Advanced ERV from Stirling Technology

Introduced in early 2004, the UltimateAir RecoupAerator 200DX is the only energy-recovery ventilator EBN is aware of that uses a brushless DC, variable-speed, electronically commutated permanent-magnet (ECPM) motor, though the Model SD95+ ERV that Stirling’s current model replaces also used an ECPM motor. The variable-speed motor allows the RecoupAerator to deliver 50 to 200 cubic feet per minute (cfm) (25 to 95 l/s) of airflow very efficiently, even when operating at low flow rates. Its average electrical consumption at 210 cfm is 200 watts; at 70 cfm the consumption is 34 watts. This, along with its very high heat-recovery efficiency (up to 96%), allows this product to achieve Oregon’s highest level of rebate.

“Stirling is the only manufacturer that has elected to use ECPM DC motors in their ERVs or HRVs,” according to Charlie Stephens, a policy analyst with the Oregon Department of Energy. “It’s truly unfortunate that others haven’t done so, because these products often run 24/7, and most of the time at low speed,” he told