thin tube (water type) radiator?

SeanBeans · October 2017

I ordered EDR by Dan but unfortunately it isn't here yet. I have a house that has identical reds and these are what they look like.. are these thin-tube (water-tube) radiators? as seen in TLAOSH?

thanks in advance!

there is a small stamp if you zoom in labeled "SD"

SeanBeans · October 2017

AMservices · October 2017

Yes that a water tube radiator. The chart you posted will work to find the EDR

Dave0176 · October 2017

That looks more like the Slenderized radiator .

Dave0176 · October 2017

Chart

kcopp · October 2017

how wide?

Steamhead · October 2017

@Dave0176 is correct. Those are small-tube or "slenderized" (Burnham's trademark) radiators. If there is any question, the section spacing of small-tube rads is 1-1/2" or 1-3/4", whereas the older large-tube ones is 2-1/2".

The ones shown in "Lost Art" are large-tube radiators.

And to make things even more interesting, American Radiator Co. made a version of the Corto tube-type rad with 2" section spacing from about 1920-1925. The chart for these is here:

https://heatinghelp.com/heating-museum/corto-radiators/

Later versions of the Corto used the standard 2-1/2" spacing.

JohnNY · October 2017

I use the Governale charts for those radiators:

SeanBeans · October 2017

so there are only 4 rads in this house, small house. and one cast iron baseboard.
I came up with an edr of just above 150 using @JohnNY 's chart
and just below 150 using @Dave0176 's chart.

looking like the force mts03 will be used.

unless there is a boiler smaller than that.?

Dave0176 · October 2017

Burnham IN3 puts out 158 sq from steam.

thin tube (water type) radiator?

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