does a tankless water heater require an expansion tank?
537115
Most tankless water heaters (electric or gas) do not need a thermal expansion tank. ... This creates an open plumbing system that does not require a thermal expansion tank to control thermal expansion. When the hot water tap is turned off, the plumbing system is closed.
328347
A tankless, gas-powered water heater is a good way to have some of the best of both gas/electric and tank/tankless worlds. ... Using gas makes the tankless heater more energy efficient as well, saving up to $1,100 a year and 1,100 gallons of water a year at the same time.
165225
Electric tankless water heaters also cost less to install than gas units. The installation costs for electric systems range from $800 to $1,500, while installation for gas units cost between $1,000 and $1,500. Gas water heaters require venting to prevent the buildup of harmful gases inside the home.
1444185
Tankless water heater do not have anode rods as they do not have a holding tank meaning they pair very well with soft water. ... Also in order to power an electric tankless, you need to have additional electrical work done. The power to run a standard electric water heater tank is not enough to power a tankless.
386690
Most tankless water heaters have a life expectancy of more than 20 years. They also have easily replaceable parts that extend their life by many more years. In contrast, storage water heaters last 10–15 years.
1391516
In short, yes, acid water will damage a tankless water heater and anything else metal connected to the water system over time." A water softener is a good choice for tankless water heaters and if you decide upon that method make sure that you set it so that the water has ZERO hardness.
620081
Tankless water heaters save money in the long run, but initial costs are higher than tank models. ... The U.S. Department of Energy estimates gas-fired tankless heaters save an average of $108 in energy costs per year over their traditional tank counterparts, while electric tankless heaters save $44 per year.
209422
Unlike gas tankless water heaters and gas traditional tank style water heaters, electric tankless water heaters do not require any venting. This is often one of the deciding factors when choosing whether you should purchase a gas or electric tankless water heater.
825105
The reason that some heaters need to cope with this expansion is that when water is heated, it expands. If this is not allowed for then heater tanks or pipes will fracture and split, causing a catastrophic failure of the heater. ... So you only need to consider an expansion vessel if you have an unvented water heater.
1006418
The reasons a tankless water heater can leak are really the same as the tanks. ... When installed properly by a good professional, a tankless water heater should last 15 to 20 years, compared to about eight to 12 years for tanks. And, many will never leak at all, just like the tanks.
387145
According to Energy.gov, “For homes that use 41 gallons or less of hot water daily, demand (or tankless) water heaters can be 24% to 34% more energy efficient than conventional storage tank water heaters.” Tankless water heaters (if gas-fired) will save homeowners over $100 annually the longer they remain in service.
163212
Average price for a tankless hot water heater ranges from $1000 – $2,800. Tankless water heaters are often a bit more complex to install and generally require additional piping around the unit. Be sure to factor in the installation cost in addition to the initial cost of the unit.
236853
The Home Depot offers traditional water heater tanks and modern tankless units, both powered by either gas or electricity. Depending on your selection, the average cost for water heater installation is between $1,000 to $3,000.
1338783
The cost to install a new water heater ranges from $400 to $900 for a 40 to 50-gallon tank, and between $1,470 and $2,510 for a tankless. Also, most plumbers will charge between $250 and $500 to take the old water heater out and properly dispose of it.
573470
However, although gas-fired tankless water heaters tend to have higher flow rates than electric ones, they can waste energy if they have a constantly burning pilot light. ... If you purchase a model that uses a standing pilot light, you can always turn it off when it's not in use to save energy.
211948
An expansion tank usually has a much smaller inlet hole than a pressure tank. But if it has a full open 3/4" port it can work as either an expansion or a pressure tank.
1436524
System boilers include a pump, which means it responds quickly and has more economic running costs. System boilers don't require a feed and expansion tank, or a cold water feed tank as they can be used with pressurised cylinders.