If you're replacing a steam boiler, there's only one right way to size that boiler, and that's to measure the radiators. If you're replacing a hot-water boiler, you'll do a heat-loss calculation on the building as it is today, but it also pays to measure the radiation to see if you can reduce the water's temperature and save fuel. The challenge, though, is that it's often difficult to find the ratings for many of those old radiators and convectors, and that's why I compiled this book. I've been saving heating books and heating-manufacturers' literature since 1970. I have a lot of this stuff. E.D.R. is 272 pages of nothing but radiator and convector ratings and if that old unit is out there in the field, it's probably also in this book. This is a terrific resource for any heating professional who wants to get it right the first time.

This was my first book and a true labor of love. I spent decades studying steam and the work of Dead Men, in both old buildings and on library shelves. I traveled the country, haunting used-book stores, looking for engineering books that held the answers to questions that nagged at me. I was obsessed with this topic, and when I finally sat to write, I poured all that I had learned into this book, and as I wrote, I tried my best to make the words sound good to you - like we were together and having a conversation. I wanted you to know what I know and I wanted you to be able to do what I can do when it comes to old steam systems. This book arrived in 1992 and has since gone though dozens of printings. We've sold it in every state as well as in foreign countries. Steam heat is everywhere there are old buildings, so why shouldn't you be the one with the answers? Dan Holohan

Written for the boiler operator who has knowledge and experience, but would like to learn more in order to optimize his performance, this text is also clearly-presented enough to be an indispensable guide for those beginning their careers, as well as being suitable for managers and superintendents interested in reducing a facility's operating expense. Based on the author's forty years of experience in boiler plant operation, design, construction, start-up, retrofit and maintenance, it contains absolutely key recommendations to operators and managers of plants large and small.

I wrote this book to describe the beautiful workings of hydronic heating systems and I tried to use words that made the subject spring to life in a visual way. It's been one of my best-selling books for years. I kept the drawings simple. Even if you've never worked with hydronics before, you'll be able to follow these drawings. The first part deals with boiler-room piping and explains how you can put the discoveries of the late, great Gil Carlson to work for you. If you pipe Gil's way, you'll save time, money and never again have to bleed radiators. Thousands of installers have reported great success by following the principles in the first part of this book. I wish I could take credit but the genius was Gil Carlson's. I just did my best to tell his story in plain English. The second half of the book takes the "Pumping Away" boiler-room piping design and applies it to a delicious menu of piping options. This is a book that you'll refer to again and again. It will save you time and money. And I guarantee that. - Dan Holohan

If you're a homeowner with steam heat, know that I wrote this one for you. If you'd like to fix uneven heat and squirting air vents or want to reduce your fuel bills and silence clanging pipes, then arm yourself with this book and smile. This is not a do-it-yourself book. Here's what you'll learn: How your steam-heating system works (and why it might not) What each component does (or what it's supposed to do) Why high pressure in a steam-heating system won't work How the choice of fuels can affect your system What causes all that noise (and how to get ride of it once and for all) Simple ways to lower your fuel bill What you can do yourself When you should keep your hands in your pockets How to find a steam-heating pro (and how to avoid the knuckleheads) Things that should be in every contract you sign for steam-heating work The right questions to ask when replacing a boiler How to fix, move, clean, paint and/or replace an old radiator How to have a hot-water zone added to your steam-heating system How to know if you can have your steam-heating system converted to hot-water heat And a whole lot more Arm yourself with this book. You will not be sorry. Dan Holohan

THE DEFINITIVE ANTENNA REFERENCE--FULLY REVISED AND EXPANDED! Design and build your own antennas with the help of this unique guide. Updated and revised to provide clear answers to questions frequently asked by hobbyists and electronics technicians, Practical Antenna Handbook, Fifth Edition blends theoretical concepts with hands-on experience--requiring only high school mathematics Reorganized to flow logically from broad physical principles to specific antenna design and construction techniques, the book begins by covering the fundamentals. Then the half-wave dipole is discussed both as an excellent antenna in its own right and as a conceptual tool for predicting the performance of other designs. Transmission line impedance matching techniques--and a companion Smith chart tutorial--lead into "must have" accessories for tuning, monitoring, and troubleshooting antenna system performance. Other tools, such as antenna modeling software and network analyzer add-ons for PCs and Macs, are addressed, and concluding chapters offer fresh insights into support structures and installation techniques. NEW TOPICS COVERED INCLUDE: Characteristics of all-driven and parasitic arrays Beverages and small MF/HF receiving loops Top-loaded shunt-fed towers and other verticals Theory and design of Yagi beams Effect of real ground on propagation and antenna patterns, impedance, and efficiency Lightning protection and four kinds of ground systems Zoning and restrictive covenants COVERS A WIDE VARIETY OF ANTENNAS: Dipoles and inverted-Vs Quads, delta, and NVIS loops Wire arrays (bobtail curtain, half-square, rhombic) Verticals and shunt-fed towers Rotatable Yagi beams MF/HF receiving antennas (flag, pennant, K9AY, Beverage) Mobile and portable antennas VHF/UHF/microwave antennas And many more GO TO WWW.MHPROFESSIONAL.COM/CARR5 FOR: * Tables of worldwide geographic coordinates and antenna dimensions vs. frequency * Supplier updates * Author's blog * Additional photographs and schematics * Links to tutorials and specialized calculators

I was fortunate to have had the late, great Gil Carlson as one of my teachers. He invented primary-secondary pumping in the early '50s and went on to do many other things. Over the years, I've watched a lot of trial and error with primary-secondary heating systems. That's a shame because guesswork costs both time and money. In this book, I've used what Gil taught me to show you how to reduce the size of your pipes, valves, fittings and pumps, and how to lower heating system temperature, and all without sacrificing performance or getting into trouble. This book covers two-pipe primary-secondary heating systems, as well as one-pipe heating systems. It shows how to get the most out of two-, three-, and four-way valves, as well as injection pumping. I also give you lots of options for your boiler-room piping (for both single- and multiple-boiler systems). It's loaded with diagrams and I went easy on the math because you may not be an engineer (and neither am I). This book will save you time and money and keep you out of trouble. It is not a primer, but it is easy to understand. - Dan Holohan