Desert Spring DS-PFT Humidifier Small Bypass/Mechanical Control Fantech VHR Series it may be possible that

it may be possible that some control functions are not compatible to some earlier unit models

Broan AI Series V210E75RT ERV Features

500DCS(Q4) 350DCS(Q4)

8 mm x 304

Unit Dimensions: Ht: 16

Desert Spring DS-PFT Humidifier Small Bypass/Mechanical Control Fantech VHR Series it may be possible thatDesert Spring DS PFT Humidifier Small Bypass Mechanical Control Part# DS PFT, Desert Spring Humidifier. What is a Bypass Humidifier? BY PASS humidifiers are water based. They will use the pressure difference between the furnace supply plenum and the return plenum to move air through the humidifier. This is achieved by adding a 6 inch round connecting duct between plenums (CATEGORY = GOOD) What is a Fan Powered Humidifier? POWERED humidifiers are water