We Have Thousands Of Genuine Lennox HVAC Repair Parts, Filters and Accessories In Stock Ready To Ship Right To Your Home. Order From HVACPartsShop Today!.ZONEFIRST is a leading manufacturer of HVAC Zone Dampers, Zone Controls and Zoning Systems. TODAY!.ZONEFIRST carries everything you need in HVAC Zoning! From dampers, control panels, to replacement motors ..I am in the process of selecting a contractor for a replacement furnace and air conditioner in Minnesota. One contractor stood out as trying to meet our needs and sizing things properly including lo.ng at all supplies and returns ..