Core Service
Send us an address and 12 months of utility data. We return a calibrated building energy model with upgrade scenarios; each backed by full annual simulation.
The Problem
$25K–$100K
Per-building cost for a traditional ASHRAE Level 2 energy audit. Manual geometry, assembly entry, HVAC configuration, calibration, and reporting.
65–125 hrs
Per building model. Every project starts from scratch on a desktop machine with licensed software.
1 building
At a time, per modeler, sequential. Scaling means hiring; the talent pool is shrinking every year.
A traditional ASHRAE Level 2 energy audit requires an on-site walkthrough, manual model construction in licensed desktop software, iterative calibration by an experienced analyst, and a hand-written report. For a single building, that's $25K–$100K and 4–8 weeks. For a portfolio of 50 buildings, it's a multi-million-dollar line item before a single retrofit is planned.
The modeling work doesn't require a person in the building. It requires physics.
The Full Breakdown
An ASHRAE Level 2 energy audit follows 7 steps. Roovie fully replaces 5 of them; the 5 that consume the most labor and introduce the most error.
An energy engineer visits the building. Documents type, vintage, footprint, orientation. Photographs envelope, HVAC nameplates, lighting. Interviews facility manager about schedules and known issues.
Build the energy model from scratch in desktop software. Manually enter geometry, define every wall/roof/floor/window assembly. Configure HVAC systems, capacities, efficiencies. Set up occupancy, lighting, and plug load schedules.
Collect 12–24 months of utility bills. Reformat into monthly consumption and cost tables. Normalize for weather. Identify billing cycle dates and rate structures.
Run simulation, compare monthly energy against utility data. Adjust infiltration, load densities, equipment efficiencies, and schedules until model matches reality. ASHRAE Guideline 14: NMBE ±5%, CV(RMSE) ≤15%. Typically 5–15 adjustment cycles.
For each proposed upgrade, modify the model and re-run the full simulation. Each scenario requires a separate file, a complete re-simulation, and documentation. Testing 5–8 ECMs takes 5–8 separate sessions.
Calculate energy cost savings, implementation costs, simple payback, ROI, and lifecycle cost for each ECM and bundled packages. Cross-reference utility rates and incentive programs.
Assemble the final audit report: executive summary, facility description, utility analysis, baseline documentation, end-use breakdown, ECM descriptions, financial analysis, and appendices. Typically 40–80 pages.
Traditional audit
65–125 specialist hours
$25K–$100K per building
4–8 weeks timeline
1 building at a time
5–15 manual calibration cycles
With Roovie
5–15 hours (review only)
Subscription-based. No per-building fees
Days, not weeks
Concurrent, cloud-based
Automated calibration loop
Calibration Standard
A simulation that doesn't match reality isn't useful. Roovie calibrates every model against your actual utility data using ASHRAE Guideline 14 thresholds, the industry standard for simulation accuracy. The calibration isn't a manual art. It's an automated optimization loop.
Monthly calibration
±5%
NMBE: Normalized Mean Bias Error
≤15%
CV(RMSE): Coefficient of Variation
The model's monthly energy predictions track within 5% of your actual bills on average, with no single month deviating more than 15% from the pattern.
Hourly calibration
When interval meter data is available
±10%
NMBE
≤30%
CV(RMSE)
Captures daily load shapes, peak demand timing, and weekend/weekday variations at hourly resolution.
The calibration loop adjusts five categories of model parameters to match your utility data:
Every projection Roovie makes (every ECM savings estimate, every payback calculation) starts from this calibrated baseline. The model matches your building before it predicts your future.
ECM Methodology
Industry standard: deemed savings
Most energy audits use deemed savings: percentage estimates from lookup tables. “Replace lighting → save 30%.” These numbers come from industry averages and don't account for your building's specific climate, orientation, envelope, HVAC interactions, or operating patterns.
When you combine multiple ECMs, the interactions are ignored. Each measure is estimated independently, and the savings are simply added up. The total overstates real savings because measures interact: better insulation reduces cooling load, which reduces the savings from an HVAC upgrade.
Roovie: full re-simulation
Every ECM scenario runs as a complete 8,760-hour building re-simulation. When you test a cool roof coating, the platform re-simulates the entire building: accounting for reduced solar heat gain, the downstream effect on cooling load, the change in HVAC energy, and the impact on heating energy.
When you test a combination of ECMs, the whole package runs as a single integrated simulation. Measure interactions are captured automatically because the physics engine resolves them; it doesn't add up independent estimates.
Example: Cool Roof + HVAC Upgrade
Deemed savings approach
Cool roof: –12% cooling energy
HVAC upgrade: –18% HVAC energy
Combined: –30% (overstated)
Full simulation approach
Cool roof alone: –10.2% cooling, +1.8% heating
HVAC upgrade alone: –15.6% HVAC
Combined: –19.8% total
The cool roof reduced the cooling load the HVAC handles, so the HVAC upgrade saves less than it would in isolation. Only full simulation captures this interaction.
Deliverables
A full annual simulation model of your building, generated from the address and calibrated against your actual utility consumption. Geometry, envelope assemblies, HVAC systems, and schedules; all configured automatically and refined to match reality.
Hour-by-hour energy consumption for the full year. End-use breakdown by heating, cooling, lighting, plug loads, fans, and pumps. Understand where your energy goes; not as a pie chart estimate, but as a physics-based simulation.
Month-by-month comparison of simulated energy against actual utility bills. Calibration metrics per ASHRAE Guideline 14. The model doesn’t just run; it matches your building’s real performance.
Each energy conservation measure runs as a full re-simulation. LED retrofit, envelope improvement, HVAC upgrade, heat pump conversion; every scenario shows energy savings, cost savings, carbon reduction, and simple payback against the calibrated baseline.
Assembled deliverable with baseline analysis, end-use breakdown, calibration summary, and ECM comparison. Ready for your client, your compliance filing, or your capital planning process.
NanoTech Advantage
The simulation identifies where your building loses energy. NanoTech's materials provide the upgrade path. The same platform verifies the savings after installation.
The diagnostic tool and the treatment are built by the same team. No other company connects building-level physics to building-level materials with before-and-after verification in one stack.