Building type · Multifamily Buildings
Energy audits for apartment buildings, co-ops and condos.
Heating plants, hot water and common areas drive multifamily energy costs. We help owners, managers and boards cut them and plan for LL97 and electrification.
Typical challenges
- Overheated apartments and open windows in winter
- Aging steam or hot-water boilers
- High domestic hot water use
- LL97 2030 limits for R-2 buildings
Common measures
Where multifamily buildings save energy.
These measures come up most often in our audits of this building type. Your audit ranks them for your building.
Boiler plant upgrades
High-efficiency boilers, burner controls and outdoor reset.
Heating controls
Indoor temperature sensors that end overheating.
Hot water
Recirculation controls, low-flow fixtures, heat pump water heaters.
Common-area LED
Hallways, stairwells and garages with occupancy controls.
Air sealing & insulation
Roof insulation, window repairs, sealing shafts and penetrations.
Ventilation
Roof exhaust fan balancing and controls.
Heat pumps
Air-source heat pumps for heating, cooling and electrification.
Sub-metering
Apartment electric sub-metering to encourage savings.
Compliance & incentives
Rules that apply.
- NYC LL97Multifamily (R-2) limits drop from 6.75 to 4.07 kgCO₂e/sf in 2030; rent-regulated buildings may follow prescriptive measures.
- NYC LL87Audits and retro-commissioning every ten years for buildings over 50,000 sq ft.
- NJ benchmarkingApplies to commercial buildings over 25,000 sq ft.
- IncentivesCon Edison, NYSERDA, PSE&G and NJ Clean Energy multifamily programs.
FAQ
Can heating savings be achieved without major capital?
Often, yes. Heating controls with apartment temperature sensors, steam system repairs and boiler tune-ups commonly save 10–20% of heating fuel at modest cost.
Do you present to co-op and condo boards?
Yes. We prepare board-ready summaries with costs, savings, payback and incentive amounts.
Ready to see where your building loses energy?
Send us your building details or call an engineer directly. We reply within one business day with a recommended scope and fee.