Bests & Worsts Reviews from Amazon

I had a hard time finding a plumber or electrician to install a 27 model in central Montana. They are all stuck in past technology. Most of them swore this unit would not work. They insisted that my intake water temp was too cold, without ever testing it. I am 75 years old, and although I retired from the aircraft maintenance field I wanted a licensed professional to do the work in order to get the warranty, just in case. My water comes into my house at 55 - 57° winter and summer. My water comes from a deep community well with over 100 homes, so the water is constantly moving. It has been 2 years since my unit was installed and I haven't had the first problem. Its more than adequate for my two story home about 2000sf, two full baths, 2 showers can easily run at the same time. I frequently use an induction cooktop, microwave, airfryer and dishwasher, I have had no problems on a 200 amp system. I do make sure the induction cooktop and the microwave are never on at the same time. While I do notice the lights dim slightly when hot water is running in several places, I have never popped a circuit breaker. I strongly advise professional installation and the proper size unit for your climate. You must realize that this is a volume demand system and even tho the model 27 has three elements, seldom is more than one running at any given time. I would never own a home without a tankless water heater installed. Update, 3 years now, and not a hiccup! My plumber just finished flushing the unit. Very small amount of black sediment, and a tiny bit of calcium like scaling. He still recommends annual cleaning. Small price for added assurance.