An air-management system on the FreshAir fireplace eliminates the need for a glass front. Instead, an integrated heat recovery ventilator provides a balanced combustion system that constantly ventilates the home at a rate of eight whole-house fresh air changes every 24 hours, resulting in improved whole-house air quality and energy savings. Heatilator. 877.427.8368. www.freshairfireplace.com.Circle 464