Customer Testimonials
Comfort Stories That Speak for Themselves
At SumZero, we believe comfort is more than just temperature—it’s peace of mind for every season.
That’s why we let our customers do the talking. From battling humidity and warped doors to finding relief during scorching summers, families share how SumZero transformed their homes with reliable, no-pressure solutions. Explore their stories and see how comfort begins with the right partner.
Real Experiences. Real Comfort. Real Results.
See How Families Like Yours Found Lasting Solutions with SumZero
From Oil Boiler Failure to Custom Comfort Heat Pump
When Laura’s boiler broke in her Upton home, SumZero delivered fast. With a Custom Comfort ducted heat pump system, she gained reliable heating and cooling in every room—installed quickly, seamlessly, and with care.
Upton
From Costly Oil to Mini Split Comfort
After paying over $900 for just 180 gallons of oil, David knew it was time to switch. With SumZero’s guidance and a $10,000 rebate, he upgraded to efficient Mitsubishi mini splits—gaining reliable comfort and long-term savings.
Medfield
From Gas Furnace to Heat Pump Comfort in Arlington
Derrick wanted to replace his aging furnace and A/C with a smarter, all-in-one solution. SumZero guided him through the process, provided competitive pricing, and delivered a seamless heat pump installation that now keeps his Arlington home comfortable year-round.
Arlignton
From Oil Boiler to Heat Pump Comfort
When Jason’s oil boiler failed, a replacement would have cost over $20,000 for the same outdated system. Instead, SumZero installed a Mitsubishi multi-zone ductless heat pump, bringing efficient, year-round comfort to his Cape-style home.
Bellingham
From Window Units to True Whole-Home Comfort
After years of struggling with window A/C units, this homeowner wanted a lasting solution that would add comfort and property value. With SumZero’s expertise, the project was designed with care—placing units exactly where needed while keeping outdoor equipment out of sight. Professional, precise, and respectful, the installation delivered comfort and peace of mind that far exceeded expectations.
Stay Cool with Expert A/C Replacement
An aging air conditioner can leave your home hot, uncomfortable, and costly to run. At SumZero, we make upgrading simple. From evaluating your old system to installing a high-efficiency replacement, our team handles everything—including rebates—so you enjoy reliable comfort, lower energy costs, and peace of mind all summer long.
Ashland
Complete Home Comfort with Ducted + Ductless Heat Pumps
Every home is unique, and sometimes one solution isn’t enough. That’s why Nick’s Grafton home combined ductless wall units downstairs with a ducted system upstairs—delivering year-round comfort in every room. With SumZero’s expertise, even challenging layouts get tailored solutions that fit perfectly.
Grafton
Turning My Home Into a Command Center with SPAN
After years of driving a Tesla, I wanted my home to be just as smart. With the SPAN Smart Panel and SumZero’s expert installation, I now have real-time control, future-ready energy, and a seamless system that grows with me.
Hopkinton
How the Torches Found Comfort in Every Season
When Katie and Jeff Torches faced summers so humid that paint peeled from their walls and doors warped, they turned to SumZero for answers. Instead of a sales pitch, they found real solutions. Hear their story of how simple, effective climate control brought lasting comfort to their growing family.
Holliston
Stay Cool with Expert A/C Replacement
An aging air conditioner can leave your home hot, uncomfortable, and costly to run. At SumZero, we make upgrading simple. From evaluating your old system to installing a high-efficiency replacement, our team handles everything—including rebates—so you enjoy reliable comfort, lower energy costs, and peace of mind all summer long.
Ashland
Complete Home Comfort with Ducted + Ductless Heat Pumps
Every home is unique, and sometimes one solution isn’t enough. That’s why Nick’s Grafton home combined ductless wall units downstairs with a ducted system upstairs—delivering year-round comfort in every room. With SumZero’s expertise, even challenging layouts get tailored solutions that fit perfectly.
Grafton
Turning My Home Into a Command Center with SPAN
After years of driving a Tesla, I wanted my home to be just as smart. With the SPAN Smart Panel and SumZero’s expert installation, I now have real-time control, future-ready energy, and a seamless system that grows with me.
Hopkinton
From Gas Furnace to Heat Pump Comfort in Arlington
Derrick wanted to replace his aging furnace and A/C with a smarter, all-in-one solution. SumZero guided him through the process, provided competitive pricing, and delivered a seamless heat pump installation that now keeps his Arlington home comfortable year-round.
Arlignton
From Window Units to True Whole-Home Comfort
After years of struggling with window A/C units, this homeowner wanted a lasting solution that would add comfort and property value. With SumZero’s expertise, the project was designed with care—placing units exactly where needed while keeping outdoor equipment out of sight. Professional, precise, and respectful, the installation delivered comfort and peace of mind that far exceeded expectations.
From Costly Oil to Mini Split Comfort
After paying over $900 for just 180 gallons of oil, David knew it was time to switch. With SumZero’s guidance and a $10,000 rebate, he upgraded to efficient Mitsubishi mini splits—gaining reliable comfort and long-term savings.
Medfield
From Oil Boiler Failure to Custom Comfort Heat Pump
When Laura’s boiler broke in her Upton home, SumZero delivered fast. With a Custom Comfort ducted heat pump system, she gained reliable heating and cooling in every room—installed quickly, seamlessly, and with care.
Upton
How the Torches Found Comfort in Every Season
When Katie and Jeff Torches faced summers so humid that paint peeled from their walls and doors warped, they turned to SumZero for answers. Instead of a sales pitch, they found real solutions. Hear their story of how simple, effective climate control brought lasting comfort to their growing family.
Holliston
From Oil Boiler to Heat Pump Comfort
When Jason’s oil boiler failed, a replacement would have cost over $20,000 for the same outdated system. Instead, SumZero installed a Mitsubishi multi-zone ductless heat pump, bringing efficient, year-round comfort to his Cape-style home.
Bellingham
We're Your Guide to Rebates and Financing
Embark on your MassSave journey with us by your side. Our expertise ensures you maximize your rebates and financing options, turning complex processes into simple steps.
