Spartan Sol Solar Ventilation Fan for 3" 4" Pipes Spartan Sol Solar Ventilation Fan for 3" 4" Pipes Solar Ventilation Fan - Universal Fit for 3? and 4? Pipes - Portable Exhaust Fan For Porta Potty, Sheds, Dog Houses, Green Houses - Compact size 6?x6?x4.5? Used. In good condition. Fits directly on 3'' pipe and in 4'' pipe (abs/pvc) The weatherproof design repels water/rain/snow providing years of reliability Fan produces 40 CFM with a lifespan of 40,000+ hours 2.7 Watt solar panel produces reliable energy hours before the competition Porta Potty Ventilation Fan *Solar powered products require direct sunlight* **Fan produces 40 CFM of air flow, larger spaces may require multiple units to properly ventilate the structure** See pictures for details. (description exceeds maximum possible length)