Used for measuring the heat transfer coefficient and anti-condensation factor of building envelope such as outer window, outer door and curtain wall.Adopting the international universal calibration heat box method, automatic measurement and control system with reasonable laboratory transformation, fully meet the current national standards.The device can also measure the heat transfer coefficients of materials such as walls, lighting shades, solar panels and insulating glass. 1. Product introduction GB/T 8484-2008  Graduation and test method for thermal insulating properties of doors and windows. GB/T 13475-2008  Thermal insulation – Determination of steady-state thermal transmission Properties – Calibrated and guard hot box. 2. Main technical parameters （1）The environmental space should ensure the minimum distance of 0.5 meters around the equipment, and the box door should be fully open. （2）power supply: AC380V  16kW （3）Temperature  accuracy: ≤0.02℃ （4）temperature control accuracy：Hot chamber: ＜0.1℃   Cold chamber：≤0.3℃ （5）Control wet system: Heat chamber relative humidity≤20% （6）Maximum heating power of hot chamber: 1200W （7）Lowest temperature of cold chamber: -25 ℃ （8）test way: Automatic detection is adopted 3. Model Specifications

model	Max size of test piece	Case size(L×W×H)	Min room size(L×W×H)
BHR1515	1500×1500mm	4110×2330×3030mm	5110×3330×4230mm
BHR1818	1800×1800mm	4110×2630×3330mm	5110×3630×4530mm
BHR2424	2400×2400mm	4110×3230×3930mm	5110×4230×5130mm
BHR3030	3000×3000mm	4110×3830×4530mm	5110×4830×5730mm
BHR3642	3600×4200mm	4110×4430×5730mm	5110×5430×6930mm

【Product Features】 1. Made with one-piece molded polyurethane panels, each prefabricated panel has high-strength locks embedded around its perimeter, providing good sealing and easy assembly. Specially designed corner panels and T-shaped panels make it very convenient to assemble laboratories of different sizes and temperature requirements. 2. All temperature sensors use internationally recognized high-precision Pt1000 platinum resistance, sparing no cost to ensure accuracy. High-quality, high-power refrigeration units are used for rapid cooling, improving testing efficiency. 3. Advanced data acquisition and processing system, with all test curves displayed accurately and stored for long-term use, capable of automatically analyzing the test results and outputting inspection reports timely and accurately. 4. The humidity control system uses a dedicated dehumidifier, with control accuracy fully meeting the requirements of the new standards. 5. Reports and original records are processed using Microsoft Word, allowing users to modify and create their own formats. The software includes the report format from the National Building Engineering Quality Supervision and Inspection Center for user reference. 6. Dedicated measurement and control software is developed by experienced testers using Windows95/98/2K/XP platforms with VB/VC mixed programming, providing a convenient and flexible human-machine interface to control the entire testing process. 7. Open Access database management system with strong compatibility, capable of seamless integration with any management software.