This book contains specs for almost every radiator (and convector) made between 1850 and 1950. Pictures of radiators are included, so you'll be able to match what you find on the job with the photo in the book. Gorgeous Victorian radiators with the scrollwork along with wall- and ceiling hung radiators, panel radiators and even the elusive Weil-McLain Cabinet Raydiant units that stump so many heating professionals each year are included in this useful book. E.D.R. is 272 pages of radiators and convectors with their pictures and their ratings. Also included is a preface about the effect of radiator enclosures and paint. Plus, a Q&A about old radiators in general.