Thanks to it's stainless steel diffuser adn a large 3/4" NPT opening on top, the EAS can eliminate more system air than any competing unit.
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Bell & Gossett Enhance Air Seperator "EAS"
I looked at them and they are pretty nice units but in the end B&G had a better mounting option and with the history behind them I decided to go that way.Pa Dealer wrote:Taco and spiravent make units like that.They really scrub out the air.
I'm just looking for an opinion here but I have all radiators installed in my house being fed from 3/4" Pex. I currently don't have an air seperator installed and I'm not really sure if I need one. If I had any air in the system wouldn't it just make it's way to the top of a radiator?
I too have all cast iron radiators in my house and use a air separator ( don't confuse these with air scoops and I'll explain in a bit) that way if any air is introduced to the system it will be removed before it makes it out to the radiators. Another thing that happens when air gets in the radiators you lose heating surface since the only thing heating the metal in that area is hot air. Another thing is to stay away from is painting cast iron radiators with metallic paint they look nice but metallic paint will reflect the heat back into the radiator and it loses some of its ability to give up heat to the space your heating. As a side note some old timers on gravity systems that it wasn't feasible to install a compression tank or open air expansion tank in the attic would over size a radiator or more and install the bleed valve in the middle npt hole and leave air space at the top of the radiator so the radiator itself would become a expansion tank. Now for the difference or drawback of a "air scoop" to a air separator is this as velocity in the pipe picks up the air doesn't have time to rise or collect in the top of the scoop and is just pulled thru the scoop not being removed, air separators are not affected by velocity since the water is pulled thru a media that the air collects on and then moves to the low pressure area at the top.mufwapo wrote:I'm just looking for an opinion here but I have all radiators installed in my house being fed from 3/4" Pex. I currently don't have an air seperator installed and I'm not really sure if I need one. If I had any air in the system wouldn't it just make it's way to the top of a radiator?
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Freddy
- Member
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- Joined: Fri. Apr. 11, 2008 2:54 pm
- Location: Orrington, Maine
- Stoker Coal Boiler: Axeman Anderson 130 (pea)
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The only issue with air seperators is cost! You could line up half a dozen air scoops for the cost of a seperator. A well designed system will work just fine with an air scoop. Although I do prefer a seperator on infoor radiant systems.... if they can afford radiant, they can afford a seperator. 
Freddy; your correct, cost can be a issue. One of the things I've seen people do with scoops is say come up of the boiler elbow and right into the scoop out the other side and either a elbow or a pump/s which makes the water turbulent and a scoop works best with smooth flowing water. I like your radiant comment I feel the same, in the end though you do get what you pay for.Freddy wrote:The only issue with air seperators is cost! You could line up half a dozen air scoops for the cost of a seperator. A well designed system will work just fine with an air scoop. Although I do prefer a seperator on infoor radiant systems.... if they can afford radiant, they can afford a seperator.