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The Preston’s Guide Twin-Volume contains the listings of nearly every make and model of air conditioner, heat pump and gas & oil residential forced air furnace produced in the United States and Canada over the past 45+ years.

This huge volume weighs just under four pounds and its 928 pp, 8-1/4" x 10-3/4", perfect-bound, twin-volume (two books in one cover) includes brand cross-references and lists the maker, type of equipment, model numbers, year(s) of manufacture, and the original factory specs on capacity and efficiency ratings.

The book pricing includes all shipping and handling charges.

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