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Zhongke Nengkong Technology Co., Ltd. ESEC
Modern glass curtain wall building energy-saving technology background

Insulating View-Through Energy-Saving Window Curtain Smart Energy-Saving Calculator

Transparent Envelope Energy Efficiency Expert
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☀ What is inside sunlight?

Solar radiation reaches the earth's surface in three wavelength bands. Each band's Energy Share differs, and so do its effects on the indoor environment:

UV 5%
Visible 43%
Near-Infrared (Heat) 52%
Ultraviolet
100-400nm
Visible Light
400-700nm
Near-Infrared
700-2500nm
⚠ UV (5%)
Invisible. Causes sunburn and fading/aging of furniture. Small energy share but significant harm.
👁 Visible Light (43%)
Light visible to the human eye. Provides daylighting, but becomes heat when absorbed by indoor objects.
🔥 Near-Infrared (52%)
Invisible heat radiation. Over half of solar energy, and the main cause of indoor heating.
💡 Key Insight
Of solar radiation, More than half (52%) is invisible near-infrared heat radiation. ESEC window curtain uses96.5% NIR reflectance to keep heat out, total solar reflectance up to 88% - the physics behind high-performance insulation.
🛡 How does the curtain block selectively?

ESEC window curtains treat each wavelength band with a different reflect/transmit strategy - Highly reflect NIR heat, control visible light transmission：

Ultraviolet
Blocks 99%+
→ Transmits 1%
Visible Light
Reflects/Absorbs 97% (visible band)
→ Transmits 3%
Near-Infrared
Reflects 96.5% (NIR band)
→ Transmits 3.5%
📊 Energy Transmitted Through the Curtain
Solar energy entering the room through the curtain accounts for only About 3% — the curtain reflects88% of solar energy. Of the transmitted portion, visible light is about 41% and near-infrared about 58%.Total solar reflectance 88%、NIR reflectance 96.5% - extreme insulation through high reflectance.
⚠️ Measurement note: NIR reflectance 96.5% and visible-light reflectance/absorption 97% are bothper bandmeasured values that cannot be directly summed or equated to total solar blocking; the energy calculations in this tool uniformly use theTotal solar reflectance 88%.
1 Step 1 · Basic Information
m²
m²
W/m²·K
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⚙ Advanced Parameters (Product Spectral & Operating Parameters) ▼
🧪 Product Spectral Performance Parameters
%
%
%
W/m²·K
%
CNY/m²
%
%
⚙ Operating Parameters
CNY/kWh
🌡 Summer/Winter Savings Mechanisms
☀️ Summer · Reflecting Solar Heat
The curtain reflects 88% of solar radiant heat → indoor heat gain drops sharply → AC Raise by 3°C, or evenpause operation
❄️ Winter · Blocking Heat Loss
The curtain blocks indoor heat from escaping through the window → indoor temperature Raise by about 2°C → heating load reduced
🏢 Enterprise Value Assessment Parameters (McKinsey Value Levers Model · Click to Expand) ▼

Enter your company profile to assess the combined value of window curtains across employee comfort, productivity, ESG and more. Based on the McKinsey value-lever framework.

people
×10k CNY/yr
%
×10k CNY/yr
CNY/tonne
✓ Calculation Results
🌈 Solar Energy Composition — How Much Heat Does the Curtain Block
🔬 Spectral Analysis
⚡ How Savings Work — From Light to Heat to Electricity
☀
Solar Radiation
0 kWh
→
🛡
Curtain Blocks
0 kWh
→
🔥
Less Heat
0 kWh
→
❄
Less AC Power
0 kWh
Annual Electricity Saved
0kWh
Equivalent to 0 households' annual electricity use
Annual Electricity Cost Saved
¥0
Saved per m² 0 CNY/yr
Annual Carbon Reduction
0kg CO₂
Equivalent to planting 0 trees
Payback Period
0yr
Total Investment ¥0
🧴 UV Protection Benefits
🪑
Longer Furniture Life
About 3x
🎨
Slower Fading
↓ 99%
🧴
Skin Protection
UPF 50+
📊 Summer Solar Heat — Before vs. After Installation
Before Installation
0
kWh/yr
→
After Installation
0
kWh/yr
↓
Reduction
0
kWh/yr
📊 Energy Savings Breakdown
Summer Cooling Savings 0 kWh
0
Winter Heating Savings 0 kWh
0
🌡 Summer Temperature-Adjustment Savings(estimated) 0 kWh
0
Peak Load Reduction 0 kW
0
☀️❄️ Summer/Winter Dual-Season Savings Mechanism
☀️ Summer · Reflecting Solar Heat Gain
🔆
Solar Radiant Heat
Reaches the Window
→
🪟
Curtain Reflects
88%Solar Heat
→
❄️
Air ConditionerRaise by 3°C
or evenpause operation
Heat Blocked0 kWh
Cooling Electricity Saved0 kWh
Raise AC Setpoint0°C
❄️ Winter · Blocking Heat Loss
🔥
Indoor Heat
Escapes Outward
→
🪟
Curtain Shielding
Reduction1.0Heat Loss
→
🌡️
IndoorRaise by about 2°C
Heating Load Reduced
Insulation Heat Savings0 kWh
Heating Electricity Saved0 kWh
Indoor Temp Rise0°C
📋 Detailed Calculation Data
Item Value Unit Description
💡 Smart Recommendations
📈 10-Year Cumulative Savings Forecast(conservative scenario: includes 1.5%/yr curtain performance aging derating)
YearCumulative Electricity Saved (kWh)Cumulative Savings (CNY)Cumulative Carbon Reduction (kg)
📊 Enterprise Value Assessment
Based on the McKinsey value-lever model - window curtains create value far beyond electricity savings, spanning productivity, employee retention, ESG and more
Total Annual Economic Value
¥0×10k
Direct Energy Savings + Carbon Assets + Productivity + Staff Retention + Equipment Life + Reduced Sick Leave
💰 Six-Dimension Breakdown of Economic Value
⚡ Direct Energy Savings Value
¥0×10k/yr
AC cooling + heating electricity cost savings
🌍 Carbon Asset Value
¥0×10k/yr
Annual carbon reduction × carbon trading price — tradeable in carbon markets or offset against carbon tax
📈 Productivity Improvement Value
¥0×10k/yr
Comfortable environments boost work efficiency (McKinsey: 3-8% productivity gain)
🤝 Employee Retention Value
¥0×10k/yr
Higher satisfaction lowers turnover, cutting recruitment and training costs
🪑 Extended Equipment Life
¥0×10k/yr
99%+ UV blocking extends the life of furniture/flooring/artwork by 2-3x
🏥 Reduced Sick Leave Value
¥0×10k/yr
Less glare/heat-related eye strain and discomfort, lowering sick leave rates
🌱 ESG Value Assessment
E
Environment
S
Social
G
Governance
📋 Comprehensive ROI Analysis
ItemValueUnitDescription
📐 McKinsey Value Leverage Model Explained
This assessment applies the McKinsey "value-lever framework", breaking value creation intoFinancial Value (energy savings, carbon assets), Operational Value (productivity, equipment life), Human Capital Value (employee retention, health), and Brand & Compliance Value (ESG, green certification). Data sources: McKinsey healthy-building productivity research, the WELL Building Standard, and China carbon market (CEA) trading data. All parameters can be adjusted in the Enterprise Value section above.
📄 Free Energy-Saving Plan 💰 Product Quote Inquiry 🏢 Project Case References
Zhongke Nengkong (Beijing) Technology Co., Ltd.
Results of this tool are estimates for reference only. Actual energy savings are subject to on-site testing.