The Flex 100H heat-recovery ventilator is designed for homes with less than 2,000 square feet of floor space. In Eco mode the fan runs continuously at the speed needed to maintain the home’s preset temperature and relative humidity. The maximum continuous speed is 100 cfm, but Turbo Touch mode lets the user boost output to 150 cfm for 20- to 60-minute intervals, which means the HRV can double as a bathroom exhaust fan. The company’s EcoTouch Controller (sold separately for $130) has a dedicated button for the Turbo Touch feature. The Flex 100H costs about $920.

Fantech, 800/747-1762,

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