E.D.R.: Ratings for Every Darn Radiator (and convector) you'll probably ever see

If you are replacing radiators, you need this book. Excellent explanation for how to calculate output of cast iron and convection units.

Pleased with purchase. Provide's information about systems that some consider obsolete. Little do they realize how many of these"obsolete' systems are in operation. Information about how it is should work is required before you can properly repair a system or the devices installed on the system.

Best reference on the planet. Highly recommended for anyone interested in Heating Radiators.

not what i expected. not even close to "every darn radiator". basically just xerox copies of original radiator spec sheets. good reference material if you're lucky enough to have a radiator that's listed. i've attempted to use it 4 or 5 times recently and at best found 1 radiator that i could match up the sizes close enough...