installing auto air vents/ draining baseboard registers

[MasterPlumbersKeymaster]

I am going to install automatic air vents for baseboard heat. I have to weekly manually adjust.
Any ideas as how best to proceed and choose an auto air vent. Also, how to drain system. Thanks John

[Harold KestenholzParticipant]

A float type automatic air vent on the air scoop near the boiler and another at the highest baseboard in the sytem would be enough. They need to be used for a few weeks after the system is refilled to purge air left after a flushing purge of the loops, then kept closed to prevent air from reentering the system. It is a good idea to include a balancing valve boiler drain combination on the end of a loop to permit flushing air during a fill procedure. A boiler drain on the end of the zone valve loops will do. You can see some ideas for these at: http://www.hydronic.net at the free design lessons section.

[SylvanLMPParticipant]

Spiro BRONZE vents with a Stainless steel screen remove Micro bubbles and work continuously as I have installed lots of them.

FANTASTIC device made in Sweeden.
My cost is over $125 each BUT they work with out spurting water all over the place

[Author]

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