VETHY / FLEET AND OEM BUYER GUIDANCE
Compare cabin noise under the same cooling task.
A useful parking AC noise comparison states the measurement location, operating mode and cooling conditions. Compressor type and refrigerant name alone do not establish how quiet a system will sound inside a particular cab.
Define the listening and measurement position
Record the sleeper position, doors and windows, background sound and distance from the indoor outlet. Use the same measurement method for each configuration being compared.
A figure measured outside an outdoor assembly is not directly equivalent to a reading at the driver’s sleeping position. Ask what an advertised figure actually represents.
Match the operating task
Compare the same fan setting or, more usefully, the same required cabin condition. Document ambient temperature, initial cabin temperature and how long the system has operated.
A lower-speed mode may represent a different operating point. Record both comfort and sound rather than selecting only the quietest moment.
Include installation effects
Document mounting, panel contact, line routing and airflow restrictions. Have unusual rattles or changes assessed under the model’s service instructions instead of modifying mounts without review.
No acoustic-chamber result, named customer endorsement or fixed decibel reduction is provided by this guide.
Specify an acceptance check
Agree the observation method and acceptable operating behaviour with the buyer before the sample trial. Retain the vehicle configuration and recorded conditions with the result.
Use the fleet trial template and request the exact unit documents through technical enquiry.
Sources and specification records
Updated October 30, 2026. Model ratings follow the linked VETHY specification graphics. General technical sources explain principles; they are not certifications or tests of VETHY products.
FROM SELECTION TO A DEFINED PROJECT
Bring the vehicle brief.
Share the truck model, voltage, operating climate, installation photos and intended quantities. VETHY can review the proposed configuration and the evidence needed for your application.