If you’ve ever wondered how manufacturers ensure their products can survive tough, humid environments, the 85/85 damp heat test is where it starts. This test exposes materials and electronics to a constant 85°C temperature and 85% relative humidity for hundreds of hours—simulating decades of real-world stress in just days. Whether you’re in solar, electronics, or automotive, understanding this test is key to predicting long-term reliability and avoiding costly failures. Ready to unlock how the 85 85 damp heat test protects your products and why it’s a must-have in quality assurance? Let’s dive in!
If you’ve wondered what the 85/85 damp heat test is, you’re not alone. At its core, this test is an accelerated environmental stress screening method designed to evaluate how well materials and products hold up under harsh heat and humidity conditions. The “85/85” refers to the test parameters: a constant temperature of 85 degrees Celsius combined with 85% relative humidity. This creates a controlled but aggressive environment that simulates long-term exposure to heat and moisture in a compressed timeframe.
This test is especially important because high temperature combined with moisture speeds up the breakdown processes that products might face outdoors or in harsh climates.
The 85/85 test has roots in early reliability testing developed in the mid-20th century. It evolved as industries like electronics, photovoltaics, and automotive sought more efficient ways to predict product lifespan without waiting years for real-world results. By applying rigorous heat and humidity stress, manufacturers could quickly pinpoint weaknesses and improve designs before mass production.
The test requires specialized double 85 test chambers that precisely maintain the temperature and humidity setpoints. These chambers are typically equipped with:
Compared to other environmental tests, the 85/85 damp heat test is focused specifically on consistent, extended exposure rather than cycling conditions. This makes it ideal for assessing corrosion resistance and moisture ingress rather than shock or thermal cycling.
Standards like IEC 61215 for photovoltaic (PV) module reliability and UL 1703 often include the 85/85 test as part of their certification process. Knowing the exact parameters and test chamber capabilities ensures your product meets the latest compliance demands while streamlining your quality assurance.
At Dexiang, we specialize in manufacturing precision double 85 test chambers designed to deliver reliable and repeatable damp heat testing that aligns with these key global standards. If you want to understand more about how this test fits your product’s reliability needs, keep reading—we’ll break it down step-by-step.

Heat and humidity together speed up how materials and electronics wear out. When devices face the 85/85 damp heat test—85% relative humidity at 85°C—they undergo stress that pushes their limits faster than usual.
Moisture seeps into tiny cracks or porous materials. This water build-up leads to corrosion, especially on metal contacts and electronic circuits. Corrosion breaks down connections, causing failures. The warm environment speeds chemical reactions, making corrosion happen quicker.
In the solar industry, PV modules tested under 85/85 conditions often reveal weak spots like frame corrosion or encapsulant delamination within weeks, instead of years in real weather. This helps manufacturers fix designs before mass production.
Understanding this science lets us appreciate why the 85/85 damp heat test is crucial for ensuring reliability in electronics, automotive parts, and solar materials.
The 85 85 damp heat test is a go-to for many industries in the U.S. where product reliability under tough humidity and heat conditions is critical. Here’s a quick look at where it’s most common:
Using the 85 85 test helps companies meet key standards like IEC 61215 for solar modules and UL 1703 certification for safety. Passing these tests means:
| Industry | Key Benefit | Certification Supported | Main Failure Mode Checked | 
|---|---|---|---|
| PV Solar | Verified module reliability | IEC 61215, UL 1703 | Moisture-induced corrosion | 
| Electronics | Prolonged component life | JEDEC, IPC standards | Insulation breakdown, corrosion | 
| Automotive | Improved part durability | OEM specifications | Material degradation, shorting | 
| Materials | Enhanced protective coating life | ASTM standards | Delamination, swelling | 
If you’re in the U.S. market and working with humidity-sensitive products, the 85 85 damp heat test is essential to prove your product can handle the real world. It builds confidence and opens doors for selling in a competitive landscape.
Performing the 85/85 damp heat test properly is key to getting reliable, consistent results. Here’s a straightforward guide on how to do it:
1. Specimen Preparation
2. Chamber Calibration
3. Exposure Process and Monitoring
4. Post-Test Analysis
Typical Challenges
Following these steps ensures your 85/85 damp heat testing is effective, helping you assess product durability against extreme heat and humidity with confidence.
When it comes to the 85 85 damp heat test, staying on top of standards is crucial for ensuring your products meet industry expectations. Various global and local standards guide how this test should be done, especially in sectors like electronics, solar, and automotive.
| Standard | Temperature | Humidity | Duration | Purpose | 
|---|---|---|---|---|
| IEC 61215 | 85°C | 85% RH | 1000 hours | PV module damp heat reliability | 
| UL 1703 | 85°C | 85% RH | 1000 hours | Safety certification for PV modules | 
| JEDEC JESD22-A102 | 85°C | 85% RH | Varies hours | Electronic components aging test | 
| MIL-STD-810G | 85°C | 85% RH | Varies | Environmental stress screening | 
Our Dexiang double 85 test chambers are designed to meet and exceed these standards. Here’s what makes them stand out:
Choosing Dexiang means your testing stays compliant with key industry standards while enjoying dependable performance. Reach out to us for a consultation or to learn more about how our chambers can fit your testing needs.
At Dexiang, we specialize in manufacturing high-quality Double 85 test chambers designed to deliver precise and consistent results for the 85/85 damp heat test. Our chambers are built with advanced technology to maintain stable temperature and humidity levels—typically 85°C and 85% relative humidity—for extended periods. This makes them ideal for accelerated humidity testing across industries like solar PV, electronics, automotive, and materials science.
Dexiang has decades of experience providing environmental test solutions tailored for the U.S. market. Our manufacturing process combines durable materials, smart control systems, and user-friendly interfaces. This ensures each Double 85 test chamber meets rigorous compliance standards such as IEC 61215 and UL 1703 certification requirements, giving you confidence in your product testing and certification.
A leading U.S. solar panel manufacturer chose Dexiang chambers to improve their PV module reliability tests. Since switching to our Double 85 test chambers, they have noticed more consistent test data and reduced downtime thanks to our reliable environmental control systems. This has helped speed up their certification process while ensuring high product quality.
As an experienced environmental test chamber manufacturer, Dexiang provides dependable solutions for extended damp heat exposure testing. Our team is ready to help you select the right Double 85 test chamber, ensuring your products meet critical environmental stress screening requirements with confidence. Contact us today for a consultation or quote.
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