1. Preferred type of glass: Insulating glass (double or multi-layer)
Insulation principle: Dry air or inert gas (such as argon) is filled between two layers of glass to form an insulating layer, effectively reducing heat loss.
Recommended configuration
Double-layer insulating glass: The thickness of the air layer is recommended to be ≥12mm. In extremely cold regions, triple-layer insulating glass can be selected.
Low-E coated insulating glass: A low-emissivity film is coated on the inner side of the glass to reflect far-infrared rays and enhance thermal insulation (suitable for extremely cold regions with weak light).
2. Selection of glass material
Tempered glass (preferred)
Its strength is 3 to 5 times that of ordinary glass, and it has strong resistance to wind pressure and snow load.
It breaks into granular form and has high safety.
Ultra-white high-transparency glass
The light transmittance is ≥91%, reducing the loss of light refraction and ensuring the light requirements of plants under weak light conditions.
3. Key performance parameters
Heat transfer coefficient (U value) : The lower, the better (the U value of insulating glass can reach 1.1-2.0 W/(m²·K)).
Light transmittance: Select glass with visible light transmittance greater than 90%, taking into account both heat preservation and lighting.
Impact resistance: It must pass the hail test (such as the EU EN 13583 standard).
4. Special technical enhancement solutions
Vacuum glass: It has excellent heat insulation (the U value can be as low as 0.4 W/(m²·K)), but it is expensive and needs to be protected from damage.
Dynamic dimming glass: It regulates light transmittance through electrochromism or thermochromism, but it is expensive.
5. Supporting measures
Sealing system: Warm edge spacers (such as stainless steel, composite materials) are used to reduce edge thermal Bridges.
Installation Angle: Reasonably design the inclination Angle of the glass to reduce snow accumulation and enhance light transmission.
Auxiliary insulation: At night, insulation blankets, internal shading systems or transparent honeycomb panels can be installed for local reinforcement.
6. Economical alternative solutions
If the budget is limited, you may consider:
Polycarbonate hollow board (multi-layer structure) : It has good thermal insulation, is lightweight and impact-resistant, but it may age and yellow after long-term use.
The combination of double-layer glass and single-layer polycarbonate sheet strikes a balance between cost and performance.
7. Additional recommendations for extreme weather
Heating system: Combined with auxiliary heating such as warm air fans and floor heating.
Intelligent monitoring: Install temperature and humidity sensors to automatically adjust the insulation facilities.
Windproof design: Strengthen the frame structure to ensure sealing and prevent cold air from penetrating.
Summary and recommended configuration
The optimal combination for extremely cold regions
Low-E coated tempered insulating glass (three-layer) + warm-edge spacer bar + intelligent temperature control system
If cost is limited, double-layer tempered insulating glass with polycarbonate lining can be chosen as a compromise solution.
