CertiSpec3, a computerized sizing guide of water heaters, is now available on the company’s website. One feature of this version includes a fuel cost calculator, which draws comparisons of annual fuel consumption for gas vs. electric units, as well as 80%-efficient models vs. the 95%-efficient AdvantagePlus. Also included are sizing calculations for low-NOx as well as conventional gas units. Other features include a table that helps one calculate various combinations of water heaters and storage tanks to meet the demands of larger applications and a table that offers a cross-reference guide to small-volume ASME units for both the company’s and competitor’s models.

Rheem Water Heaters, P.O. Box 244020; Montgomery, AL 36124-4020; 800-432-8373; www.rheem.com (website).

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