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

If you’re replacing an old steam boiler there’s only one way to size it and that’s by getting an accurate measurement of the connected radiation. If you’re replacing an old hot water boiler it pays to check out the size of the old radiators because there’s a good chance that they’re too big. If you know what the radiation can do you can probably lower your operating temperature, and that saves fuel dollars.

The challenge, however, is that most of the records of all those old radiators and convectors have been lost to time. And without those records it’s anybody’s guess as to what the correct rating is. And that’s why I put this book together. Over the years, I’ve managed to gather a LOT of original manufacturers’ specifications on radiators and convectors. These include radiators that go back to the 1800s – radiators that had compartments in which you could warm your food, squat radiators that fit under low windows, radiators that were made of wrought iron tubes, circular radiators, pressed-metal radiators. And then there are the indirect radiators that hide in basement ductwork and warm the air that moves through those ducts. I also collected the specs on dozens of convectors that are so difficult to pin an E.D.R. number on nowadays.

I put all of these specs together in a book called E.D.R. Here you’ll find just about Every Darn Radiator (and convector) made between 1850 and 1950. I’ve included pictures of just about all of them so you’ll be able to match what you find on the job with the photo in the book and know for certain what you’ve got. I’ve included all those 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. It’s so good when you know the answer!

E.D.R. is 272 pages of nothing but radiators and convectors with their pictures and their ratings. I’ve included a preface about the effect of radiator enclosures and paint, and a Q&A about old radiators in general. We had E.D.R. printed on high-quality paper and we used 42 metal rings for the binding because I see this book as a tool that you’ll take into the field and use just about every day. It's not going to fall apart. There’s also a complete index in the back of the book, of course.

I think you’re going to like this one a lot. In fact, I personally guarantee your satisfaction. If you’re not delighted with E.D.R. you can return it to us for a full refund. But I don’t think you will; this is the sort of information that you simply can’t find anywhere else. And there’s a LOT of it here!

Dan Holohan


Products Comments & Ratings

Average Rating: 5.00 out of 5 (2 ratings)

( ) Posted by David on February 10, 2012 @ 10:49 PM

Dan: I loved this book! I like 'em all, My only request is: Could you make ALL your books spiral bound? I'm an old guy, and I'm using your books to teach future dead men. No matter how much I yell at them, they still tear up the paperbacks! I swear I could send you samples of these well-read books that look like they've been UNDER a boiler! But seriously, GREAT STUFF, Dan

( ) Posted by Al Letellier on November 8, 2009 @ 8:16 AM

Along with The Lost Art of Steam Heat, the two most used referenced books in my growing library of technical data. A must for any "steamhead" doing work on steam systems. Rarely do I find a radiator not included in this great reference book.

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