In 2015, the United States government introduced new energy efficiency regulations for the water heaters sold in the country and made it mandatory for manufacturers to ensure that the heaters they sold conformed to the energy-related efficiency requirements.
The national appliance energy conservation act (NAECA) was introduced in 2015 and is administered by the Department of Energy. Since water heaters contribute to 20-30% of the energy bill of most households, the water heaters used in homes and elsewhere should conform with the requirements specified in NAECA.
A majority of homes in the US have conventional tank water heaters which are more inexpensive, easier to install, and can supply hot water to a number of bathrooms in the house at the same time. However, these water heaters are not very efficient, as heat is lost when the hot water is stored in the tank, so more energy is required to keep the water hot. So to reduce energy wastage, the new rules stipulate that the efficiency of the water heaters should be more than .82, so the heater manufacturer should take steps to increase the efficiency, usually by increasing the insulation for the water tank. Tank-less water heaters use heat exchangers and produce hot water only on demand, so they are more efficient compared to the more popular heaters with a storage tank of hot water. So most of these water heaters available on the market conform to the regulations for water heaters, as their energy efficiency is higher than the stipulated minimum of 0.82.
So homeowners and others who have already installed these heaters(www.besttanklesswaterheater.review/) will not have to spend their time and money in ensuring that their heater complies with the new government regulations. However fewer water heaters without a storage tank are sold, as the cost of these heaters is twice or thrice the heaters with tanks, of the same capacity. The expenses involved in the installation of these heaters is also higher as the piping has to modify accordingly. Usually, a water heater has a limited life and has to be replaced within 10-12 years. It is simpler and less expensive to replace a heater with a storage water tank, with a new model, compared to replacing the tankless heater for water, as the heating and water piping system for this heater is more complicated. Most of those who are planning to install a tankless heater, will read more about the various models of water heaters available and check the heater review, before finalizing the most suitable heater available. Some of the considerations while selecting a water heater are the number of people living in the house and the time when the hot water will be required.
Most of the tankless heaters can be used to supply hot water to only one faucet in the house at a time, so if other people also require hot water at the same time, they will not be supplied the heated water. It is possible to install larger capacity heaters for supplying heated water to multiple faucets simultaneously, however, these will be significantly more expensive compared to smaller heater models.