Until recently, it was hard to get a plumber to install a tankless heater- in Chicago, anyway. To do it you had to have an industrious handyman, preferably one who had one in his own home. Tankless water heaters have been in use in Europe forever, so the manufacturers were typically European, and plumbers were nervous about callbacks on a product they didn’t know.
Now, more US manufacturers are producing the products and more homeowners are asking for them. Here’s a little info to get you started:
Typical savings quoted for tankless: about half the tank water heating cost. Of course, the savings is because the water isn’t kept warm, waiting in a tank just in case you need it.
Tankless heaters CAN provide enough hot water, but need to be sized to accomodate your needs- just the same as tank heaters. This was one of the big bugaboos slowing their acceptance.
Tankless water heaters will NOT make the water at your sink turn hot faster- that’s a result of the faucet being too far from the heater. To solve that, you need a circulation pump. Or, since the tankless heater is smaller, it could be put closer to your faucet.
Some things that the tankless installation needs, different from the tank model:
- venting is usually bigger, due to the higher btu’s, (and may need to be stainless steel)
- gas line may need to be bigger.
- they are smaller and often wall mounted, so will free up some floor area in your mechanical room.