Regarding tankless:
There are only a few brands of Tankless Water Heaters available in this country today. We sell both the Bosch Aqua-Star and the Takagi brand.
The Takagi produces more hot water per minute than any other tankless available in this country.
Here's what the tankless can handle:
Bosch: 1 faucet on-going @ 2.8 gpm
Takagi TK-1: 2 faucets running on-going @5.3 gpm
Takagi TK-2: 3 faucets running on-going @ 6.9 gpm
For example: If you like to have 2 showers and the washer running at the same time, the TK-2 would be your best choice.
Please visit our web site at www.energyinnovations.net for more information or call us at 1-888-455-2312
Thank You
Kay

Hello,
It's Kay again from Energy Innovations.
I forgot to mention that I have a Takagi TK-2 in my own home. It replaced two 40 gallon tanks. I have 2.5 baths in my home and it provides more than enough hot water.
Any plumber or HVAC guy can install these. If you need help finding an installer in your area, we can help you find one.
We distribute all over the country.
Thank You
Kay

How does "any plumber" affect the warranty on TK-2 product. It seems such a wonderful product, and I have thoroughly researched both Takagi and Rinnai products. Rinnai says must be installed by a plumber having been through qualification process.

I have heard that a drawback to tankless water heaters is lack of temperature control at low volumes. For instance, if someone is using a single faucet to wash hands, the water will be too hot. Any thoughts?

I have heard that a drawback to tankless water heaters is lack of temperature control at low volumes. For instance, if someone is using a single faucet to wash hands, the water will be too hot. Any thoughts?