The first thing you have to ask yourself is “Do I need hot water around the clock?” If you do, then there are other things you should think about before letting yourself be convinced that an electric tankless hot water is a necessity for you.
The total cost of acquiring, installing and using them can be very considerable. Depending on the type, brand and capacity of the electric heater, the total cost of acquiring and installing it would probably cost you up to $1,500 to $2,000 or even more. Almost all electric tankless water heaters that are configured as whole-house water heaters require professional plumbers and electricians.
Next is the cost of using one. Having hot water around the clock and on demand can be quite expensive in the long run, and if you are not really that well off you might be a little bit more careful about letting yourself be convinced into buying an electric tankless water heater.
Sure, manufacturers will tell you about all the benefits of getting hot water when you need it, energy efficiency, saving on storage space and all that jazz, but inevitably your electric bill will only go higher than before. In the end, you have not really saved on anything.
Further, you can’t be sure if the efficiency rating is actually what it was advertised to be, and even if it was, it is probable that it would take the entire useful life of the unit before the savings that you supposedly have accumulated match the total amount you paid for the unit.
There is also this promise which makers of electric tankless water heaters make to prospective customers, and that is hot water each time you turn on the faucet, hot water on demand. The thing is this is not necessarily 100% accurate.
There is actually a waiting time, and the farther the tankless water heater is from the faucet or the shower, the longer it takes for the water to be hot enough. This is ironic because the reason for this is the fact that the heater is tankless, no hot water is stored.
When the faucet is turned off, the water between the heater and the faucet is not heated. Water only starts to get warm after you turn the faucet on, and the first gush of water will actually be normal temperature only, if not cold. It seems that the only way by which hot water will run down the faucet each and every time is if you install the electric water heater near all the faucets and shower heads. And this is, of course, ridiculous.
Further, if you use an electric tankless water heater to accommodate several sinks or showers, then the longer it will take to get the temperature you need, not to mention the heat radiated off the pipes between the heater and the sink or shower.
Another cause of possible disappointment for you is the mistake of having installed a water heater that is not compatible with the place you live in. You may ask “what does that have to do with anything?” Some electric tankless water heaters are configured to work effectively only in places with moderate to warm climates. Apparently, some electric water heaters can only handle so much cold water coming into function effectively as a water heater.
In conclusion, despite all the good things being said about electric tankless water heaters, be they portable or whole-house heaters, you should first think that these are all parts of making you focus on the possible benefits you could receive.
There could be a lot of room for disappointment if you don’t read reviews and learn about other people’s actual experiences with the product.
It may also appear that electric tankless water heaters are the future of endless hot baths, but don’t disregard the fact that tank heaters are not at all rendered obsolete by the presence of these kinds of heaters.
As a matter of fact, there is an advantage that electric tank heaters can provide that tankless heater cannot, and that is hot water on demand. The reason for this is hot water is already stored. Ironically hot water on demand is a promise made for tankless water heaters.