The hydronic unit heaters, HUH Series, are heat exchanger unit heaters designed for rugged industrial applications in steam, hot water, glycol, or other fluid-circulating heating systems. According to the company, the unit heaters can withstand pressures up to 400 psi and temperatures up to 500 degrees F. The company says the units are designed in single-pass and multipass core configurations, with multipass units greatly improving performance characteristics when used with liquids. HUH heaters are interchangeable with other brands of heaters, the manufacturer states. The heaters have an 18-month warranty.

Hazloc Heaters, #10, 666 Goddard Ave. N.E., Calgary, AB T2K 5X3 Canada; 403-730-2488 or 866-701-4328; 403-730-2482 (fax);

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