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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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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 49-60 of 86 services

Central Air Conditioning Maintenance service
ResidentialMaintenance

Central Air Conditioning Maintenance

Tune up central AC systems for dependable cooling and cleaner operation.

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Combi Boiler Installation and Service service
ResidentialSupport

Combi Boiler Installation and Service

Install and service combination boilers for space heating and domestic hot water.

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Commercial Ductless HVAC Service service
CommercialSupport

Commercial Ductless HVAC Service

Install and service ductless systems for offices, retail, and specialty spaces.

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Commercial Energy-Recovery Ventilation Service service
CommercialSupport

Commercial Energy-Recovery Ventilation Service

Install, maintain, and repair supported commercial energy-recovery ventilation equipment.

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Commercial HVAC Consultation and Equipment Planning service
CommercialConsultation

Commercial HVAC Consultation and Equipment Planning

Evaluate building needs and plan practical commercial HVAC service or replacement paths.

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Commercial HVAC Controls Calibration service
CommercialMaintenance

Commercial HVAC Controls Calibration

Review and calibrate supported HVAC sensors, thermostats, setpoints, schedules, and control sequences.

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Commercial Ventilation and Indoor Air Quality service
CommercialConsultation

Commercial Ventilation and Indoor Air Quality

Improve commercial ventilation, filtration, purification, and indoor air quality.

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Commercial Water Heater Installation and Service service
CommercialSupport

Commercial Water Heater Installation and Service

Install and service commercial tank, tankless, electric, gas, and heat-pump water heaters.

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Dual-Fuel Control Optimization service
ResidentialSupport

Dual-Fuel Control Optimization

Review supported heat-pump and backup-fuel controls, changeover settings, and operating behavior.

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Duct and Airflow Efficiency Optimization service
ResidentialCommercialConsultation

Duct and Airflow Efficiency Optimization

Identify duct and airflow issues that reduce comfort and HVAC efficiency.

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Ductless Mini-Split Maintenance service
ResidentialMaintenance

Ductless Mini-Split Maintenance

Clean and maintain ductless systems for efficient zoned comfort.

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ERV and HRV Installation and Service service
ResidentialCommercialSupport

ERV and HRV Installation and Service

Install and service supported energy-recovery and heat-recovery ventilation systems.

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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!