Designing With High-Efficiency Gas-Fired Boilers is a free, 24-page reference guide that illustrates how the manufacturer's gas-fired boilers can enhance fuel efficiency and lower project costs of five hydronic heating designs: traditional loops, high ΔT designs, two-pipe systems, combination domestic hot water and space heat, and water-source heat pump systems. A facility case study accompanies each system discussion.

AERCO International, 159 Paris Ave., Northvale, NJ 07647; 800-526-0288 or 201-768-2400, ext. 242; 201-768-7789 (fax); info@aerco.com; www.aerco.com/gfa

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