DIY Home Improvement Forum banner


  1. Pnuematic vs. Electric motors for zoning of house

    I have a 2-stroy house that I want to zone, upstairs & downstairs, because currently the whole house is one zone. I have quotes to have dampers put into each supply line (16 total, 8 on each floor, all 6" lines) from 2 different contractors. One guy wants to use Arzel pnuematic dampers and...