Best energy management system for commercial real estate
Milvian AI teamFacilities and infrastructure intelligence
For an owner, energy is an NOI line. The right EMS baselines every building against weather, recovers tenant costs from meters and shows the penalty exposure under building performance standards.
Energy is an NOI line
In a net lease the tenant pays most of the energy, but in gross and modified gross leases the owner carries the common areas, the central plant and anything not sub-metered. Every unrecovered kilowatt-hour comes straight off net operating income, and NOI is what the building is valued on.
ENERGY STAR estimates that commercial buildings and industrial plants use half of US energy, and that often 30 percent or more of it is wasted. In a portfolio, that waste is usually spread across schedules left on, simultaneous heating and cooling and meters nobody reads.
The NOI levers and how to measure them
| Lever | What moves it | What to measure |
|---|---|---|
| Common-area consumption. | Lobby, corridor and plant schedules. | Feeder and plant meters against a weather baseline. |
| Tenant recovery. | Sub-metered use billed at the right rate. | Consumption per lease, read monthly. |
| Bill accuracy. | Utility billing errors and rate changes. | The gap between invoiced and recorded kilowatt-hours. |
| Penalty exposure. | Emissions above a performance standard limit. | Metered energy converted to emissions by fuel. |
What the EMS must do
| Requirement | Why it matters here | Ask the vendor |
|---|---|---|
| Baseline every building against weather. | Year-on-year comparisons are wrong whenever the weather differs. | Show the regression behind your baseline. |
| Split cost changes into rate and usage. | Asset managers need to know which one moved. | Can a report separate tariff from consumption? |
| Bill tenants from meters. | Recovery is only as good as the data behind it. | What happens when two leases sit on one meter? |
| Validate utility bills. | Billing errors are recoverable money. | Which billing errors have you caught for other owners? |
Standards and what is next
Nearly 25 percent of US commercial building space already benchmarks in ENERGY STAR Portfolio Manager, and many cities require it. New York's Local Law 97 charges $268 per metric ton of CO2e over the limit, and first reports were due 1 May 2025. GRESB's 2025 real estate assessment drew 2,382 submissions from 1,002 fund managers, so investors now compare portfolios on measured data.
How to evaluate one
- Upload a year of bills per buildingEach building gets an expected-use baseline from day one.
- Rank by gap to baselineSpend engineering time on the buildings drifting most.
- Audit tenant recoveryCompare what was billed with what was metered.
- Model the penaltyConvert each covered building's energy to emissions against its limit.
Where Aqueduct fits
aQ EnergySmart builds each building's expected use from past bills and degree days, then turns the gap into money through rate configuration. Billing Management raises tenant invoices, flags any lease whose use leaves its normal range, and checks each utility invoice before it is paid. Portfolio views rank top improvers and buildings that need attention. Aqueduct covers 20M+ sq ft of commercial real estate.
Sources
| Source | Link |
|---|---|
| ENERGY STAR, About ENERGY STAR for buildings | energystar.gov |
| ENERGY STAR, Benchmark your building | energystar.gov |
| NYC Department of Buildings, LL97 presentation | nyc.gov |
| NYC Department of Buildings, Local Law 97 | nyc.gov |
| GRESB, Real Estate Assessment 2025 | gresb.com |
