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# Arco Convector

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Member Posts: 67
How do you size how much air is in Arco Convector?  Width 5 5/8 various length 23" to 60".   I am trying to balancing all the radiators.   I have balance the main header 2"  60" long X .023 cubic air per feet = 1.38 divided by 3 minutes (open vent pipe steam time from header to vent) = .460 cfm.   I am trying to find the same formula for the Acro Convector radiator

thanks

Dan

d

• Member Posts: 1,484
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Arco

I was just looking at Steve and Gerry's "Balancing Steam Systems Using a Vent Capacity Chart"  toward the end of the document, Cast Iron Convector (in cabinate) is listed as having .0003 cu. ft. of air, per square foot of EDR.

How much EDR each convector has is listed in this PDF from the library here.

http://www.heatinghelp.com/files/posts/9836/Crane.pdf
• Member Posts: 67
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arco convector

crash thank you   do the math now
• Member Posts: 67
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arco convector

sorry  doing the math now   once again thank you for the help

dan
• Member Posts: 1,484
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Wait

there's a calculator, you just put the numbers in and it figures it out for you.  I'll look for it and post it. 5 minutes.......
• Member Posts: 1,484
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I am unable

to get the calculator working correctly with my current version of excel.  Maybe you will have better luck.  http://www.ypgmedia.com/heatinghelp/
• Member Posts: 67
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Arco Convector

thank you for the worksheet.  But I am confuse. The book by Dan  "Greening Steam"  Chapter 6 page 134  Cast-iron convector (in cabinet) is .0003 per sq ft EDR.   The worksheet is set at .01.   All the valves are just one point above what I figure.   It is nice to have somebody else to the math.

As Always thank you  for your time

Dan
• Member Posts: 1,484
edited October 2012
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Yes,

that is the same problem I had.  I didn't really have time to mess with it a couple nights ago.  Here is something you could try that worked for me.

change sq ft edr to 1, and runout length to 1,

CFM to vent now reads  .003

I realise that there is a big difference between .003 and .0003  I don't know why the discrepancy, however, I believe the calculator will get you close.
• Member Posts: 1,484
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Also, when it comes time

to consider vents for your convectors, consider the Ventrite #1.  Ventrite #1 is a good quality vent with very fine adjustability.  They are kinda hard to find at your local store but there are a few places on the internet.  They are a little more money, but I think they are worth it.

http://www.emersonswan.com/manufacturers-products/vent-rite.html

http://controlscentral.com/eCatalog/tabid/63/ProductID/333573/Default.aspx
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