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: ~0.73 standalone · ~0.54 hybrid W/m²·K — pending EN 673 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 EN 673 / EN ISO 10077-1 certified test data is available.
HDD used: 3250 K·days (base 18°C)
Typical VIG premium over double-pane Low-E IGU: €80–€160/m²
Results
EN ISO 13790Annual 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.