Number & Location of Air Vents in a Hyrdonic System
Number & Location of Air Vents in a Hyrdonic System
(OP)
I am trying to find recomendations regarding the amount of air vents required on a hydronic system serving radiant panels. The system consists of a main hot water supply line coming off of the buildings hot water riser and travelling down a corridor.
What would be reccomended?
- the main supply/return lines be elevated above the branch piping and point source so it is only necessary to air vent the main lines? or,
- the branch piping be elevated higher then the main supply/return lines and drop down to point source? This would require numerous air vents.
Also, is there a benifit to having the branch piping come off the top of the supply line as opposed to the bottom? Would this help with sediment control?
Thanks for your help
What would be reccomended?
- the main supply/return lines be elevated above the branch piping and point source so it is only necessary to air vent the main lines? or,
- the branch piping be elevated higher then the main supply/return lines and drop down to point source? This would require numerous air vents.
Also, is there a benifit to having the branch piping come off the top of the supply line as opposed to the bottom? Would this help with sediment control?
Thanks for your help





RE: Number & Location of Air Vents in a Hyrdonic System
I never go with bottom tapping. I always go up. If space doesn't permit I would go at sides with shoe joint.
RE: Number & Location of Air Vents in a Hyrdonic System
Quark, if you go with a top tapping with branch piping don't you find you need more air vents? I would seem like the arrangement may be prone to air lock.
RE: Number & Location of Air Vents in a Hyrdonic System
Another question...Does anyone know if standards exists which state that an air vent is required every X number of meters/feet for a given pipe size with a certain flow rate? I have inquired about this information from manufacturers of air vents but have not received any significant information. They continue to state that they are required at the high points but I feel there must be more to it then that.
RE: Number & Location of Air Vents in a Hyrdonic System
RE: Number & Location of Air Vents in a Hyrdonic System
I don't feel that we should provide multiple air vents with respect to length of the piping.
Regards,