Heat Pump Installations We've Completed
Real Homes. Real Results.
Massachusetts Heat Pump Installation Projects | Real Home Transformations by SumZero
At SumZero Energy Systems, we believe every home deserves clean, efficient, and reliable comfort. Across Massachusetts, we’ve helped homeowners and businesses move away from outdated AC units and fossil fuel heating by designing custom heat pump systems tailored to each property.
From compact single-zone solutions to advanced mixed applications combining ducted and ductless equipment, every project highlights our ability to solve unique challenges while delivering year-round comfort.These real projects—from historic colonials to modern split-levels, from tight attic spaces to growing sanctuaries—show how flexible heat pump technology can be when paired with the right design and expert installation.
Whether it’s reducing energy bills, adding air conditioning for the first time, switching from oil or propane, or creating zoned comfort throughout an entire home, our team delivers solutions built for New England’s toughest seasons. Explore these case studies to see how SumZero continues to set the standard as Massachusetts’ #1 Heat Pump Installation company.
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Hybrid Heat Pump Upgrade for Complete Comfort
This Hopkinton project replaced a failing AC and reduced oil reliance with a hybrid heat pump system. The heat pump now handles cooling and primary heating, while oil serves as backup—delivering efficient, reliable comfort all year long.
Hopkinton
From Oil Heat to Mixed Heat Pump Comfort
This Norfolk four-story home had no AC and relied on oil heat. SumZero installed a two-system mixed heat pump setup—ducted on the lower floors and ductless on the upper levels—adding efficient cooling and replacing oil with year-round comfort.
Norfolk
3-Zone Mixed Heat Pump Upgrade for Efficient Living
This Natick split-level home switched from costly electric baseboard heating to a 3-zone mixed system. With ducted comfort in the bedrooms and ductless units in living areas and an office, the homeowners now enjoy lower bills and year-round comfort.
Natick
6-Zone Ductless Heat Pump Upgrade for Whole-Home Comfort
This Waltham project replaced oil heat with a fully ductless 6-zone heat pump system. With six wall-mounted mini-splits across three floors, the 2,300 sq. ft. home gained efficient AC, fossil fuel freedom, and precise comfort in every room.
Waltham
Mixed 3-Zone Heat Pump System for Whole Home Comfort
In Hopkinton, SumZero replaced fossil fuel heating and added cooling for the first time with a mixed 3-zone system—ducted and mini-splits working together to deliver efficient, room-by-room comfort all year long.
Hopkinton
Commercial Rooftop HVAC Upgrade for Church Sanctuary
SumZero replaced an aging system at Waves of Revival Church in Framingham with a new rooftop unit and updated ductwork, ensuring reliable heating and cooling for the sanctuary and proving our expertise in commercial HVAC solutions.
Framingham
From Propane to Dual Heat Pump Comfort
This Sherborn project replaced propane heating with two central air heat pumps—one in the basement and one in the attic—delivering efficient cooling and heating while seamlessly covering both the existing home and its new addition.
Sherborn
From Oil Heat to a Custom 4-Zone Heat Pump System
This Milton project replaced oil heat with a tailored four-zone heat pump design. By combining ducted systems with selective floor-mounted mini-splits, SumZero delivered efficient, comfortable, and customized heating and cooling.
Milton
Flexible Comfort with a 6-Zone Mini-Split System
In Arlington, SumZero replaced oil heat and solved cooling challenges by installing six wall-mounted mini-splits on one outdoor unit—delivering efficient comfort powered by solar in a home with no attic and tight basement space.
Arlington
Reliable Comfort with a Hybrid Heat Pump System
This Franklin project replaced two failing 18-year-old systems with hybrid setups that pair heat pumps with gas furnaces for backup, ensuring efficient cooling and dependable heating even in freezing New England winters.
Franklin
Eco-Friendly Comfort with a 2-Zone Heat Pump
This Medway project replaced an aging AC with a two-zone mixed heat pump system—a ducted unit for most of the home and a wall-mounted mini-split for added coverage—bringing efficient, eco-friendly comfort all year long.
Medway
Hybrid Heat Pump + Solar-Powered Comfort Upgrade
This Marlboro project transformed an oil-heated home with 30+ solar panels into a hybrid heat pump system, adding efficient AC, backup oil heat, and a wall-mounted mini-split for living room comfort all year long.
Marlborough
Watertown Home: 3-Zone Heat Pump + 200 Amp Upgrade
Discover how this Watertown home went from no AC and limited electrical capacity to year-round comfort and efficiency with a three-zone heat pump system and a full 200-amp electrical service upgrade—smart comfort built for the future.
Watertown
Whole-Home Comfort in Hopkinton
In this Hopkinton home, the homeowners wanted to replace old AC, cut oil use, and fix a hot/cold room above the garage. SumZero installed two Mitsubishi heat pumps for efficiency, a dedicated mini-split for that space, and a HEPA air cleaner for 99.9% cleaner air.
Hopkinton
Small Space, Big Solution | Medfield Ceiling-Mounted Mini-Split by SumZero
In this colonial home, the owners cut ties with fossil fuels and gained AC for the first time with a custom 8-zone mixed heat pump system—delivering room-by-room control, year-round comfort, and clean, efficient living.
Medfield
8-Zone Heat Pump Upgrade for Total Comfort in Acton Home
We transformed a colonial with a custom 8-zone mixed heat pump system—adding AC for the first time, eliminating fossil fuels, and delivering precise room-by-room comfort. A clean, efficient solution built for New England’s toughest seasons.
Acton
Goodbye Oil, Hello Fully Electric Comfort!
See how we transformed a farm-style home with a smart mix of ducted and mini-split systems, powered by solar.
Southborough
Hybrid Heat Pump Installation for Condo
See how we upgraded a condo with a hybrid system that heats and cools like a champ.
Ashland
Upgrading Comfort in a Classic Colonial
Watch how we transformed an old system into an eco-friendly solution.
Hopkinton
Hybrid Heat Pump Upgrade for Complete Comfort
This Hopkinton project replaced a failing AC and reduced oil reliance with a hybrid heat pump system. The heat pump now handles cooling and primary heating, while oil serves as backup—delivering efficient, reliable comfort all year long.
Hopkinton
From Oil Heat to Mixed Heat Pump Comfort
This Norfolk four-story home had no AC and relied on oil heat. SumZero installed a two-system mixed heat pump setup—ducted on the lower floors and ductless on the upper levels—adding efficient cooling and replacing oil with year-round comfort.
Norfolk
3-Zone Mixed Heat Pump Upgrade for Efficient Living
This Natick split-level home switched from costly electric baseboard heating to a 3-zone mixed system. With ducted comfort in the bedrooms and ductless units in living areas and an office, the homeowners now enjoy lower bills and year-round comfort.
Natick
6-Zone Ductless Heat Pump Upgrade for Whole-Home Comfort
This Waltham project replaced oil heat with a fully ductless 6-zone heat pump system. With six wall-mounted mini-splits across three floors, the 2,300 sq. ft. home gained efficient AC, fossil fuel freedom, and precise comfort in every room.
Waltham
Mixed 3-Zone Heat Pump System for Whole Home Comfort
In Hopkinton, SumZero replaced fossil fuel heating and added cooling for the first time with a mixed 3-zone system—ducted and mini-splits working together to deliver efficient, room-by-room comfort all year long.
Hopkinton
Commercial Rooftop HVAC Upgrade for Church Sanctuary
SumZero replaced an aging system at Waves of Revival Church in Framingham with a new rooftop unit and updated ductwork, ensuring reliable heating and cooling for the sanctuary and proving our expertise in commercial HVAC solutions.
Framingham
From Propane to Dual Heat Pump Comfort
This Sherborn project replaced propane heating with two central air heat pumps—one in the basement and one in the attic—delivering efficient cooling and heating while seamlessly covering both the existing home and its new addition.
Sherborn
From Oil Heat to a Custom 4-Zone Heat Pump System
This Milton project replaced oil heat with a tailored four-zone heat pump design. By combining ducted systems with selective floor-mounted mini-splits, SumZero delivered efficient, comfortable, and customized heating and cooling.
Milton
Flexible Comfort with a 6-Zone Mini-Split System
In Arlington, SumZero replaced oil heat and solved cooling challenges by installing six wall-mounted mini-splits on one outdoor unit—delivering efficient comfort powered by solar in a home with no attic and tight basement space.
Arlington
Reliable Comfort with a Hybrid Heat Pump System
This Franklin project replaced two failing 18-year-old systems with hybrid setups that pair heat pumps with gas furnaces for backup, ensuring efficient cooling and dependable heating even in freezing New England winters.
Franklin
Eco-Friendly Comfort with a 2-Zone Heat Pump
This Medway project replaced an aging AC with a two-zone mixed heat pump system—a ducted unit for most of the home and a wall-mounted mini-split for added coverage—bringing efficient, eco-friendly comfort all year long.
Medway
Hybrid Heat Pump + Solar-Powered Comfort Upgrade
This Marlboro project transformed an oil-heated home with 30+ solar panels into a hybrid heat pump system, adding efficient AC, backup oil heat, and a wall-mounted mini-split for living room comfort all year long.
Marlborough
Watertown Home: 3-Zone Heat Pump + 200 Amp Upgrade
Discover how this Watertown home went from no AC and limited electrical capacity to year-round comfort and efficiency with a three-zone heat pump system and a full 200-amp electrical service upgrade—smart comfort built for the future.
Watertown
Whole-Home Comfort in Hopkinton
In this Hopkinton home, the homeowners wanted to replace old AC, cut oil use, and fix a hot/cold room above the garage. SumZero installed two Mitsubishi heat pumps for efficiency, a dedicated mini-split for that space, and a HEPA air cleaner for 99.9% cleaner air.
Hopkinton
Small Space, Big Solution | Medfield Ceiling-Mounted Mini-Split by SumZero
In this colonial home, the owners cut ties with fossil fuels and gained AC for the first time with a custom 8-zone mixed heat pump system—delivering room-by-room control, year-round comfort, and clean, efficient living.
Medfield
8-Zone Heat Pump Upgrade for Total Comfort in Acton Home
We transformed a colonial with a custom 8-zone mixed heat pump system—adding AC for the first time, eliminating fossil fuels, and delivering precise room-by-room comfort. A clean, efficient solution built for New England’s toughest seasons.
Acton
Goodbye Oil, Hello Fully Electric Comfort!
See how we transformed a farm-style home with a smart mix of ducted and mini-split systems, powered by solar.
Southborough
Hybrid Heat Pump Installation for Condo
See how we upgraded a condo with a hybrid system that heats and cools like a champ.
Ashland
Upgrading Comfort in a Classic Colonial
Watch how we transformed an old system into an eco-friendly solution.
Hopkinton
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