Vehicle Cabin Thermal Load Under Nano-Ceramic Glazing Film: District-Level Field Measurements, Jeddah (2024-2026)

District-aggregated field measurements of vehicle interior temperature, infrared and ultraviolet rejection, and air-conditioning energy draw before and after nano-ceramic window film installation, collected across ten districts of Jeddah, Saudi Arabia. Why this dataset exists Manufacturer specifications for solar-control window film are produced under laboratory conditions. They describe how a film behaves against a calibrated lamp, not how a parked vehicle behaves after four hours in a coastal desert summer. Published field data for the Arabian Peninsula is scarce, and installers, fleet operators and building engineers in the region are left extrapolating from temperate-climate figures. These measurements were gathered during routine commercial installation work and are released so that the gap is a little smaller. The coastal/inland/urban-core split is the part we consider most useful: humidity varies from 46% to 85% across the same city, and the data shows how differently that loads the cabin. Method Measurements follow ISO 13837:2021, the road-vehicle standard for determining solar transmittance. Each vehicle was parked in unobstructed sun for a minimum of four hours before measurement. Cabin temperature was recorded with a FLIR T530 thermal imaging camera (320x240, +/-2 C, emissivity 0.95) at a fixed position 1.2 m from the centre of the driver seat. Post-installation readings repeated the identical protocol after a minimum 48-hour film curing period. Values in the CSV are district means, not individual vehicle records. The sample_size column gives the number of vehicles behind each row and sums to 530. Limitations Read these before citing the numbers. Aggregated, not per-vehicle. Each row is a district mean. Variance within a district is not recoverable, so the data cannot support significance testing. Not randomised. Vehicles were customer vehicles presenting for installation, not a random sample of the Jeddah fleet. Vehicle colour, glazing area and cabin volume were not controlled for. Single film class. Results describe nano-ceramic film as installed. They do not transfer to dyed, metallised or hybrid films. Energy savings are the weakest column. AC energy draw was derived under normal driving rather than on a dynamometer, so treat energy_savings_pct as indicative. Regional scope. Jeddah is hot, coastal and high-UV. Do not extrapolate to temperate climates. Standards and reference material ISO 13837:2021 - Road vehicles, safety glazing materials, determination of solar transmittance ASHRAE Standard 90.1-2022 - Energy Standard for Buildings Except Low-Rise Residential Saudi Building Code SBC 601/602 - energy conservation requirements (sbc.gov.sa) International Window Film Association - installation and performance terminology (iwfa.com) World Health Organization - Global Solar UV Index, a user guide Source publication The full study, including the building HVAC dataset and the UV material-degradation test, neither of which is part of this deposit, is published by the AzelCore Research Division as KSA Thermal Rejection and HVAC Energy Report 2026. The thermal imaging protocol behind these measurements is documented in AzelCore write-up of FLIR thermal testing.