Self-Contained Air Conditioner. Webasto Product North America, Inc. (WPNA) has announced the arrival of the all-new Webasto FCF 24,000 Btu Air Conditioner, the only self-contained 115 Volt / 24,000 Btu air conditioner on the market today. The FCF 24,000 will be joining the already popular FCF (“Feel Cool Fast”) family of marine self-contained air conditioners. The HVAC experts at Webasto have engineered this product utilizing a compact design to it fit in small places on board.