Cast-Iron Hot Water Radiators: Volume and Ratio

"Who has a Table of Water Volume for Hotwater Cast Iron Radiators? If no table is available what Rule-of-Thumb is used in the Plumbing Industry to estimate Water Volume in these Radiators ( Radiator Type & Form included)?"

Consult the radiator manufacturer(s) or fill the system metering the input volume as you will need the total volume to determine the amount of anti-freeze needed.

"Also, what is the ratio of anti-freeze to water in these units for freeze protection (Factored for various temperatures)?"

Every jug of anti-freeze has a table of percent of product required for protection to a list of temperature. You will then have to calculate the amount to add and remove that much water to make room for the anti-freeze.

1. Weigh it empty.
2. Weigh it full.
3. Calculate the difference.
4. Divide the difference by the density of water at the measuring temperature.

If a frost thermostat is placed in the loft-space of the home and set to close the contact below, say, 2degC, and wired to over-ride the system programmer, then no antifreeze is required. A combination corrosion inhibitor and antiscalant additive is a good idea, however.

my answer may seem to simple or I don't understand the question.

why not fill the radiator with water, then drain into a container and measure the weight or volume?

Kenn

"why not fill the radiator with water, then drain into a container and measure the weight or volume?"

Do Nothing Simply when it can be made Complex & Wonderful

I would keep this one simple stupid "figure of speech of course" and consider that a gallon of antifreeze will safely freeze protect 2 gallons of water in a 3 gallon system then that is what I would apply by hand measurements with a gallon jug till full if I thought that The system might freeze!

Check this link for some help on radiators

http://www.fwwebb.com/pdf/htgcat03/2003htgcat_p221-222.pdf