Qingdao Migo Glass Co., Ltd. is one of the most reliable manufacturers and suppliers of Solar Thermal Glass for Flat Plate Water Heaters in China. With abundant experience, we warmly welcome you to wholesale high-grade Solar Thermal Glass for Flat Plate Water Heaters in stock here from our factory. If you have any enquiry about custom service, please feel free to email us.
Products Description
MIGO Toughened Float Solar Thermal Glass is designed for flat plate solar water heaters and solar thermal collector systems, available in clear float glass and ultra-clear low iron float glass with 3.2mm and 4mm thickness options.
The glass is tempered to improve mechanical strength and provide reliable performance for outdoor solar thermal applications. Different optical grades can be selected according to the required balance between cost and solar transmission.
Product Specifications
| Item | Specification |
|---|---|
| Product Name | Toughened Float Solar Thermal Glass |
| Glass Type | Clear Float / Ultra-Clear Low Iron Float |
| Low Iron Content | <120 ppm |
| Thickness | 3.2mm / 4.0mm |
| Light Transmittance – Clear Float | >89% |
| Light Transmittance – Ultra-Clear | >91% |
| Solar Transmittance – Clear Float | ≥84% |
| Solar Transmittance – Ultra-Clear | >91% |
| Thickness Tolerance | ±0.2mm |
| Dimension Tolerance | ±0.5–1.0mm |
| Overall Bow / Warp | <0.2% |
| Local Warp | ≤0.3mm / 300mm |
| Fragmentation Test | ≥40 particles / 25cm² |
Clear Float vs Ultra-Clear Low Iron Glass
The two glass options are intended for different solar thermal project requirements.
Clear Float Glass provides a practical solution for standard collector designs where cost control is important.
Ultra-Clear Low Iron Float Glass contains less iron and provides higher listed light and solar transmission, making it suitable for projects that prioritize optical performance.
For the stated product data, clear float glass provides light transmission above 89%, while ultra-clear low iron glass reaches above 91%. Solar transmission is listed at ≥84% for clear float glass and >91% for the ultra-clear option.
The final selection should be based on collector design, required efficiency and project budget.
Why Choose Us?
Two Optical Grades Available
Customers can choose between clear float and ultra-clear low iron glass according to solar thermal system requirements.
3.2mm and 4mm Thicknesses
Both common thickness options are available for flat plate collector and solar water heater applications.
Controlled Dimensional Accuracy
Thickness, dimensions, diagonal difference and flatness can be controlled according to the stated product specification.
Tempered Processing
Tempering improves the mechanical performance of the glass for outdoor collector systems.
Project-Based Supply
MIGO can support customized sizes and batch orders for solar water heater manufacturers and solar thermal equipment suppliers.
FAQ
Q1. What is the difference between clear float and ultra-clear low iron solar thermal glass?
Ultra-clear low iron glass contains less iron and provides higher listed light and solar transmission than standard clear float glass.
Q2. Which thicknesses are available?
The standard thickness options are 3.2mm and 4.0mm.
Q3. Is this product intended for photovoltaic modules?
Its main application is flat plate solar water heaters and solar thermal collectors. PV module glass should be selected according to photovoltaic-specific requirements.
Q4. Why is tempered glass used for solar thermal collectors?
Tempering improves mechanical strength and helps the glass perform more reliably in outdoor collector systems.
Q5. Can the glass size be customized?
Yes. Dimensions can be produced according to collector drawings and project requirements.
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