Commercial HVAC Specialists
24/7 Emergency Service
Preventive Maintenance Programs
Licensed & Insured
Serving Greater Boston & New England
Running a commercial building isn’t just about fixing equipment when it breaks.
It’s about preventing failures before they happen, protecting occupants, controlling operating costs, and keeping your facility running without interruption.
Our experienced technicians service everything from rooftop units and boilers to chillers, pumps, air handlers, and complete mechanical systems.
Whether you manage one building or an entire portfolio, DMS delivers responsive service backed by decades of commercial mechanical experience.
COMMERCIAL HVAC SERVICE BUILT AROUND YOUR BUILDING
5-20%
ANNUAL ENERGY SAVINGS
The Department of Energy estimates that proper operations and maintenance practices deliver 5-20% annual energy savings. Some systems achieve up to 30% on energy bills through preventive maintenance.
50%
REDUCTION IN TOTAL COSTS OF MAINTENANCE
Comprehensive planned maintenance programs result in 50% lower total maintenance costs compared to reactive (fix-it-when-it-breaks) approaches. Emergency repairs cost 50-100% more than standard service calls.
Benefits of Routine Service
5-7
YEAR LIFESTAPN EXTENSION
Well-maintained HVAC systems last an average of 5-7 years longer than neglected ones. A properly maintained system can reach 15-20 years of service, versus 10 years or less for systems that lack preventive care.
WHY DMS?
Many contractors only specialize in one trade.
Duggan Mechanical Services brings multiple building services together under one trusted partner.
If a plumbing issue affects your HVAC system, or a drain blockage causes mechanical problems, we already have the experts to solve it.
One Partner.
Every Mechanical System.
Our Services
Include:
HVAC
PLUMBING
DRAIN CLEANING
WATER TREATMENT
ELECTRICAL
FIRE PROTECTION
30%
ENERGY INEFFICIENCY
Poorly maintained systems
consume significantly more power than tuned units.
85%
FAILURE REDUCTION
Planned maintenance leads to a
massive drop in unexpected
mechanical outages
40%
OPERATING EXPENSE
3X
Emergency reactive repairs cost
three times more than proactive
maintenance.
REPAIR COST FACTOR
HVAC is often the single largest
expense in commercial building
operations.
Trusted Across Commercial Facilities
INDUSTRIES
HOSPITALS
LIFE SCIENCE
OFFICE BUILDINGS
SCHOOLS
MANUFACTURING
MUNICIPAL BUILDINGS
RETAIL
WAREHOUSES
MULTIFAMILY HOUSING
LABORATORIES
HVAC Services
Engineered solutions for complex environments. Our technicians are factory-certified in the world's leading mechanical hardware.
Preventative
Maintenance
Reduce downtime and extend equipment life through rigorous, scheduled inspection protocols.
Chillers &
Boilers
Expert service, troubleshooting, and optimization for central plant heating and cooling equipment.
Emergency
Repairs
24/7 rapid response when critical systems fail, ensuring minimal disruption to your operations.
Building
Controls
Improve efficiency and system visibility with advanced automation and integrated control platforms.
Cooling
Towers
Comprehensive inspection, maintenance, cleaning, and structural repairs for heat rejection systems.
Energy
Optimization
Reduce operating costs without sacrificing comfort through data-driven mechanical tuning.
Uneven temperatures.
Don't Wait Until Comfort
Becomes a Complaint.
Most HVAC failures don't happen overnight.
Routine maintenance helps identify those issues early, reducing costly emergency repairs and extending the life of your equipment.
Strange noises.
Small warning signs often appear weeks or months before equipment fails.
Longer run times.
Higher energy bills.
SYSTEM HEALTH CHECK
Let our engineers perform a non-invasive thermal imaging and acoustics test of your primary HVAC assests
MECHANICAL EFFICENCY SCORE: 75% OPTIMAL
What Working With DMS Looks Like
PROCESS
01
02
03
04
We complete the work efficiently
while minimizing disruption
to your building.
REQUEST SERVICE
Contact us online or call
our team.
ON-SITE EVALUATION
A commercial HVAC technician
evaluates your system and identifies
the issue.
REPAIR OR MAINTENANCE
Receive recommendations that
help reduce future repairs
and improve system performance.
KEEP YOUR BUILDING RUNNING
Trusted By Commercial Building
Owners Across Massachusetts
Testimonial 1
Testimonial 2
Testimonial 3
Testimonial 1
Commercial HVAC
Preventive Maintenance
Checklist
Learn what experienced facility managers inspect each month to reduce unexpected HVAC failures.
Reliable HVAC Service Starts
With One Call.
Whether you need emergency repairs, routine maintenance, or a long-term service partner, Duggan Mechanical Services is ready to help keep your building operating at its best.
HVAC Services
Engineered solutions for complex environments. Our technicians are factory-certified in the world's leading mechanical hardware.
Preventative
Maintenance
Reduce downtime and extend equipment life through rigorous, scheduled inspection protocols.
Chillers &
Boilers
Expert service, troubleshooting, and optimization for central plant heating and cooling equipment.
Emergency
Repairs
24/7 rapid response when critical systems fail, ensuring minimal disruption to your operations.
Building
Controls
Improve efficiency and system visibility with advanced automation and integrated control platforms.
Cooling
Towers
Comprehensive inspection, maintenance, cleaning, and structural repairs for heat rejection systems.
Energy
Optimization
Reduce operating costs without sacrificing comfort through data-driven mechanical tuning.
Frequently asked questions
Hours
Sun
Mon
Tue
Wed
Thu
Fri
Sat
Closed
7:00 a.m. - 4:30 p.m.
7:00 a.m. - 4:30 p.m.
7:00 a.m. - 4:30 p.m.
7:00 a.m. - 4:30 p.m.
7:00 a.m. - 4:30 p.m.
Closed
24/7 Emergency Service
Get industrial insights and maintenance tips.
UPDATES