Financial Analysis Tool
ROI & Energy Payback Engine
Calculate annual energy savings, simple payback, net present value, and carbon reduction for THERMGLASS VIG vs. standard insulating glass. Supports US (IECC/ASHRAE) and EU (EN ISO 13790) unit systems.
Project Inputs
ISO 10077-1 estimate: ~0.13 standalone · ~0.10 hybrid Btu/h·ft²·°F — pending NFRC certification
Pre-certification estimate. Based on COG U = 0.46 W/m²·K (EN 673) and ISO 10077-1 area-weighted formula with thermally-broken aluminium frame. Update when NFRC 100/500 test data is available.
HDD used: 6300 °F·days (base 65°F)
Typical VIG premium over double-pane IGU: $12–$22/ft²
Results
ASHRAEAnnual Energy Savings
Payback & Investment
Net Present Value
NPV = discounted cumulative savings minus incremental cost. Positive = net financial benefit over the period.
Carbon Impact
Simplified steady-state model per ASHRAE Fundamentals 2021 §18 (US) and EN ISO 13790 (EU). Heating savings use HDD × U-delta × area ÷ system efficiency. Cooling savings use annual solar irradiance × SHGC-delta × area ÷ COP (NREL TMY3 / JRC PVGIS-5 by climate zone). Actual savings vary with orientation, shading, occupancy, and local climate. Use as a comparative planning tool — not a certified energy audit.
3-page branded report — cover, results, and methodology
Ready to specify?
Use the full configurator to generate a detailed thermal specification, compliance report, and pricing estimate for your project.