Which main vents?

superMARKet

Here's a diagram of my steam system.

I initially figured on adding the Gorton vents that I've shown in blue, single #1s or pairs of #1s on manifolds. Then I second-guessed myself, so I doubled everything and went to #2s. That's what's shown in red.

Would I be better off with the venting shown in blue or in red?

How long should I expect it to take to vent these mains and risers with a 200MBH net boiler?

Steamhead (in transit)

Go with the larger vents

you can't lose. I bet they vent in 1-2 minutes this way.

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