'%3e%3cpath%20d='M41.90,14.92%20L44.15,2.36%20L55.85,2.36%20L58.10,14.92%20A36%2036%200%200%201%2069.08,19.47%20L79.55,12.18%20L87.82,20.45%20L80.53,30.92%20A36%2036%200%200%201%2085.08,41.90%20L97.64,44.15%20L97.64,55.85%20L85.08,58.10%20A36%2036%200%200%201%2080.53,69.08%20L87.82,79.55%20L79.55,87.82%20L69.08,80.53%20A36%2036%200%200%201%2058.10,85.08%20L55.85,97.64%20L44.15,97.64%20L41.90,85.08%20A36%2036%200%200%201%2030.92,80.53%20L20.45,87.82%20L12.18,79.55%20L19.47,69.08%20A36%2036%200%200%201%2014.92,58.10%20L2.36,55.85%20L2.36,44.15%20L14.92,41.90%20A36%2036%200%200%201%2019.47,30.92%20L12.18,20.45%20L20.45,12.18%20L30.92,19.47%20A36%2036%200%200%201%2041.90,14.92%20Z'%20fill='url(%23cpGear)'%3e%3c/path%3e%3ccircle%20cx='50'%20cy='50'%20r='28'%20fill='none'%20stroke='%23012f00'%20stroke-width='3'%3e%3c/circle%3e%3cpath%20d='M43.50,37.50%20L45.50,35.50%20L54.50,35.50%20L56.50,37.50%20L56.50,43.50%20L62.50,43.50%20L64.50,45.50%20L64.50,54.50%20L62.50,56.50%20L56.50,56.50%20L56.50,62.50%20L54.50,64.50%20L45.50,64.50%20L43.50,62.50%20L43.50,56.50%20L37.50,56.50%20L35.50,54.50%20L35.50,45.50%20L37.50,43.50%20L43.50,43.50%20Z'%20fill='url(%23cpGold)'%20stroke='%23bf5d00'%20stroke-width='0.4'%20stroke-linejoin='miter'%3e%3c/path%3e%3c/g%3e%3c/svg%3e){kind=small}
Commercial HVAC for Multifamily, Co-op & Condo Buildings Across NYC
When the boiler drops on the first cold night, every apartment knows it — and so does the board. Com+ Mechanical keeps multifamily, co-op, and condo buildings warm, cool, and code-compliant across the five boroughs, Nassau, Westchester, northern New Jersey, and Stamford. We work the way managing agents and boards need us to: documented, responsive, and accountable to occupied buildings full of residents.
HVAC Challenges in Multifamily & Co-op Buildings
Uneven heat — top floors roasting, lower floors cold
Classic in one-pipe and two-pipe steam buildings: failed air vents, waterlogged returns, clogged traps, or a boiler short-cycling on a bad control. It generates the highest volume of tenant complaints in the building and often masks a plant running well above the Housing Maintenance Code minimum, wasting fuel to keep the cold apartments legal.
No heat or no hot water during the legal heat season
A down boiler in an occupied building is both a comfort emergency and a code exposure under the NYC heat-season requirements. Failed burners, low-water cutoffs, aquastats, circulators, or feed systems take the whole building offline at once — usually on the coldest night, when parts and crews are stretched thin.
PTAC and through-wall units failing apartment by apartment
Sleeve corrosion, seized fan motors, frozen coils, and dead compressors turn into a steady stream of unit-by-unit service tickets. Without a maintenance program these failures cluster at the start of cooling season and overwhelm the managing agent with individual complaints.
Rising fuel bills and an aging plant heading toward Local Law 97 limits
Many NYC residential buildings still run decades-old boilers — some on No. 4 oil being phased out citywide. As emissions caps tighten, an inefficient plant means both a climbing fuel budget today and a potential penalty exposure the board needs a capital plan for.
Domestic hot water complaints across stacks of apartments
Failing storage tanks, mixing valves, recirculation pumps, or heat exchangers leave whole risers with lukewarm or no hot water. Because it hits multiple units at once, it escalates to the board fast and is frequently confused with a heating problem.
Stale corridors, basement odors, and bathroom/kitchen exhaust that doesn't draw
Failed corridor make-up air, dead rooftop exhaust fans, and blocked shafts trap cooking odors, moisture, and stuffiness in common areas — driving complaints, mold and condensation risk, and ventilation-code questions during inspections.
HVAC Built for Occupied Residential Buildings
A multifamily building is not a single mechanical system — it's a central heating plant, a domestic hot water system, dozens or hundreds of in-unit terminals, common-area ventilation, and a lobby everyone judges the building by, all running over occupied apartments that cannot be shut down. Com+ Mechanical services the equipment NYC residential buildings actually run: one-pipe and two-pipe steam boilers, hydronic hot-water plants, PTAC and through-wall units, fan-coil and VRF systems, rooftop units over commercial ground floors, and the pumps, controls, and risers that tie them together. We understand the pressures a managing agent and a co-op or condo board live with — the NYC Housing Maintenance Code heat-season mandate, a fixed reserve budget, residents who call the front desk the moment a radiator goes cold, and Local Law 97 emissions caps closing in on the building's boiler. Every visit is documented for your records, your board package, and your compliance file, so the people who approve the spend can see exactly what they paid for.
HVAC Services We Provide for Multifamily & Co-op Buildings
Why Boards and Managing Agents Choose Com+
Our Simple Process
From call to comfort in 4 easy steps
Building assessment & walk-through
We survey the boiler room, domestic hot water system, in-unit terminal types, common-area ventilation, and controls with your super or building staff — and review the building's heat-season, inspection, and Local Law 97 status.
Scope, plan & budget
You get a documented scope and a maintenance, repair, or capital plan written for a board and managing agent: clear line items, photos, and priorities mapped to the building's reserve budget and approval timeline.
Service & emergency coverage
We perform scheduled maintenance and approved repairs with COIs and tenant notice handled, and back the building with 24/7 emergency response for heat, hot water, and cooling failures during occupancy.
Reporting & compliance documentation
After every visit you receive documented findings, photos, and equipment logs for your board package, reserve planning, and compliance file — so the board can see exactly what was done and what's coming next.
Types of Systems We Install
Central Steam Heating Plants
One-pipe and two-pipe low-pressure steam boilers serving radiators and convectors throughout the building — the dominant heating system in older NYC multifamily and co-op stock.
- •Burner, low-water cutoff, and control diagnostics
- •Steam trap, air vent, and return troubleshooting for even heat
- •Seasonal startup, shutdown, and heat-season tuning
Hydronic Hot-Water Boiler & Pump Systems
Hot-water boiler plants with circulators, zone valves, and baseboard or fan-coil distribution, common in newer buildings and post-conversion plants.
- •Circulator, expansion-tank, and zone-control service
- •Heat exchanger and domestic hot water integration
- •Oil-to-gas conversion and high-efficiency upgrades
In-Unit PTAC, Fan-Coil & VRF Terminals
Through-wall PTACs, fan-coil units, and VRF indoor units that heat and cool individual apartments, plus rooftop units over commercial ground floors.
- •Unit-by-unit repair and full replacement
- •Coil, sleeve, motor, and compressor service
- •Maintenance programs to prevent season-start failure clusters
The Com+ Mechanical Difference
Commercial residential focus
We service occupied multifamily, co-op, and condo buildings every day — central steam and hydronic plants, PTACs, fan coils, and common-area systems — not the occasional single-family install.
Built for boards and managing agents
Single point of contact, documentation written for board packages and reserve planning, and a vendor your residents and staff can reach when something goes down.
Whole-portfolio coverage
One vendor for one building or a portfolio of buildings across the boroughs and metro — consistent documentation and coordinated scheduling for the entire managed book.
Compliance-aware service
We service the plant with the heat-season mandate, DOB boiler inspections, and Local Law 97 emissions limits in view — and flag what the board needs to plan for next.
Transparent Pricing
No fees. No surprises. Just honest service.
Preventive Maintenance Agreement
A planned maintenance program scoped to the building's boiler plant, domestic hot water, terminals, and common-area systems to cut emergency failures and hold the plant at efficient, code-compliant operation.
- Scheduled boiler, pump, and control service plus seasonal startup/shutdown
- In-unit terminal (PTAC/fan-coil) maintenance program options
- Priority emergency response for buildings under agreement
- Documented reporting for board packages and reserve planning
Repairs & Retrofits / Capital Projects
Approved repairs, aging-plant replacement, oil-to-gas conversions, and efficiency retrofits scoped for a board's reserve budget and approval cycle.
- Documented scope with photos and repair-vs-replace guidance
- Boiler, pump, control, and terminal repair and replacement
- Oil-to-gas conversion and Local Law 97 efficiency planning
- Coordinated scheduling around residents and building staff
24/7 Emergency Service
Around-the-clock response for the failures that can't wait in an occupied building — no heat, no hot water, and cooling outages.
- 24/7 dispatch for heat, hot water, and cooling failures
- Crews experienced with NYC steam and hydronic plants
- COI and tenant-notice coordination on arrival
- Documented findings and follow-up repair plan
Pricing shown is a structure, not a quote. Final pricing is confirmed in writing after a building assessment.
Own a Commercial Property?
Business+ plans start at $499/year — includes 2 rtu tune-ups, 10% off all services, and priority scheduling.
Equipment & Brands We Service
Factory-trained technicians for all major HVAC manufacturers
%20--%3e%3csvg%20version='1.1'%20id='Layer_1'%20xmlns='http://www.w3.org/2000/svg'%20xmlns:xlink='http://www.w3.org/1999/xlink'%20x='0px'%20y='0px'%20viewBox='0%200%20150%2050'%20style='enable-background:new%200%200%20150%2050;'%20xml:space='preserve'%3e%3cg%3e%3cpath%20style='fill:%23C9202F;'%20d='M124.447,44.322c-23.807,5.229-55.19-0.102-55.19-0.102s73.175,3.979,71.344-20.254%20C138.687-1.368,35.312,8.163,35.312,8.163c60.192-10.521,91.646-0.564,93.939-0.144c11.942,3.18,19.694,9.036,20.404,15.459%20C151.563,35.271,135.269,41.943,124.447,44.322z'/%3e%3cpath%20style='fill:%23C9202F;'%20d='M83.171,38.6c-2.416,0-4.058-0.553-4.927-1.656s-1.022-2.773-0.301-5.027l4.168-12.728%20c0.861-2.684,1.97-4.478,3.324-5.382c1.353-0.904,3.469-1.357,6.35-1.357h2.956c2.877,0,4.145,0.301,5.231,1.535%20c0.934,1.06,0.972,2.521,0.108,5.205l-4.149,12.718c-0.723,2.254-1.507,4.117-3.085,5.223S88.903,38.6,86.488,38.6L83.171,38.6z%20M96.602,18.799c0.302-1.029,0.558-1.979,0.113-2.657c-0.327-0.502-0.804-0.66-1.711-0.731c-0.829-0.117-2.286-0.062-2.286-0.062%20c-1.258,0.037-2.021,0.267-2.65,0.772c-0.629,0.506-0.955,1.038-1.479,2.669L84.19,32.285c-0.406,1.26-0.455,2.143-0.151,2.65%20c0.302,0.506,1.244,0.822,2.747,0.822c1.418-0.004,2.752-0.059,3.935-0.955c0.682-0.43,1.019-1.258,1.459-2.508L96.602,18.799z'/%3e%3cpath%20style='fill:%23C9202F;'%20d='M14.834,38.18c0,0-14.646,0.014-14.643,0.002l8.314-25.357h6.201c0,0-7.508,22.517-7.448,22.517%20h8.521L14.834,38.18z'/%3e%3cpath%20style='fill:%23C9202F;'%20d='M39.008,15.701c-0.006,0,0.945-2.86,0.945-2.86H25.417c-0.002,0-0.005,0-0.005,0l-8.31,25.339H31.61%20l0.951-2.838c0,0-7.745,0-8.385,0c-0.027,0,1.516-4.672,3.201-9.758c3.337,0,7.298,0,7.294,0c-0.008,0,0.938-2.859,0.938-2.859%20s-3.821,0-7.282-0.001c0.876-2.64,1.72-5.18,2.333-7.023C34.597,15.701,39.013,15.701,39.008,15.701z'/%3e%3cpath%20style='fill:%23C9202F;'%20d='M77.25,12.821l-5.508,16.97l-2.311-16.967l-6.073,0.003l-8.253,25.356h6.074l5.537-16.979%20c0,0,2.265,16.725,2.305,16.971l-0.002,0.006l3.525,0.002l8.242-25.363L77.25,12.821L77.25,12.821z'/%3e%3cpath%20style='fill:%23C9202F;'%20d='M121.157,12.821h-4.427l-5.274,6.652l-1.309-6.652l-6.496,0.007l2.393,11.52l-10.54,13.836h4.357%20l7.112-9.356l1.94,9.352l6.226,0.002l-2.777-14.11L121.157,12.821z'/%3e%3cpath%20style='fill:%23C9202F;'%20d='M56.332,12.822l-5.511,16.971l-2.308-16.965l-6.075,0.003l-8.252,25.357h6.074l5.535-16.981%20c0,0,2.268,16.739,2.305,16.97l-0.002,0.012h3.527l8.241-25.365h-3.534L56.332,12.822z'/%3e%3cpath%20style='fill:%23C9202F;'%20d='M138.687,44.271c0,1.305-1.07,2.375-2.376,2.375c-1.305,0-2.373-1.07-2.373-2.375%20s1.068-2.373,2.373-2.373S138.687,42.967,138.687,44.271z%20M134.331,44.271c0,1.076,0.903,1.975,1.979,1.982%20c1.075-0.008,1.981-0.906,1.981-1.982c0-1.074-0.906-1.98-1.981-1.98C135.234,42.291,134.331,43.197,134.331,44.271z%20M135.688,42.98h1.022c0.559,0,0.768,0.295,0.768,0.57c0,0.533-0.334,0.695-0.616,0.834l0.42,1.08l-0.681,0.092l-0.317-1.041%20h-0.288l-0.211,1.004h-0.621L135.688,42.98z%20M136.095,44.135h0.223c0.321,0,0.524-0.189,0.524-0.48%20c0-0.156-0.124-0.295-0.327-0.295h-0.262L136.095,44.135z'/%3e%3c/g%3e%3c/svg%3e)
Don't see your brand? We service all major manufacturers! Call us to confirm.
Proudly Serving Nassau County
Fast, reliable service in your neighborhood
Frequently Asked Questions
Get answers to common questions about our services
Do you offer 24/7 emergency service for no-heat and no-hot-water calls?
Yes. In an occupied residential building, a down boiler or hot water system is an emergency the moment it happens — and during the heat season it's also a code exposure. We provide 24/7 emergency response across the five boroughs and surrounding metro for heat, hot water, and cooling failures.
Can you cover multiple buildings across a management portfolio?
Yes. We support managing agents and ownership groups with multi-building portfolios — giving you one vendor, consistent documentation, and coordinated scheduling across buildings and boroughs, whether each building has a central plant, in-unit PTACs, or a mix.
How does HVAC work help our building with Local Law 97?
For most multifamily buildings the heating plant is the largest source of emissions, so it's central to Local Law 97 exposure. A well-maintained, properly tuned boiler burns less fuel today, and for aging or oil-fired plants we can scope conversions and high-efficiency replacements and show how they affect the building's emissions profile and penalty exposure so the board can plan capital around it.
Do you work on both the central plant and individual apartment units?
Yes. We service the central steam or hydronic boiler and domestic hot water plant, the in-unit terminals — PTACs, through-wall units, fan coils, and splits — and common-area and corridor ventilation. One vendor covers the whole building instead of splitting it across trades.
How do you handle access, COIs, and resident notice in occupied buildings?
We coordinate with your super, building staff, and managing agent on apartment and boiler-room access, certificates of insurance, and tenant notice before mobilizing.
Can you help with DOB boiler inspections and keeping the plant compliant?
We service and document the plant with the city's periodic low-pressure boiler inspection requirements and the heat-season mandate in view, and provide the records and photos that support your compliance file.
Love Our Service? Share Your Experience!
Manage a building we've serviced? A quick review helps other NYC property managers and building owners find us.
5 stars • 500+ reviews
Most Requested Services
Our businesses' top picks for heating, cooling & air quality
Explore Commercial HVAC Resources
Equipment services, industry expertise, NYC compliance, and the metro areas we cover.
Equipment, Repair & Maintenance
Industries We Serve
NYC Compliance & Energy Law
Service Areas
Keep Your Building Warm, Compliant, and Off the Board's Worry List.
Tell us about the building — the plant, the unit types, and what's been failing. We'll assess it and give you a documented plan built for your board and your budget. Serving multifamily, co-op, and condo buildings across the NYC metro, 24/7.
Request a Building Assessment