Dennis came to clean and then service my elderly Rinnai heater. He was both friendly and thorough each time he was here. He had to be extremely patient while waiting for the Rinnai company to answer his phone call (very annoying music), and he stayed connected with the service person until they figured the problem out. I appreciated his perseverance with a system that was foreign to him. He solved the problem. Keep snowboarding, Dennis!
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