Welcome to ultimate efficiency. With technology that operates only when hot water is needed, super-efficient heating coils, no pilot light, and no storage tank to heat and reheat water, you save on energy and utility costs. Rinnai tankless water heaters use up to 40% less energy than a traditional tank water heater. Plus, with premium technology, increased energy efficiency, an improved Home Energy Rating System (HERS) Index Score, and optimized LEED eligibility, our tankless solutions can increase your home's value. You can even qualify for energy efficiency rebates and tax credits. It's a smart investment for now and the future.
Endless hot water! It's been installed for about a year. Wanted to put one in for a long time and finally pulled the trigger. The only thing I would change is the size of it as far as output(BTU). Here in Missouri the ground water temperature gets pretty low in the winter which affects the amount of GPM. If 2 or more things are demanding hot water, it struggles to keep up because of the temperature rise required . Other than that I have no complaints. It's not really a complaint but, a better and/or more flexible way to change the temperature without buying the expensive controller. I think that should be standard on all models.. Ampeg2106279. Mon Apr 27 2026
