Popular Instant Electric Water Heaters

Q. "Will an instantaneous water heater save me money on my utility bills?"
A. In many applications you can see a savings. There are some variables that could reduce the amount you save. One example is you will not run out of hot water, so longer showers could cut into your savings. Also, the cost of electricity, propane and natural gas in your area will affect the amount of money saved. The higher the cost for the energy type used to heat your water, the quicker you can recover the higher initial cost of installing a tankless versus tank style water heater.

Positives:

You will never run out of hot water. "You want an hour long shower? No problem!"
Electric units can be installed at the point of use.
You're not paying energy costs to heat water 24 hours a day.
They're easy to install.
Our electric units don't require a T&P valve (no tank!) - if code allows
Installing a tankless water heater can indeed be a bonus to the environment (why should we choose wastefulness when we're talking about finite natural resources?)

Negatives:

They all need a minimum flow rate & pressure to turn on.
The faster water flows through them, the lower the temperature rise. So, if you expect to take a shower while the clothes washer is running, you will need to select a unit sized to your maximum hot water flow requirements. (Gas units generally handle this a little better than electric models)
Electric units need heavy gauge wire. Example: the 9.5kw must have 8ga wire and a 50amp breaker.
Gas units need a much larger, special flue pipe and larger gas supply than a conventional water heater.
At times they can produce very hot water. It's easier to get scalded.
Gas units are more complicated than a conventional water heater.
With some brands, parts are hard to find (not a negative if you originally purchase from us, as we like to carry parts for the units that we sell).

Summary:
Tankless water heaters have their place. They're not "the answer" to every hot water need, but if they're used correctly they can be the solution to many of them.

Q. "On the electric tankless models; why should I buy the thermostatic model instead of the lower priced flow model?"
A. The thermostatic model has a number of advantages. A non-thermostatically controlled model's outlet temperature is dependent on the flow rate, and it can create a potential problem with anti-scalding valves and the like. When in doubt, please order the thermostatically controlled models. Also, the thermostatic models can have a warm or hot water source, but the non thermostatically controlled models are only designed for a cold-water source/input.

Q. "Are all Eemax tankless water heaters designed to be hardwired?"
A. Yes, every tankless water heater by Eemax is supposed to be hardwired when it's installed.

Q. "I have a pressure/temperature pressure balancing valve for scalding safety. Can I use all of the above instant heaters without worry?"
A. In that case never install a non-modulating heater such as the small electric tankless water heater model EX95. When ordering make sure to only order a heater that has a modulating valve and also it's a good idea to install an additional scald protection valve before your showerhead.

Q. "Is it possible to drain a tankless water heater to prevent freeze damage when not in use?"
A. Yes. Simply drain both lines 'to' and 'from' the unit. As long as there are no check valves in the way, that should drain the water from the unit. To guarantee that there is no water in the unit, we recommend two drain valves - one before and one after the unit - as well as blowing air through the water line.

Q. "If these units don't have a tank, how do they know when to turn on?"
A. The tankless water heaters have a flow switch built into them. When you turn on (open) the hot side of a faucet the water then moves (travels). Once the water is traveling at 3/4 of a gallon per minute or faster most tankless water heater switches will then turn on the gas or electricity.

Q. "What does it mean to have ANSI Certification for lead free plumbing products?"
A. Laws requiring plumbing products that come in to contact with drinking water to be essentially lead-free (0.25% weighted average) have been passed in California, Louisiana, Maryland, and Vermont. In order for companies to ship these plumbing products to locations in CA, LA, MD and VT, they must be ANSI certified lead free.

Q. "What is CA AB 1953, LA Act No. 362, MD HB 372, and VT S.152 and how is this different from previous low-lead legislation?"
A. The United States Environmental Protection Agency (EPA) regulates the amount of lead in drinking water under guidelines established in the Federal Safe Drinking Water Act (passed in 1974; amended in 1988 and 1996). This Act defines "lead-free" as not more than 8% lead in pipes and fixture fittings. PLEASE NOTE: Use of the term "lead-free" varies between the new legislation in CA (AB 1953), LA ( Act No. 362), MD (HB 372), and VT (S.152), and in the current Federal Safe Drinking Water Act requirements. In the new legislation for CA, LA, MD and VT only (as of Jan 2013), it will mean 0.25% or less (weighted average). Similar national legislation is scheduled to go into effect Jan 2014.

Q. "Your products specify the 'temp. rise' based on the GPM flow; what do you mean by this?"
A. Temperature rise is the amount the heater raises the temperature of the incoming water, based on the flow rate shown of that water.

Q. "Can I install tankless water heaters in my attic?"
A. Without seeing all of your plumbing piping, etc. it is difficult for us to answer with a straight "yes" or "no." One must be sure that a possible water siphoning condition can not be created as tankless water heaters should not have air in the lines. Water siphoning out of any brand of tankless water heater might damage the heater when there is no water (or not enough water) in the lines.

Q. "What do you mean when you say water purified up to 18 MEG OHM?"
A.18 MEG OHM water is considered to be the highest grade of purified water. 18 MEG OHMs (18 million ohms) are units representing resistance to the flow of electricity. The more water is purified the less it is able to conduct electricity because it contains no inorganic ions with which to carry electric current. Normal municipal or well water typically contains some sediments, dissolved metals, traces of organic solvents and sometimes deliberately added chemicals such as chlorine or fluoride. 18 MEG OHM water is normally produced in multiple stages in order to achieve such levels of purity. Typically water is put through ion exchange resins, activated carbon or other bed filtration systems, reverse osmosis and other filter systems needed to remove specific elements or impurities from water. Please note: Highly purified water is very aggressive because it becomes acidic with a pH close to 5. This means the pure water will attract ions from plastic, metal, or glass piping and containers causing them to eventually fail. This type of purified water is used mostly in experimental or chemical laboratories.