On Demand Hot Water Heaters, as the name implies, only use energy to heat water when it’s needed, unlike traditional tank water heaters which store hot water for future use which can waste energy. Other names for On Demand Hot Water Heaters are Tankless Water Heaters and Instant Water Heaters. And because there is no tank, Tankless Hot Water Heaters use much less space while they save energy.
Tank Water Heaters run out of water when the hot water in the tank runs out. Once an On Demand Hot Water Heater is activated, it continues to heat your water as long as you need. Initially more expensive than traditional tank water heaters, an On Demand Hot Water Heater will use less energy and last longer saving you money in the long run.
Compare fuel costs for your area to determine which fuel option is right for your home. Take into account the amount of hot water you will need daily and how much the water will need to be heated.
Gas Tankless Water Heaters
Gas On Demand Water Heaters tend to have a higher flow rate, but because they use a pilot light which is usually on, they generally use more energy. An intermittent ignition can solve this problem for some models.
*require a flue for ventilation*
Propane Tankless Water Heaters
Because of its portability, propane works especially well for those living outside gas supply lines.
Using propane is generally less expensive than electricity.
Electric Tankless Water Heaters
Depending on an area’s energy rates, electricity is usually the more expensive way to run a water heater. As always, research and compare. Electric might be best for you, especially for lower hot water usage.
Styles And Options
When you look at tankless water heaters you will see you have various options. Some water heaters are meant to work for the whole house while others can be installed for just one appliance. Depending on the size and style of the tankless water heater you choose, it can be installed under a sink, in a closet or even hung on a wall.
Whole House Water Heaters are centrally located, this type is used to heat the water throughout the house. They work best in homes that only use 1-2 major water using appliances at a time. They won’t be able to keep up if the demand is too high.
Point Of Use Water Heaters are installed right where you need the hot water such as under the kitchen sink.
The water temperature will depend on the flow rate which is measured in gallons or liters per minute. If the flow rate is too high, however, the water heater may not be able to keep up with the demand.
If you use a substantial amount of hot water at one time, consider multipletankless water heaters. Certain high demand appliances such as the clothes washer could use their own dedicated water heater.