Serving Greater Boston since 1990 • Licensed & insured • MA HIC #161190 Medford • Malden • Boston • North & West Suburbs
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Our work

Projects from basements and side yards around Greater Boston.

Real Priority One installations — boilers, ductwork, radiant systems and central air. Pick a category, then open a project to see more photos.

Radiant heating tubing laid over insulation and rebar before a concrete pour 2 photos
Radiant systems

Radiant Heating Installation

Tubing laid out and secured ahead of the pour, with the manifold and controls set on the mechanical side.

Finished Navien boiler installation with organized copper piping 2 photos
Boilers

Boiler Installation

A wall-hung condensing boiler with zone circulators, air separator, expansion tank and controls on one clean board.

Insulated trunk line and branch ductwork in a basement ceiling 4 photos
Ventilation

Ventilation & Ductwork

Trunk and branch ductwork run through the framing during construction, sized so every room actually gets air.

Two Bosch high-efficiency units installed in a basement mechanical room 1 photo
Heating

Mechanical Room Installation

A multi-unit mechanical room build-out — equipment set, vented, piped and labeled so anyone servicing it can follow the work.

Bosch air handler connected to new sheet metal ductwork in a basement 1 photo
Heating & cooling

System Installation

Air handler installed and tied into new sheet metal — the equipment and the distribution done by the same company.

Two outdoor air conditioning condenser units installed beside a home 1 photo
Cooling

Central Air Installation

Two condensers set level, with the line sets and electrical run so the units can be serviced without a wrestling match.

Thermostat subbase with control wiring landed on the terminals 2 photos
Diagnostics

Controls & Diagnostics

Thermostats, control boards and low-voltage wiring — the part of the job where testing beats guessing.

Priority One Services owner shaking hands with a crew member on a job site
On the job

Same two owners, every job.

Frankie and Hans hold the licenses, run the calls and do the work — more than 60 years between them on residential and commercial systems around Greater Boston.

Want work like this on your house?

Tell us what your system is doing and we'll tell you honestly what it takes to fix it. Consultations on new systems and larger projects are free.

Medford · Malden · Boston · Greater Boston

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