Verified record
Typical Greater Boston range for this kind of work, from regional averages — not a quote from Gemini's Heating & Cooling LLC. Use it to sanity-check bids, then get the real number in writing.
Estimated range
$5,000 – $11,400
Typical HVAC project around $8,200
A customer wrote that the Gemini technician fixed a water leak in the AC system and inspected all the connected systems. A customer wrote that Gemini replaced the old AC and had the new system installed and running within a week. A customer wrote that Gemini Cooling & Heating replaced the entire AC unit and the whole job was completed in just two days. In 2025 a customer wrote of having HVAC ducts cleaned by Gemini's Heating and Cooling. In 2024 a customer wrote that Hiram diagnosed the problem with the Limit Switch on a furnace that was not firing. In 2024 a customer wrote that Hiram completed the installation of a whole house heat pump quickly. In 2024 a customer wrote that Hiriam from Gemini's Heating and Cooling installed a hot water tank at a very reasonable price. In 2024 a customer wrote of a furnace that stopped working on a Saturday and of Hiram coming by Sunday morning to troubleshoot. In 2024 a customer wrote that Gemini's Heating and Cooling installed 2 heat pumps units, an airhandler with new ducting and 4 mini-splits. In 2024 a customer who had a full home heating and cooling system installed wrote of some minor damage to the ceiling, which Hiram had repaired. In 2023 a customer wrote of a tricky smart thermostat install in a 100-year old house, with new wires run to the basement through a coat closet. In 2022 a customer wrote that Hiram installed 3 Mitsubishi mini splits. In 2024 a customer wrote that Hiram did not open up the unit to perform a diagnostic on an AC leak and that $165 was paid just for him to come out. In 2024 a customer wrote that the work was bad and that fixing the original work cost more than $3k. In 2022 a customer wrote that $30,000 mini splits were completely non-functional for most of a year after the install. In 2022 a customer wrote that the wiring had been done incorrectly, creating a huge fire hazard. Gemini's Heating & Cooling holds a Better Business Bureau A+ grade.
Outstanding service! I recently had an issue with a water leak in my AC system, and the technician who came out was absolute top-notch. He did a thorough, comprehensive job not only fixing the immediate leak, but also inspecting all the connected systems to ensure everything was running safely and efficiently. He took the time to answer all my questions in detail and provided great, practical solutions for the future. The technician was extremely professional, knowledgeable, and polite throughout the visit. Fixed the problem completely and left the workspace spotless. I couldn't be happier with the results and will definitely call them again for any future HVAC needs. Highly recommended!
We had an excellent experience with Gemini Cooling & Heating! They replaced our entire AC unit, and the whole job was completed in just two days. From start to finish, the process was smooth, professional, and exactly as promised. A special thank you to Hiram, who was an outstanding point of contact throughout the project. He was reliable, responsive, honest, and kept us informed every step of the way. It’s hard to find a company that delivers on both quality and customer service, but Gemini exceeded our expectations. The installation was done efficiently, the crew was respectful and professional, and our new AC is working perfectly. We highly recommend Gemini Cooling & Heating to anyone looking for dependable HVAC service. Thank you for making the entire experience stress-free!…
We had an excellent experience with Gemini Heating & Cooling. Our old AC system needed to be replaced, and from the initial estimate to the final installation, the entire process was smooth, professional, and efficient. What impressed us most was how quickly they got everything done. They replaced our old AC and had our new system installed and running within a week, which was especially appreciated during the summer heat. The team was knowledgeable, punctual, respectful of our home, and took the time to answer all of our questions. The installation was clean, and everything was working perfectly before they left. If you’re looking for an honest, reliable HVAC company that delivers great service and stands behind their work, I highly recommend Gemini Heating & Cooling!
We had an excellent experience with Gemini Heating & Cooling. Our old AC system needed to be replaced, and from the initial estimate to the final installation, the entire process was smooth, professional, and efficient.What impressed us most was how quickly they got everything done. They replaced our old AC and had our new system installed and running within a week, which was especially appreciated during the summer heat.The team was knowledgeable, punctual, respectful of our home, and took the time to answer all of our questions. The installation was clean, and everything was working perfectly before they left.If youre looking for an honest, reliable HVAC company that delivers great service and stands behind their work, I highly recommend Gemini Heating & Cooling!…
I recently had my HVAC ducts cleaned by Gemini's Heating and Coolong, and I'm extremely pleased with the results. The technicians were professional, efficient, and thorough.
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4 changes recorded — last scanned Sep 28, 2026.
Transparent diagnostics5.0
Broad plumbing and HVAC range5.0
Repeat, years-long customers5.0
Water heater and boiler installs5.0
Two AC technicians out within a few hours5.0
27 years in business3.7
Steam and high-efficiency boiler work4.3