Both units feature an automatic altitude adjustment for optimal operation in high elevations of up to 7,218 feet. The Air Top Evo 40 has a maximum heat output of 13,650 Btu/h, and the Air Top Evo 55 has a maximum heat output of 18,800 Btu/h. Both heaters are available in 12-/24-volt diesel or 12-volt gasoline models and are designed for quick, easy installation as both a first-fit or retrofit solution.
Webasto Thermo & Comfort North America, www.webasto-products.com