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SOLUTIONS

Energy-Saving Retrofit Solutions for Glass Facades & Windows

Calculate first, retrofit second · Every energy-saving investment adds up clearly

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MARKET CONTEXT

市场背景 · Why 是现在

存量幕墙的能耗欠账，正在变成一笔必须处理的成本

12亿㎡+国内既有建筑幕墙存量
50%2005 年前建成、亟待Energy retrofit
40%建筑能耗Medium门Window Curtain墙占比
26-50%Window Curtain综合节能优化率

政策驱动：从「可选」到「必须」

建筑领域碳达峰工作持续推进，公共建筑能耗限额、绿色建筑评价与Existing Building Retrofit被反复写入政策文件。玻璃幕墙作为围护结构Medium热工最薄弱的一环，改造需求从企业自愿逐步升级为合规刚需。

存量现实：换玻璃代价太High

既有幕墙更换玻璃意味着停机、拆装、结构复核与巨额成本，多数业主难以接受。室内侧加装ESEC Window Curtain，不换玻璃、No removal幕墙、当层施工一天完工，成为存量改造的现实路径。

成本压力：空调电费持续上行

西晒朝向幕墙夏季太阳得热集Medium，空调负荷与峰值电费同步抬升。降低太阳得热后，Cooling setpoint can be raised by about 3°C，制冷电耗随之下降，节省的是长期运营支出。

体验诉求：隔热不能牺牲视野

传统遮光帘解决了晒，却挡掉了景与光。ESEC Window Curtain在阻隔Solar Radiation热的同时保留Visible Light与室外视野，白天室外看不清室内，兼顾舒适、私密与采光需求。

Zhongke Energy Control | One-Way View-Through Energy-Saving Window Curtain — Glass Heat-Insulation & Sun-Shading Solutions

Zhongke Energy Consumption Control (Beijing) Technology Co., Ltd. specializes in building-envelope energy efficiency. Its core product, the one-way view-through energy-saving window curtain, is the preferred fix for curtain wall heat, sun and west-sun stuffiness in offices, schools, hospitals and commercial complexes.

Most projects hit the same wall: how to fix west-sun offices, or floor-to-ceiling windows that bake all afternoon? Traditional curtains and open-weave sun blinds blur the view once drawn; films are troublesome to replace; Low-E glass replacement is costly and complex. Our hole-free optical-film curtain resolves these pain points cleanly — insulation without blocking the view, shading without dimming the light.

Using selective optical materials to tune solar radiation, the curtain blocks infrared heat efficiently, lowers the SHGC (solar heat gain coefficient), and cuts cooling loads, building energy use and carbon emissions. It also filters harsh glare in offices and classrooms, protects furniture and exhibits, and slows UV fading.

As a no-glass-removal insulation solution, it is an interior-mounted system: no dismantling of the existing curtain wall, no damage to facades, simple approvals and low noise & dust during work on existing buildings. Standard and floor-to-ceiling windows install quickly; for large curtain walls and special window types we provide on-site surveys and custom installation plans.

The system is modular — aluminum tracks, optical film and tubular motors can each be replaced separately, keeping lifetime maintenance costs low. Manual or motorized remote control, plus BMS integration for smart linkage, suits both new builds and energy-retrofit projects in existing public buildings.

From office curtain walls to school windows, hospital wards and sunrooms, the one-way view-through energy-saving window curtain delivers efficient heat and sun protection while preserving outdoor views — saving AC costs for years and improving indoor comfort.

For project costs or a sample demo, feel free toContact — send us drawings or book an on-site survey for a tailored energy plan and a formal quotation. You can also first use theSavings Calculatorto estimate annual electricity savings and payback.

Glass curtain wall west-sun problem and ESEC curtain value (AI scene): block solar heat, keep the view, reduce glare
BY INDUSTRY

Customized by building typeRetrofit solutions

Over 1.2 billion m² of existing curtain wall in China; about 50% of pre-2005 glass curtain walls need energy retrofit

01

Office Towers / Corporate Headquarters

A high proportion of glass curtain wall and concentrated west-facing sun exposure drive heavy summer cooling loads. By cutting solar heat gain, the window curtain allows the setpoint to be raised by 3°C, bringing down cooling power consumption and peak load together while easing glare at workstations next to the glass.

02

Hospital Buildings

Patient wards and waiting areas demand a high standard of light environment and comfort, while energy consumption still has to be kept in check. As a core drafter of the Technical Standard for Energy-Saving and Carbon-Reduction Retrofitting of Existing Hospital Buildings, we provide a compliant retrofit path aligned with that standard.

03

Schools / Public Venues

Blackboards and screens suffer reflections, and afternoon west-facing sun makes classrooms stuffy. The window curtain eliminates glare and protects eyesight while lowering summer temperatures, improving both study and spectator environments.

04

Commercial Complex

Extensive glazing across atriums and curtain walls drives high cooling loads. The window curtain balances solar shading with visual clarity, cutting air-conditioning runtime and improving customer comfort.

05

Industrial Plants / Parks

Large-area skylights and sidewall glazing in industrial plants generate intense radiant heat. The window curtain lowers temperatures in the work zone, improves working conditions, and reduces year-round energy costs.

06

Hotels / Apartments

Guest rooms face different directions, and west-facing rooms draw the most complaints. The window curtain improves guest room comfort and privacy while reducing split-unit air-conditioning energy use and maintenance costs.

REAL SCENES

On-Site Scenes · Seeing is believing

Different spaces, different orientations — the same window curtain, consistently soft light

Photographed at the ESEC window curtain showroom, with multiple samples available for hands-on comparison
Wangjing, Beijing · Photographed at the showroomA range of coating samples — come and compare them in person
With the window curtain half lowered in the tea room, sunlight turns soft and the city outside stays clearly visible
Tea Rooms / Reception AreasHalf lowered for solar shading — equally suited to tea and to receiving guests
ESEC window curtains installed on leisure space windows, photographed on site
Leisure / Wellness SpacesBlocks heat, not the view — greater comfort in relaxation spaces

Book a visit to our Wangjing showroom in Beijing to experience the window curtain first-hand → Contact

DUAL SEASON

Both summer and winterTwo-way energy savings

One window curtain system: reflects solar heat in summer, blocks heat loss in winter

01

Summer · Reflects solar radiant heat

The window curtain reflects 88% of solar radiant heat, sharply cutting indoor heat gain and cooling load. The setpoint can be raised by about 3°C, or the system switched off altogether. Per ASHRAE benchmarks, every 1°C increase in the cooling setpoint saves roughly 6% of cooling energy.

02

Winter · Blocks indoor heat loss

On the interior side of the glass the curtain forms an added air layer and a highly reflective surface, lowering the window K-value (thermal transmittance — the measure of insulation; lower is better): less heat escapes through the glass, indoor temperature rises about 2℃ and heating load drops.

The lower-grade the existing glazing (higher K-value, the poorer the insulation), the greater the improvement the curtain delivers.

BEFORE / AFTER

Retrofit methodCompare

Compared onESEC curtain retrofitReplacing curtain wall glassHeat-insulation film普通遮阳帘（卷帘/百叶/蜂巢帘）
Removal of existing windowsNo removal — mounted on the interior sideRequires removal and reinstallationNo removalNo removal
Duration1 day per spaceWeeks to months1–2 days半天至 1 day
Solar reflectance88%Depends on the glazing specificationTypically 30–70%挡光为主，隔热Limited
View while shaded单向透景，看景不受影响View visibleView visible，但膜色削弱观感Drawn, it blocks the view and feels stuffy (fully closed, privacy is good)
AdjustableRaise/lower · stops freely at any heightNot adjustable贴附后固定，无法调节可升降，但百叶需逐片调角
Impact on building facade室内侧安装，Facade unchangedAppearance changes slightly深色/High反光膜面改变幕墙统一色调，色差难复原室内安装不影响外立面；外遮阳则改动外立面
Light pollution不依赖镜面反射，不产生反射眩光Controllable with low-reflectance glassHigh反光膜面造成反射眩光，夜间易生“鬼影”面料漫反射，基本无Light pollution
Environmental & health100% Formaldehyde-free，不释放 VOCGlass is recyclable劣质胶层High温释放甲醛、苯等 VOC，残胶难清Fabric collects dust and dust mites，需定期拆洗
ReversibilityRemovable and replaceable，不伤原幕墙IrreversibleIrreversible，撕膜易留胶可更换，但轨道需保留
Added functionsAnti-glare, UV protection, privacy, winter insulationLimitedLimited，且隔热逐年衰减遮光、隐私，保温性差
MaintenanceFabric can be replaced on its ownNo maintenance needed易褪色起泡翘边，需重贴清洁频繁，蜂巢孔格难清理
Service life15 yrs20+ years5–10 years4–8 years

注：表Medium “Heat-insulation film”“普通遮阳帘”两列为行业内较普遍的情况，不针对任何具体品牌。贴膜的主要问题在于：深色或High反光的膜面会Breaks the facade's colour and stylistic unity；部分产品的胶体环保性存疑，High温下可能释放甲醛、苯等挥发性有机物；High反光膜面还会对周边建筑和道路造成反射Light pollution；且膜贴上后就无法再调整，隔热与采光只能二选一。

Existing office west-sun retrofit (AI scene): no window or glass replacement, ESEC curtain mounted inside
Existing buildings can be retrofitted tooNo window or glass replacement · mounted inside (AI scene)
PROCESS

Completed in four stepsEnergy retrofit

01

On-site survey

We measure curtain wall area, orientation, and glazing specification, and collect thermal performance data.

02

Energy assessment

You receive a report covering annual energy savings, electricity cost savings, carbon reduction, and payback period.

03

Custom manufacturing

Custom-made to measured dimensions, lightweight, and no modification to the existing curtain wall structure.

04

Handover & acceptance

Installed by a professional crew, typically completed in a single day for common spaces, with night-shift work available.

EXPERIENCE

Experience & Feedback

After the curtain lowers: softer light, less heat, and the view stays

Residential balcony full-wall west-sun window with ESEC curtain for softer light (AI scene)
Residential balcony · AI sceneThe sunniest full-wall window: softer light when lowered, translucent by day
Client feedback (AI scene): shading with the view kept; insulation, translucency, preserved vistas
Client feedbackInsulation, translucency, preserved views; every suggestion drives iteration

Run the numbers first, then decide whether to retrofit

Enter your building parameters into the energy calculator and get energy-savings and payback estimates in 30 seconds

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