Welcome! Here are the website rules, as well as some tips for using this forum.
Need to contact us? Visit https://heatinghelp.com/contact-us/.
Click here to Find a Contractor in your area.

Hy vent installed in tee on return?

99JT
99JT Member Posts: 1
I'm in the process of installing a hydronic unit heater in my garage which is being supplied by the boiler in my house which has a taco air separator. 

Question is would their be any benefit to adding a tee with a hy vent in the return line which is by far the highest point in the system

Comments

  • STEVEusaPA
    STEVEusaPA Member Posts: 5,967
    Might be the highest part of the system, but on the return, probably suck in air. If you have a micro absorber air elimination anywhere on that loop, pumping away, it will take care of any air problem after initial purging.

    steve
    EdTheHeaterMan
  • hot_rod
    hot_rod Member Posts: 18,195
    On the unit heater, should be a supply and return connection. Whichever is the highest one. If connections are at the same level on the unit, either will work

    As long as you have 5 psi or more at that vent, you should not pull air in.

    Assuming near boiler piping is correct, pumping away from the expansion tank

    A manual vent would work, you should only need to purge it once on start up if you have a good air purger, shown by Steve, at the boiler 
    Bob "hot rod" Rohr
    trainer for Caleffi NA
    Living the hydronic dream