HVAC, Boiler, Furnace, Heat Pump & Mini-Split Service in Winchendon, MA

“Amazing service and quality work. Kept me informed on what was being done and had everything laid out step by step the entire time.”

“Josh and his team were awesome. They gave me a quote quickly, came out a few days later (our job wasn't a rush), and did an awesome job. They installed our water heater and vented it outside in under 3 hours. They left our basement spotless after the install too. Very very friendly and polite as well. If I ever need any other plumbing/HVAC work I'm going to reach out.”

“Josh and his crew are amazing. Far exceeded all of my expectations. Very responsive from day one and communicated well every aspect of my project every step of the way through completion. Highly recommend Tandem Mechanical this is hands down the best company Ive ever hired.”

“Had my water tank go on me this past weekend memorial weekend at that! But fortunately i was covered 100% by warranty and tandem mechanical was the company the insurance sent my way Viktoria was great in communication with me explaining everything from start to finish even offered to come in on that very same weekend her crew of guys please don’t be taken back they are young but very smart educated and well prepared for the job very knowledgeable and knew exactly how to get the job done Sam took over and he finished the job due to one of the guys who had to leave early (no waiting he did not leave or stopped working until Sam got there)Sam took his time and made sure everything was put back in order he was kind enough to accompany me to the store to make the exchange return yesterday was very hot he did not once complained very patient and i think that is very important in jobs like these. I will be using them again i couldn’t be happier with their service from start to finish thank you all! Keep up the amazing work!”

“The crew of three were knowledgeable, hard working, efficient and very pleasant.”

“Josh was very prompt and professional. Quoted over the phone a basic price and charged me less. He switched out my old gas stove and hooked up my new one. I would definitely recommend him. 5 Stars!!”