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HVAC, electrical, and building services

Services for homes, businesses, and managed properties

Explore installation, repair, maintenance, efficiency, and electrical services across Massachusetts.

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Service categories

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Commercial HVAC services

Commercial HVAC

Commercial heating, cooling, ventilation, controls, maintenance, and replacement support for occupied buildings and facilities.

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Electrical Services services

Electrical Services

Licensed electrical troubleshooting, upgrades, circuits, controls, and equipment connections for residential and commercial properties.

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Service catalog

Browse Energy Efficiency services

Showing 73-84 of 86 services

Portfolio HVAC Efficiency Planning service
Property ManagementConsultation

Portfolio HVAC Efficiency Planning

Identify practical efficiency upgrades and replacement priorities across properties.

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Residential Duct Leak Diagnosis service
ResidentialConsultation

Residential Duct Leak Diagnosis

Identify accessible duct leakage and airflow-loss conditions affecting comfort and efficiency.

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Residential Duct Sealing Service service
ResidentialRepair

Residential Duct Sealing Service

Seal supported accessible duct leakage to improve delivered airflow and reduce conditioned-air loss.

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Residential Ductwork Installation and Repair service
ResidentialRepair

Residential Ductwork Installation and Repair

Install, repair, and improve residential ductwork for balanced airflow.

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Residential HVAC Airflow Balancing service
ResidentialSupport

Residential HVAC Airflow Balancing

Measure and improve room-to-room airflow through supported adjustments and system recommendations.

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Residential HVAC Replacement Consultation service
ResidentialConsultation

Residential HVAC Replacement Consultation

Evaluate existing equipment and plan a practical home HVAC replacement.

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Rooftop Unit Economizer Service service
CommercialRepair

Rooftop Unit Economizer Service

Diagnose, repair, and verify supported rooftop-unit economizer controls and dampers.

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Seasonal HVAC Readiness service
Property ManagementMaintenance

Seasonal HVAC Readiness

Prepare managed HVAC systems for heating and cooling seasons.

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Thermostat Installation and Repair service
ResidentialSupportInstallation

Thermostat Installation and Repair

Install, configure, and repair residential thermostats and HVAC controls.

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UV Air Purifier Installation and Service service
ResidentialCommercialInstallation

UV Air Purifier Installation and Service

Install and service supported HVAC UV air-treatment equipment.

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Variable-Speed HVAC Upgrade service
ResidentialCommercialReplacement

Variable-Speed HVAC Upgrade

Upgrade to variable-speed equipment for steadier comfort and efficient operation.

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Whole-Home Dehumidifier Installation and Service service
ResidentialSupport

Whole-Home Dehumidifier Installation and Service

Install and service supported whole-home dehumidifiers and drainage components.

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Our Happy Customers

Henry H.

Replace batteries in thermostat, checked furnace

Jenny W.

Great service! On time, knowledgeable & professional

Ray

Just had a service call because my tankless water heater stopped working with E110 code. Andrey located the root cause real quick and fixed the issue within half an hour, also gave reasonable recommendations for further maintenance.

Randy J.

Thanks to Andrey for an amazingly quick response to my request for a service call. He diagnosed and fixed my issue within 24 hours of my asking for help. Excellent service. Thanks.

Rajib M.

Andrey from Green Flow came out exactly when he said he was going to and fixed a simple problem with the heating system at my rental property. Really appreciate the quick turnaround and fair pricing.

Valni D.

I’m delighted. Andrey the technician came on time and found the problem. They charged me fairly price.We thinking about hiring the company to maintain.

Connie F.

I needed a thermostat installed. I called one day they were there the next day. Installed the thermostat and made sure it was working before they left. Came back the next day because no heat was coming out the vents and fixed that issue. No problems since. Thanks...

Jahangir R.

They were very organized to communicate and be on time to come to look at my air condition to fix it.

Atrian I.

Maintenance and repair A/c unit.

Enrique B.

Tankless water heater failed . I contacted Green Flow and Aundrey was dispatched. He arrived on time diagnose the issue and called the manufacturer eventually they agreed to replace the unit. Within a few days a new unit was installed and hot water was restored. Service was fast...

Yakov S.

I had an excellent experience with Green Flow, they were available to replace my dead central A/C unit on a short notice, and the price was thousands of dollars less than what I got quoted by two other companies. I would definitely use them again.

Gilberto C.

Great service. It was awesome that they were able to solve my heating issue in few hours. Love the transparency on the pricing. Andrey was great!