'%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}
NYC Local Law 84 Benchmarking: Your Building's Energy Story Starts With HVAC
If your building is on the Covered Buildings List, you must benchmark energy and water use every year, and that data drives your public efficiency grade. Heating and cooling typically dominate a commercial building's energy use, so HVAC performance is central to how your building scores. Com+ Mechanical helps NYC owners and property managers assess, upgrade, and document their systems to benchmark with confidence.
Compliance Risks & What's at Stake
Missing the benchmarking deadline
Covered buildings that do not submit a complete, accurate benchmarking report by the City's deadline can be issued a Notice of Violation and assessed penalties. NYC uses a tiered structure with additional penalties accruing at subsequent quarterly deadlines for continued non-compliance.
A poor or failing energy efficiency grade
Your benchmarking data feeds the Local Law 33/95 energy efficiency letter grade your building must post near each public entrance. Buildings that do not benchmark on time can receive a failing grade, which is displayed publicly to tenants, customers, and prospective buyers.
Inaccurate or incomplete energy data
Benchmarking is only as good as the underlying data. Missing utility accounts, mismetered HVAC loads, or wrong gross floor area can produce a misleading EUI and an unfair score, and submitting inaccurate data can itself create a compliance problem. Clean HVAC metering and accurate building characteristics matter.
Wrongly assuming you are not covered
Owners are responsible for checking the Covered Buildings List each year and confirming whether their property is required to benchmark. Relying on an outdated assumption, or missing a property that has crossed a size threshold, can lead to an unintended violation.
Inefficient HVAC inflating your numbers
Aging boilers and chillers, failing controls, oversized equipment, and poor ventilation strategies drive Energy Use Intensity up. A high EUI doesn't just hurt your grade, it signals operating-cost waste and weaker positioning for related NYC energy laws.
Benchmarking data feeding Local Law 97 exposure
The energy data you report under LL84 becomes a foundation for other NYC requirements, including Local Law 97 emissions limits. Building owners who ignore HVAC efficiency now may face far larger compliance challenges, including potential emissions penalties, under those overlapping laws.
What Local Law 84 Requires and Why HVAC Is at the Center
NYC Local Law 84 (the benchmarking law, originally LL84 of 2009 and expanded by Local Law 133 of 2016) requires owners of covered buildings to measure and annually report their building's energy and water consumption to the City. Covered buildings are generally those over 25,000 gross square feet, with multiple buildings on a single tax lot covered when their combined floor area exceeds 100,000 gross square feet. Each year, owners compile whole-building energy data (electricity, natural gas, steam, fuel oil) and eligible water data into the EPA's ENERGY STAR Portfolio Manager tool and submit it to the City by the annual deadline, currently May 1 for the prior calendar year. The City uses that submission to calculate standardized metrics such as Energy Use Intensity (EUI) and an ENERGY STAR score, and your benchmarking results feed the energy efficiency letter grade your building must post near its entrances under Local Law 33/95. Because space heating, cooling, ventilation, and domestic hot water are usually the largest drivers of a commercial building's energy consumption, the condition and efficiency of your HVAC systems have an outsized effect on your numbers. Benchmarking itself is a reporting obligation, not an emissions cap, but the data you report also becomes a foundation for other NYC laws, including Local Law 97 emissions limits. Com+ Mechanical is the commercial HVAC partner that turns those metrics into an action plan, helping you capture accurate data, improve the systems that move the numbers, and document the work.
How Com+ Helps You Comply
Why Owners Partner With Com+ on Benchmarking
Our Simple Process
From call to comfort in 4 easy steps
Assess
We review your building's systems, current benchmarking data, and energy use, then evaluate how your HVAC equipment, controls, and metering affect your Energy Use Intensity and efficiency grade. You get a clear read on where you stand and where the opportunities are.
Plan
We translate the assessment into a prioritized HVAC roadmap, identifying which upgrades, controls improvements, and commissioning measures will most improve your numbers, sequenced around your budget and building operations.
Implement
Our commercial team executes the work, from equipment replacement and controls integration to retro-commissioning and airside/waterside balancing, with minimal disruption to tenants and operations.
Document
We compile equipment data, efficiency ratings, and completed measures into records that support your benchmarking submission and create a documented trail for future reporting years and related compliance needs.
Types of Systems We Install
High-Efficiency Heating & Cooling Plant
Replacing aging boilers and chillers with high-efficiency equipment is often the single biggest lever on a building's Energy Use Intensity, directly improving benchmarking results and reducing operating costs.
- •High-efficiency and condensing boilers
- •High-efficiency chillers and rooftop units
- •Right-sized equipment to eliminate oversizing waste
- •Improved part-load performance for real-world operation
Heat Pump & Electrification Systems
Air-source and other heat pump systems can sharply cut a building's heating energy intensity and position it for both benchmarking improvement and longer-term NYC emissions requirements.
- •Air-source and VRF/VRF-style heat pump systems
- •Reduced reliance on fossil-fuel heating
- •Combined heating and cooling efficiency
- •Supports readiness for related emissions laws
Building Automation & Controls
Modern controls and a well-tuned building management system reduce runtime, tighten scheduling, and cut waste across existing equipment, improving benchmarking numbers without full plant replacement.
- •BMS optimization and integration
- •Demand-based scheduling and setbacks
- •Economizer and ventilation control tuning
- •Ongoing performance monitoring
Why Com+ Mechanical
Commercial HVAC specialists for the NYC metro
We focus on commercial and multifamily buildings across the New York City metro, the property types most affected by NYC's benchmarking and energy laws.
Benchmarking-aware engineering
We connect HVAC decisions to the metrics that matter for Local Law 84, so upgrades are chosen for impact on your Energy Use Intensity and grade, not just equipment swaps.
Full-scope capability
From assessment and metering through retrofits, controls, commissioning, and maintenance, we handle the HVAC side of compliance end to end under one accountable partner.
Documentation built in
We provide the equipment and project documentation owners and property managers need to support their submissions and stay organized year over year.
Transparent Pricing
No fees. No surprises. Just honest service.
Compliance Assessment
The starting point: we evaluate your HVAC systems, metering, and current benchmarking data to show how your equipment affects your Energy Use Intensity and efficiency grade, with a prioritized roadmap.
- HVAC system and condition review
- Energy Use Intensity and efficiency-driver analysis
- Metering and review for benchmarking
- Prioritized improvement roadmap
- Recommendations to support your annual submission
Upgrades & Retrofits
Implementation of the high-impact measures identified in your assessment, focused on the systems that most affect your benchmarking numbers and operating costs.
- High-efficiency boiler, chiller, and rooftop/heat-pump replacements
- Building automation and controls upgrades
- Retro-commissioning of existing systems
- Ventilation and economizer optimization
- Equipment documentation for your records
Ongoing Compliance & Maintenance
Year-round support that keeps systems efficient and your benchmarking trend improving, with documentation maintained for each reporting cycle.
- Preventive maintenance to sustain efficiency
- Ongoing controls and performance tuning
- Annual benchmarking-cycle support
- Updated equipment and measure documentation
- Guidance on related NYC energy laws
Pricing is scoped after the Compliance Assessment, based on your building's size, systems, and the measures you choose to pursue.
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
Does Local Law 84 apply to my building?
Local Law 84 generally applies to buildings over 25,000 gross square feet, and to multiple buildings on the same tax lot whose combined floor area exceeds 100,000 gross square feet. The City publishes a Covered Buildings List each year, and as the owner you are responsible for checking it and confirming whether your property must benchmark. Com+ can help you understand how your building's systems factor in once you know your status.
What exactly does benchmarking require me to do?
You compile your building's whole-building energy data (electricity, natural gas, steam, and fuel oil) and eligible water data into the EPA's ENERGY STAR Portfolio Manager tool and submit it to the City by the annual deadline, currently May 1 for the prior calendar year. The City uses it to calculate metrics like Energy Use Intensity and an ENERGY STAR score.
How does HVAC affect my benchmarking results?
Heating, cooling, ventilation, and domestic hot water are typically the largest energy uses in a commercial building, so the efficiency and condition of your HVAC systems strongly influence your Energy Use Intensity and the resulting score and grade. Improving those systems is one of the most direct ways to improve your benchmarking numbers over time.
What happens if I miss the deadline or report inaccurate data?
Covered buildings that fail to submit a complete, accurate report on time can receive a Notice of Violation and monetary penalties, with NYC using a tiered structure that adds penalties at subsequent quarterly deadlines for continued non-compliance. Late or non-submission can also result in a failing energy efficiency grade posted publicly at your building.
How is benchmarking related to the energy efficiency letter grade I have to post?
Your Local Law 84 benchmarking data feeds the energy efficiency letter grade required under Local Law 33/95. The City issues a label with a score and a letter grade that you must display near your building's public entrances, and buildings that do not benchmark on time can receive a failing grade. Improving HVAC efficiency to lower your Energy Use Intensity is a key lever for a better grade.
Is Local Law 84 the same as Local Law 97?
No. Local Law 84 is a reporting requirement, you measure and report energy and water use, and it does not by itself cap your emissions. Local Law 97 sets greenhouse gas emissions limits for covered buildings and carries penalties for exceeding those limits. They are connected, though: the energy data you report under LL84 becomes a foundation for evaluating LL97 compliance, which is why improving HVAC efficiency now helps on both fronts.
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
Benchmark With Confidence, Before the Deadline
Your benchmarking submission and your public efficiency grade are only as strong as the HVAC systems behind them. Don't wait until the reporting window to find out your Energy Use Intensity is working against you. A Com+ Mechanical compliance assessment shows you exactly where your heating and cooling systems stand and what to improve, so you can report accurately, grade better, and stay ahead of related NYC energy laws. Schedule yours today.
Book Your Assessment: (332) 600-4640