Truths of Tankless Water Heaters

Posted by on Jan 28, 2014 in Tankless Water Heater Repair Charleston SC, Water Heater Repair Charleston SC | 0 comments

There is a lot of talk about the advantages and disadvantages of tankless water heaters verses storage tank water heaters. Water Heater Repair Charleston SC is going to start a discussion on tankless heaters today, pointing out some of the claims and discussing the realities. They have benefits and drawbacks over traditional water heaters and it could simply depend upon exactly what ones particular usage requirements are that will determine which kind of the right one for ones house. Water Heater Repair Charleston SC

The basic theory of utilizing a tankless water heater is one of being energy efficient. Water is heated as it is used, and not saved in the large tank of a conventional water heater, continuously heated so it is all set whenever it is to be utilized. Also, since they can hold on the wall and use up essentially no space at all, they are extremely useful.

Electrical Usage

Considering that tankless water heaters do require 240 volts of electricity and approximately 160 amps to establish, one could need to have ones electrical box updated to accommodate the power need of the unit. As an example, and not to obtain excessively technical below, a traditional tank water heater has around a 4500 watt heating element, verses 4, 7000 watt elements of a whole-house tankless one.

As for efficiency, According to the Partnership for Advancing Technology in Housing (PATH), and supported by Housing and Urban Development (HUD), “further testing is needed to determine if electric tankless water heaters will match the efficiency of tank-type heaters.”

Proper Sizing

Tankless systems are sized by the flow rate measured in gallons per minute (GPM). One will should identify when and what ones greatest need of hot water is to properly find out the very best size device to get.

Here is the formula for figuring this out from Keltec Inc:

Flow rate (GPM)
Temperature rise ( T ºF)

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To determine the size and kilowatt rating you need, apply this formula:
“The result of this formula is the maximum kW needed to accomplish your project requirements for on-demand heated water. Other media will vary slightly. This formula is a nearly universal method of calculation for energy input to yield temperature at required water flow.”

Water Quality on the Tankless System

The quality of the water one has at home should be analyzed also in order to get the most from a tankless water heater. If ones water is high in mineral material, like calcium, they will build up on the coils gradually and minimize the life span of the unit. If the water hardness at ones home is above 11 grains per gallon, a water softener would be recommended. Makers do have de-liming instructions and typically have a warning light on the system to recognize when this must be performed. Nonetheless, keep in mind what the makers guarantee covers. If it is simply against maker’s defect, this will not cover any repairs required due to ones water quality. In ideal conditions, a tankless system will last much longer than a standard water heater, which can assist validate the greater initial product expense and installment costs, but one will require to be watchful of keeping it running properly to earn back ones financial investment.

Service and Repair Costs

These costs are usually higher for a tankless system than a conventional water heater, just to have a heads up. Many individuals generally do not have their conventional water heater services too routinely (unfortunately) but it is suggested to have a tankless system skillfully serviced once a year.

Instantaneous Hot Water

This should not be that huge of a deal, but though makers do promote instantaneous hot water. Clearly one understood that it takes a minute for the hot water being heated immediately to go through ones hot water pipe to the faucet or shower. Though, if one is simply turning on the faucet a little the tankless heater’s burner might not fire up if the faucet is not opened up more. As an example, a flow rate of .5 gallons to 2 gallons per minute is required for electric tankless heaters to heat water.

Depending on the quantity of hot water one needs at the exact same time, more than one device will should be set up. This is easy to do, but clearly increases the equipment costs at the same time.

Devices and Set Up Costs

A typical price range for tankless heaters is around $800 to $1200. A typical tank water heater it is around $300 to $500. Set up costs are about $1200 and $300 respectively then too. One will, again, most likely need an electrical upgrade, along with a different gas pipe setup (if utilizing a gas tankless heater), and a brand-new ventilation system. An advantage of replacing ones water heater with a system much like the existing one is many of these upgrades will not be required – they are currently st up.

Benefits of Going Tankless

No stored water, which in itself has a number of advantages. Initially, if there was to be a leak with a tank heater, there could potentially be water damage to ones home. Also, one ought to flush the tank a minimum of as soon as a year to keep mineral build up low, but there is the capacity for smelly water odor, bad tasting water, and the development of legionella bacteria in the tank if it is not at a sufficient temperature level. Conventional water heaters take up far more space also.


Here is what Consumer Reports has found: “Gas tankless water heaters, which use high-powered burners to quickly heat water as it runs through a heat exchanger, were 22 percent more energy efficient on average than the gas-fired storage-tank models in our tests. That translates into a savings of around $70 to $80 per year, based on 2008 national energy costs. But because they cost much more than storage water heaters, it can take up to 22 years to break even longer than the 20-year life of many models. Moreover, our online poll of 1,200 readers revealed wide variations in installation costs, energy savings, and satisfaction.”

The Center for Energy and Environment says that “A 37% savings of water heating energy per household was found for replacing a typical natural draft storage water heater with a tankless one. However, this savings was not enough to offset the high incremental cost resulting in paybacks from 20 to 40 years.”

Finally, the National Rural Electric Cooperative Association concludes that “Tankless water heaters generally aren’t as energy efficient as well-kept tank water heaters. Insulation, temperature setback, timers, and heat traps can all lower energy costs with tank water heaters.”

One indicate is that indeed, tankless systems will use less gas than a conventional gas water heater which does have its environmental benefits. Nonetheless, a great deal of electrical energy is used, for electricity takes longer to heat up water than gas. And, the majority of electrical power is produced from burning fossil fuels.


As with any sort of technology, the field of water heating is ever developing. Efficiency advances are happening with conventional gas and particularly electric storage type water heaters. There are different advantages with tankless and traditional heaters that one will require to think about. Do not be reluctant to let Water Heater Repair Charleston SC know of any concerns you might have in the choice process.

Check out our Tankless Water Heater Repair Charleston SC page too!