Dennis has been servicing our geothermal system for more than 5 years. The system has performed flawlessly, and Dennis puts the system through its paces every year around this time as he performs preventive maintenance on it. We have never had to call for service, but if we do, we'll ask for Dennis. We are very pleased with his attention to detail, and with his kind demeanor.
Gary and Peggy Troutman
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