maintain your rv > dometic comfort setting and it automatically rain sensor that closes the dome and turns off the fan when the sensor becomes wet; the dome reopens when the sensor dries automatic deluxe standard let us install it- add more features to your existing model! call or go online for details item # 14-speed manual auto variable built-in thermostat automatic opening rain sensor hand held remote reverse airflow amp draw heng's fits all 14" x 14" roof openings clear lid allows more natural light in! 14" x 14" roof vent assembly or add extra ventilation whisper quiet fan features 3 forward speeds and odorous air let us install it-- members sale $139 let us install it - members sale $86.18 zephyr vent with high-velocity fan fan features 3 forward speeds and 2 reverse speeds and can move up to 920 cfm of air let us install it -- members sale $139 up to 300% better air flow maintain your rv see page 223 for details | catalog & internet only