the area around them by using radiant heat.

According to The Department of Energy and industry standards, the only way to properly size a home heating or cooling system is to complete a Manual J heat load analysis. This takes into account many factors such as size and structure of the house, climate, air infiltration, the number and type of windows installed, insulation, appliances, and even

Propane and natural gas outdoor patio heaters are only to be usedoutdoors (outside any enclosure) where there is fresh air ventilation. Outdoor patio heaters that use gas are not to be used inside a building, garage or any other enclosed area.

Based on a 40,000 BTU rating, an outdoor gas heater that operates on liquid propane will cost on average $1.60 per hour to operate. This is based on the operation of the outdoor gas heater itself as well as the average cost of filling thepropane cylinder which is about $16 to fill a standard 20lb. cylinder.

The modern tankless water heaters are much more energy efficient than the traditional ones. A tankless water heater heats water only at the time it is being used. Therefore, the energy is consumed only at the time when the heater is on. On the other hand, in the traditional water heater setup, water is stored in a large tank. When the water in the