Make Comfort Personal®. It’s not just a tag line or a marketing slogan. It’s what we do every day. No other company is as committed to creating environmentally friendly and affordable technology that’s ideal for today’s home, no matter the size or shape. Get the M-Series brochure to learn more about our single- and multi-zone systems for residential applications.

Reprint of rare original catalog includes huge illustrated selection of building materials, fixtures and trimmings, complete with descriptions, specifications, and prices. Hundreds of black-and-white illustrations.

Old-House Journal is the original magazine devoted to restoring and preserving old houses. For more than 35 years, our mission has been to help old-house owners repair, restore, update, and decorate buildings of every age and architectural style. Each issue explores hands-on restoration techniques, practical architectural guidelines, historical overviews, and homeowner stories--all in a trusted, authoritative voice.

Popular Science gives our readers the information and tools to improve their technology and their world. The core belief that Popular Science and our readers share: The future is going to be better, and science and technology are the driving forces that will help make it better.