Plumbing RepairRestaurant dish pit line replacement
Replaced a failing grease-laden waste line overnight so the kitchen opened on time.
Crews on call right now
Commercial Plumbing & HVAC That Keeps You Open
When a boiler, main line, or rooftop unit goes down, every hour costs you. Richard A Demars Inc delivers licensed commercial plumbing and HVAC service built around one goal: getting your facility back online — fast, and for good.
No-obligation quotes · Response within one business day
Licensed & Insured
24/7 Emergency Response
Commercial-Only Expertise
On the job
Full-system commercial rough-in & retrofit
What We Do
Two trades, one contractor, zero finger-pointing
Most facility issues don't sit neatly in one trade. We handle both sides of the mechanical room — so you're not stuck coordinating between a plumber and an HVAC company while your building sits at half capacity.
Commercial Plumbing
Installation, repair, and maintenance for the systems your building runs on — domestic water, sanitary and storm lines, gas piping, backflow prevention, and commercial water heating.
HVAC Services
Rooftop units, chillers, boilers, and controls — installed, repaired, and tuned for efficiency so your energy bill and your downtime both go down.
Explore HVAC services24/7 Emergency
Burst lines, failed chillers, no-heat calls, sewage backups. We answer, we dispatch, and we get you back online.
See emergency coveragePreventive Maintenance Plans
Scheduled inspections, seasonal tune-ups, and priority dispatch for the systems you can't afford to lose. Catch the failing valve before it becomes a flood.
Compare plan options
Who We Are
A commercial contractor, not a residential plumber with a van
Richard A Demars Inc works exclusively on commercial properties. That focus matters: commercial systems run at pressures, volumes, and duty cycles that residential work never touches — and commercial clients need documentation, code compliance, and minimal disruption to tenants and operations.
We bring the licensing, insurance, and hands-on mechanical experience to handle the full scope, from a single failed pump to a complete system replacement — planned, permitted, and finished on schedule.
Licensed & insured
Fully credentialed for commercial mechanical work in the jurisdictions we serve.
Code-compliant work
Permits, inspections, and documentation handled as part of the job.
Both trades in-house
Plumbing and HVAC under one contract — one call, one crew, one invoice.
Built for uptime
Scheduling shaped around your operating hours, not ours.
Industries Served
Every facility has a failure it can't afford
We tailor service, scheduling, and maintenance around what going down actually costs you — because a restaurant losing a dish pit and an office tower losing a chiller are not the same emergency.
01
Restaurants & Food Service
02
Hotels & Hospitality
03
Office Buildings
04
Retail & Mixed-Use
05
Healthcare Facilities
06
Schools & Campuses
07
Warehouse & Industrial
08
Property Management
Emergency Line Open
When it breaks at 2 a.m., you need a number that answers
Burst water lines. Failed rooftop units. No heat, no cooling, sewage backup. Our emergency crews are dispatched around the clock to commercial properties — with the parts and the experience to stabilize the problem on the first trip.
We handle
- Burst and leaking water lines
- Sewage backups and drain blockages
- No heat / no cooling calls
- Failed boilers, chillers, and rooftop units
- Gas line and water heater failures
- Sump pump and lift station failures
Recent Work
The proof is in the mechanical room
From emergency repairs to full system replacements, here's the kind of work we do every week.
Plumbing RepairHVAC / BoilerBoiler room retrofit for an office tower
Rebuilt the heating loop and controls, cutting seasonal energy use and nuisance trips.
New ConstructionCommercial restroom rough-in
Full rough-in for a multi-stall restroom build-out — permitted, inspected, and signed off.
Request a Quote
Tell us what's going on. We'll tell you what it takes.
Send us the details of your project or problem and we'll come back with a clear scope and pricing — no obligation, no pressure.
1
Send your details
Tell us the property type, the system, and what you're seeing.
2
We assess
We review the request and follow up with any questions we need answered.
3
You get a clear scope
Written pricing and a plan for the work, usually within one business day.
Ready to stop reacting and start planning?
Whether it's an emergency call or a planned system replacement, one conversation gets you a straight answer and a clear price.