For most homes, a solar hot water system may be the most efficient and economical to operate. If that's not an option, here are other suggestions. That will depend on energy prices in your area. Generally, natural gas is the cheapest way to heat water, followed by electricity, with propane being the most expensive.
A gas water heater is a tank that heats water from a gas burner located at the bottom of the tank. The hot water starts at the bottom and rises upwards, where it is extracted from the top by means of a discharge pipe. Rheem 18kw Tankless Electric Water Heater RHEEM 13kw RTEX-13 Tankless Electric Water Heater Both electric and gas water heaters generally require permits and inspections. Electric water heaters are easier to install because electricity is present in every home; gas often does not.
Electric water heaters offer a larger size range than gas water heaters, especially when considering micro-sized point-of-origin (instantaneous demand) water heaters. Point-of-use electric water heaters range from two to 20 gallons. Conventional electric tank water heaters start with 40 gallons and a maximum of 120 gallons. Most tanks are 30, 40 or 50 gallons.
Since there are no gas water heaters at the point of use, they are all tank models. Gas water heaters start at 20 gallons and reach up to 100 gallons. Most tanks are 40, 50, 80 or 100 gallons. Electric water heaters are less expensive to buy than gas water heaters.
While it is always possible to buy expensive water heaters in electric or gas models, if you want a cheaper heater, it will usually be electric. Electric water heaters are safer than gas water heaters because there is no gas line, burner or pilot light. Electric water heaters require a 240 volt connection for installation. Electric water heaters never need to be turned back on.
Gas water heaters require a gas line and an open flame (at the bottom of the heater) to heat the water. Occasionally, the user has to turn on the gas pilot light again with a lighter or a built-in piezoelectric lighter. Gas water heaters have a faster initial heating rate and recovery times than electric water heaters. With heating rods running from top to bottom, electric water heaters distribute heat along the height of the tank.
But heating rods heat up at a much slower rate than with gas models. The open flame of a gas water heater burns more than the rods or electrical elements of an electric model. In addition, the location of the burner is more efficient, since it is located at the bottom, the heat increases. Gas water heaters cost less than electric water heaters, about 33% less.
Electric water heaters heat water more efficiently than gas heaters. While an electric water heater heats water more slowly and costly than gas models, it heats water more efficiently. The heating rods are immersed in the water in a sealed tank, so there is very little heat loss. Although gas water heaters get hotter, they are less efficient than electric water heaters because much of the energy production is wasted through the top vent.
The vent is needed to discharge toxic gases. Because of their cleaner operation, electric water heaters last a little longer than gas water heaters. Electric water heaters can last two to three years longer than gas water heaters. Electric water heaters usually last 10 to 15 years.
Gas water heaters typically last eight to 12 years before they need to be replaced. Electric and gas water heaters are roughly comparable in terms of their impact on the environment, with no clear winner between the two types. Electric water heaters cover the best and worst types of electricity supply. At best, although still rare, it is electricity supplied by solar or wind energy.
In the worst case scenario, electricity supplied by dirty coal-fired or nuclear power plants. Some areas may have a larger supply of clean, low-cost electricity, while others may not. If the electricity of an area is supplied by modern and efficient hydroelectric power plants, then an electric water heater would be a good environmental option. Gas water heaters occupy the middle range by environmental impact.
Gas is never as bad as electricity supplied by coal-fired power plants, but never as good as wind or solar energy. Gas is a non-renewable fossil fuel. While gas has long been considered a cleaner type of energy than electricity, more recently some regions have enacted measures to prohibit the use of natural gas. Based on local utility costs, gas water heaters are usually cheaper to operate than electric water heaters.
They also cost more upfront than an electric one. However, depending on energy savings, gas heaters usually compensate for the price difference in about a year. Although you usually pay a little more for models with a longer warranty, we have found that they tend to have larger elements or burners that can speed up water heating and have thicker insulation for less heat loss. The disadvantage of a more environmentally friendly electric heater is that if the power is cut off, so does the hot water.
Since water heaters usually come in large sizes, installing some of these models may require the help of a professional. A solar water heater system consists of a storage tank containing water and solar collectors that generate heat. Tankless models are best for homes that use natural gas to heat water; electric models may require an expensive upgrade of the house's electrical capacity. Although scale can shorten the life of the heating element, there is no need to invest in sophisticated features to get a durable water heater.
These coils fill with water the moment you need it, offering almost unlimited hot water for your home. Therefore, gas heaters need ventilation and take up more space than electric water heaters, which limits their placement in a house. They work by using ceiling-mounted panels that transfer energy through a closed-loop system that connects to the water tank which then heats the water. One of the best Rheem water heaters available, this unit's 50-gallon capacity can provide hot water for a four year old home.
Here you will find basic information on how they work, if a tankless water heater might be suitable for your home and what criteria you should use when selecting the right model. Tankless water heaters, also known as instantaneous or on-demand type water heaters, provide hot water only when it is needed. We compared the results with those of conventional Rheem tank heaters, one gas and one electric, as well as with an electric water heater with Rheem heat pump, which is a variation of a water heater with tank. Also, keep in mind that gas water heaters take up more space due to the pipes and ventilation ducts they require.