Hi there Grand Design owners. To hang your 2015 Grand Design reflection, we're gonna be taking a look at and showing you how to install Furrion's single zone thermostat. In addition to this, we installed an entire AC system onto Grand Design here. We use Furrion's air distribution box and Furrion's chill AC rooftop unit. You will need a thermostat to operate your system. So we're using one from… see more >