Awesome company, awesome installation. A forum recommendation lead me to contact Tankless Concepts to discuss an install in late January of this year. The installation was completed in early February, and even an A rating doesn't do the company justice. Impeccable customer service, responsiveness and patience in explaining and discussing the pros and cons of the different models of tankless water heaters available, the company is really a pleasure to work with. Further, as they are a local company in the Northern Virginia area, I was also very happy to be able to support an awesome local business. Their installation was flawless and I am overjoyed to finally have the tankless system I have wanted for a long time There are many reasons for choosing to install a tankless water heater and if you are considering it or even curious about them, you should do yourself a favor and speak with Tankless Concepts first.