Building Energy Calculator

Quantify the impact of solar heat control glazing on your building's energy consumption, CO&sub2; footprint, and operational costs.

Based on validated TNO/BMC simulations across 10 cities worldwide. Laminated DGU and laminated DGU + low-e configurations.

Select location

Glass configuration

ATO interlayer

ATO + Low-e combination

Building parameters

Number of floors80

1100

Glass area per floor463m²

100 m²1,500 m²

Glass performance — Kriya 1.5w% + Low-e

Visible light transmission (T_vis)	28%
Solar heat gain coefficient (SHGC)	0.21
U-value	1.1W/m²K
Low-e coating	Yes (SN68)
ATO concentration	1.5w%

Energy reduction

47.8%

Up to 47.8% annual energy consumption reduction with Kriya 1.5w% + Low-e in Singapore

Annual CO&sub2; reduction

1,706Mt

CO&sub2; equivalent per year

Annual cost saving

€564,961

At $0.18/kWh (Singapore)

Annual energy consumption — 80-floor building

Standard DGU (no heat block)7,138,640 kWh

With Kriya 1.5w% + Low-e3,727,040 kWh

3,411,600 kWhsaved annually

Singapore energy context

Electricity price

$0.18

per kWh

CO&sub2; intensity

500

gCO&sub2;/kWh

Total glass area

37,040

m²

Based on independent TNO/BMC energy simulations using a standardised building model (1 floor, 5 rooms, all-glass facade, 15.2 x 30.5 m). Multi-floor results are linearly scaled from validated single-floor data.

Actual performance depends on building orientation, occupancy patterns, HVAC system efficiency, and local weather conditions. Results shown are indicative and should not replace a building-specific energy assessment.

CO&sub2; reductions and cost savings are calculated using location-specific electricity prices and grid emission factors. Currency conversions are approximate.

Simulation methodology

Building model

Energy simulations were independently performed by TNO/BMC (Netherlands Organisation for Applied Scientific Research / Building Model Consultants) using a standardised building model.

•1 floor, 5 rooms (15.2 × 30.5 m)
•All-glass facade, 2.4 m height
•Heating trigger: ≤ 21 °C / Cooling trigger: ≥ 24 °C
•Glass: laminated DGU (7.26/13/3 mm) and laminated DGU + low-e

Scaling approach

The calculator scales validated single-floor simulation results linearly by the number of floors and glass area. The reference impact model uses an 80-floor building with 37,088 m² total glass area (approximately 463 m² per floor).

Local factors

CO&sub2; reductions are calculated using location-specific grid emission factors. Cost savings use local electricity prices. Both factors are based on data from the original TNO/BMC study and may differ from current market conditions.