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Although both residential glass sunrooms and agricultural glass greenhouses use glass as the primary covering material, there are significant differences in glass types, structural design, and performance parameters. Below is a detailed comparison:
Core Requirements: Aesthetics, safety, thermal insulation, soundproofing, UV protection.
| Glass Type | Parameters & Characteristics | Applications |
|---|---|---|
| Tempered Glass | - Thickness: 5-12mm (single or double-glazed) - Impact resistance: 3-5x stronger than regular glass - Safety: Shatters into granules (meets GB 15763.2) | Walls, roofs (when laminated) |
| Laminated Glass | - Thickness: 6.38-12.76mm (5mm glass + 0.38mm PVB interlayer) - Penetration resistance: Prevents falling objects and explosions - UV blocking: ≥99% | Roofs (anti-impact) |
| Insulated Glass | - Thickness: 12-24mm (5mm glass + 12mm air gap + 5mm glass) - U-value: ≤1.8 W/(m²·K) - Sound insulation: Reduces noise by 30-40dB | Walls (thermal & soundproofing) |
| Low-E Glass | - Thickness: 6-12mm (low-emissivity coating) - UV blocking: ≥70% - Energy efficiency: Heat insulation in summer, warmth retention in winter | Regions with extreme climates |
Thermal Break Aluminum:
Insulation bar width: 12-34mm
Wind resistance: ≥2.0 kN/m² (suitable for high-rise buildings)
Steel Structure:
Square steel thickness: ≥2.5mm (hot-dip galvanized for rust prevention)
Load capacity: ≥200 kg/m² (ideal for large-span designs)
Sealant: Weather-resistant silicone (elastic modulus ≥0.4 MPa, lifespan ≥20 years).
Drainage System: Concealed drainage channels with a slope ≥5%.
Shading: Electric shading blinds (80%-100% light blockage) or external louvers.
Core Requirements: High light transmission, ventilation, wind/snow resistance, low cost, durability.
| Glass Type | Parameters & Characteristics | Applications |
|---|---|---|
| Float Glass | - Thickness: 4-5mm (single-layer) - Light transmission: ≥91% - Cost: Low, but low impact resistance | Sidewalls of standard greenhouses |
| Tempered Glass | - Thickness: 5-6mm - Wind resistance: ≥1.2 kN/m² - Safety: Shatters into granules | Roofs in hail-prone areas |
| Diffused Glass | - Thickness: 4-6mm - Feature: Scatters light evenly, prevents crop sunburn | High-light regions (e.g., seedling greenhouses) |
Hot-Dip Galvanized Steel:
Pipe diameter: 25-50mm, zinc coating ≥80μm (lifespan 15-20 years).
Snow load resistance: ≥0.5 kN/m² (reinforced in northern regions).
Aluminum Alloy:
Thickness: 1.5-2.5mm, used in Venlo-type greenhouses.
Ventilation:
Roof vents: Opening angle ≥45°, motorized (air exchange rate ≥0.04 m³/s·m²).
Side roll-up films: Manual or motorized (ventilation area ≥30%).
Shading:
External shading nets: 50%-70% light blockage (aluminum or black knitted nets).
Insulation:
Internal thermal screens: PE material, U-value ≤3.0 W/(m²·K) when closed.
| Parameter | Residential Glass Sunroom | Agricultural Glass Greenhouse |
|---|---|---|
| Light Transmission | 80%-95% (Lower for Low-E glass) | ≥91% (Float glass) |
| Thermal Insulation | U-value ≤1.8 W/(m²·K) (Insulated glass) | U-value ≤5.0 W/(m²·K) (Single glass + screen) |
| Wind Resistance | ≥2.0 kN/m² (High-rise requirements) | ≥1.0 kN/m² (Standard regions) |
| Snow Load Resistance | ≥0.75 kN/m² | ≥0.5 kN/m² (Reinforced in the north) |
| Lifespan | 20-30 years (High-quality materials) | 10-15 years (Galvanized steel + float glass) |
| Cost | 2000-5000 RMB/m² (Premium configurations) | 300-800 RMB/m² (Basic models) |
Residential Sunrooms:
Prioritize laminated insulated glass (safe roof + insulated walls) with thermal break aluminum frames.
Focus on sealing and shading systems for comfort.
Agricultural Greenhouses:
Recommend 4mm float glass + steel frames (low cost, high light transmission) with roof vents and shading nets.
Use 5mm tempered glass in hail-prone areas; reinforce structures for heavy snow regions.
For further optimization, tailor materials to local climate conditions (e.g., typhoons, snowfall) and usage (planting vs. leisure).
