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Pneumatic controlled heating system changeout ( Ron Jr. )
Pneumatics are the "1-pipe steam system" of controls! It looks like that system was a Rube Goldberg, but don't dismiss pneumatics out-of-hand. Parts and new assemblies are still available. Given clean, dry air, a pneumatic system will operate indefinitely, and provides modulating control as well. Yes, they CAN interface with electric and electronic systems, and can perform OA reset, and other advanced functions. Nice looking work, though. What's this with all that space? Usually, you install boilers in a spce you couldn't insert a putty knife. If you run across a pneumatic system that is worth saving, call me. The parts are available from any Honeywell commercial wholesaler.