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  • Writer's pictureEnergy Performance Solutions

The Silent Threat: Solar Heat Load's Impact on Unprepared Equipment

In engineering and design, every element of a system is meticulously crafted and tested to withstand various environmental conditions. However, one silent assailant often goes overlooked until it's too late: solar heat load. As our world increasingly relies on technology, the damaging effects of solar heat load on equipment ill-prepared for its onslaught are becoming more apparent.


Sun rising over city causing an increase in solar heat load

Understanding Solar Heat Load


Solar heat load refers to the thermal energy absorbed by objects exposed to sunlight. When sunlight strikes surfaces, such as buildings or machinery, it heats them up. While this might seem innocuous at first glance, the accumulated heat can wreak havoc on equipment never designed to manage such thermal stress.


The Unseen Culprit


Many pieces of equipment, from industrial machinery to electronic devices, are not specifically engineered to handle solar heat load. These systems are typically tested and optimized for indoor use or moderate outdoor conditions but lack the resilience required to combat the intense heat generated by prolonged exposure to direct sunlight.


The Damaging Effects


The consequences of solar heat load on unprepared equipment can be severe and wide-ranging:

  • Overheating: One of the most immediate impacts of solar heat load is overheating. Components within machinery or electronics can reach temperatures beyond their operational limits, leading to malfunctions, reduced lifespan, or even catastrophic failure.

  • Performance Degradation: Solar heat load can compromise the performance of equipment over time. Delicate electronic circuits may experience accelerated aging or degradation, leading to diminished efficiency or reliability.

  • Material Degradation: Continuous exposure to high temperatures can degrade materials, causing them to warp, crack, or become brittle. This can compromise the structural integrity of equipment, posing safety hazards and necessitating costly repairs or replacements.

  • Energy Inefficiency: Equipment struggling to dissipate excess heat may consume more energy in an attempt to maintain operational temperatures. This not only increases operating costs but also exacerbates environmental impacts.

  • Safety Risks: In industries where equipment failure can result in safety hazards, such as manufacturing or transportation, the consequences of solar heat load can extend beyond financial losses. Malfunctioning machinery or electronics pose risks to workers and the surrounding environment.

Mitigating the Threat


Preventing the detrimental effects of solar heat load requires proactive measures:

  • Design Considerations: Engineers must incorporate strategies for managing solar heat load during the design phase of equipment. This may involve selecting heat-resistant materials, incorporating thermal insulation, or implementing passive cooling mechanisms.

  • Testing and Validation: Equipment should undergo rigorous testing to assess its resilience to solar heat load. Real-world simulations and environmental testing can reveal vulnerabilities and inform design modifications to enhance performance under sunlight exposure.

  • Operational Practices: Organizations should implement operational practices that minimize exposure to direct sunlight, such as shading equipment or scheduling maintenance during off-peak sunlight hours. Additionally, regular inspection and maintenance routines can detect early signs of solar heat-induced damage and prevent escalation.

  • Technological Solutions: Advancements in technology offer innovative solutions for managing solar heat load. ThermalBlock™ by Coat Zone® is one such solution. Trusted by industry leaders like AT&T, Hilton, and Carrier, ThermalBlock™ significantly reduces the thermal load brought on by solar exposure, especially experienced by rooftop-mounted equipment like rooftop package units, exposed ductwork, and rooftop air handlers.

ThermalBlock™ can be applied on-site to both new and existing HVAC systems, delivering considerable reductions in unit run-time, energy consumption, and utility bills. It's a green energy-saving solution that reduces your company’s carbon footprint and extends the life of the unit far beyond standard use. Moreover, it delivers rapid ROI on a minimal capital investment within 12-36 months.


When properly applied, ThermalBlock™ blocks 95% of solar heat, instantly reducing the exterior temperature of your unit to within 10°F of the ambient air temperature, even on extremely hot days. This produces substantial reductions in unit run-time, especially during peak demand hours, thus extending unit life, reducing maintenance and repairs, and reducing kilowatt per hour (kWh) consumption.


ThermalBlock™ has undergone extensive testing by independent laboratories, ensuring its effectiveness in mitigating the damaging effects of solar heat load on equipment. With solutions like ThermalBlock™, we can safeguard our equipment against the silent threat of solar heat load, ensuring reliability, efficiency, and safety in an increasingly sun-soaked world.


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