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"Outstanding service and professional installation!!"

"Advanced Mechanical Services (AMS) went out of their way to get our new oil tank installed and the old one removed in the winter. We were experiencing issues with our old tank where our oil company could not fill the old tank. AMS worked closely with us to install the new tank quickly. They kept us in the loop and were on time on installation day. The installers were professional, kept us informed and did an excellent job. In addition, they cleaned up after themselves. We also use them for our annual furnace cleaning. They always do a great job and have come out on emergency calls a few times over the past 25 (or more) years. I highly recommend them."

"The technicians were clean, professional and punctual and did the job as was planned."

"John was outstanding! He meticulously diagnosed the problem and installed the equipment after tracking it down at 2 local supply houses. He kept us informed every step of the way and worked diligently until the work was completed. This is the second time we've asked Mull Bros. to perform a service at our house. We received excellent service both times. Mull Bros. is a highly professional company that has exceeded our expectations.
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"Installed a new AC system to replace old one for $7500."

"Juan responded quickly on a Sunday afternoon. He was very knowledgeable and fixed the broken part. Fortunately, Juan had the part in his truck and was able to get my furnace working again. The service was impeccable! However, the weekend rates are expensive the service cost me $699 for installation of a $70 part. The 2-hour service call was $500 ($249 per hour)."

"Friendly, professional and knowledgeable. Provided prompt and reliable service, installing new furnace, ac condenser and thermostat."

"For the past 4 years I have depended on Cromwell Energy to perform annual preventive maintenace on my two furnaces / AC units, plus hot water heater. They always show up on time, friendly techs who know their trade, and are very thorough in assesing each component. They are neat in their work and clean up after the job is done. If there is ever a need for a call-back due to a minor item, they are prompt to respond and courteous. Their charges are reasonable for the amount of time and marerials they use. I will continue to use them in the future due to consistently great service. I will also recommend them to my friends."

"It got done, unfortunately required a full system replacement."

"It went well. We will use his services again, if necessary."