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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 61-72 of 86 services

EV Charger Installation service
ResidentialCommercialInstallation

EV Charger Installation

Install approved electric-vehicle charging equipment and required circuits.

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Furnace Maintenance service
ResidentialMaintenance

Furnace Maintenance

Maintain furnaces for reliable heating, clean airflow, and seasonal readiness.

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Furnace to Heat Pump Conversion service
ResidentialReplacement

Furnace to Heat Pump Conversion

Plan a furnace-to-heat-pump upgrade around comfort and backup-heat needs.

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Geothermal and Water-Source Heat Pump Service service
ResidentialCommercialSupport

Geothermal and Water-Source Heat Pump Service

Install and service geothermal and water-source heat-pump systems and components.

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Heat Pump Auxiliary Heat Problem Service service
ResidentialRepair

Heat Pump Auxiliary Heat Problem Service

Diagnose backup-heat, thermostat, staging, and heat-pump conditions that affect auxiliary heat.

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Heat Pump Balance Point Setup service
ResidentialSupport

Heat Pump Balance Point Setup

Review supported heat-pump controls and balance-point settings for comfort and backup-heat operation.

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High-Efficiency Boiler Control Optimization service
ResidentialCommercialSupport

High-Efficiency Boiler Control Optimization

Review supported boiler control settings, zoning, reset logic, and operating behavior for reliable efficient operation.

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Home Ventilation Service service
ResidentialSupport

Home Ventilation Service

Install and service ventilation equipment that supports fresh-air exchange.

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HVAC Zoning System Installation and Service service
ResidentialCommercialInstallationSupport

HVAC Zoning System Installation and Service

Create and service HVAC zones for better room-by-room comfort and control.

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Hydronic Outdoor Reset Control Upgrade service
ResidentialCommercialInstallation

Hydronic Outdoor Reset Control Upgrade

Install or optimize supported outdoor-reset controls for hydronic heating systems.

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Interior and Exterior Lighting Service service
ResidentialCommercialSupport

Interior and Exterior Lighting Service

Install and repair interior, exterior, and energy-efficient lighting.

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Oil Heating to Heat Pump Conversion service
ResidentialReplacement

Oil Heating to Heat Pump Conversion

Replace or reduce oil-heating dependence with a planned heat-pump conversion.

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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!