Good, but expensive to operate.
Yes, the tankless water heaters do cost more than the normal water heaters because tankless water heaters are designed to supply hot water only when needed unlike normal ones.
Tankless water heaters are available at most hardware/construction retail stores or online stores. Tankless water heater are much more expensive than regular water heaters.
To find reviews for tankless water heaters, one could check out ConsumerReports, as well as sites that sell tankless water heaters such as Home Depot and Amazon.
While tankless water heaters are significantly more efficient than traditional water heaters, it can take up to 22 years to break even on the cost, due to the initial expense of the tankless water heater itself. Unfortunately, by the time the tankless water heater starts to pay for itself, it will likely have exceeded its 20-year lifespan. http://www.consumerreports.org/cro/appliances/heating-cooling-and-air/water-heaters/tankless-water-heaters/overview/tankless-water-heaters-ov.htm
Tankless water heaters have been around about 30 years. I believe they may have first been used on European trains.
Titan tankless water heaters can be purchased online at Tank the Tank, Hot Water, Local, Amazon, eBay, Titan, Titan Water Heaters, and Tankless Water Heaters.
The purpose of tankless water heaters is to provide a continuous flow of warm/hot water to various faucets in the house. It does this by warming the water on demand, and not storing it.
Tankless heaters INC.
Tankless water heaters are produced by a wide range of manufacturers. The Rheem tankless water heater has a cost range from the mid fifteen hundreds to over two thousand dollars.
Tankless gas water heaters can be purchased at your retail stores like Home Depot, their prices range from $278.43 to $1716.00. Tankless gas water heaters can also be purchased from ebay.
One can buy Rheem tankless water heaters from a variety of places. The Rheem website is on possible option, as are online retailers, for example Amazon.