Fieldpiece Instruments ACM3 Carbon Monoxide Accessory Head and ACMP3 Spot-testing pump make up the ACMK3 kit. The three-pin catalytic sensor provides dependable readings with a range of 0-1,000ppm - 2,000ppm for five minutes max exposure time. It works fast enough for walkthrough testing and is easy to use. There's no mechanism that'll wear out. Can be used as a standalone product, with a datalogger, on a Fieldpiece stickmeter, or with other DMMs. Low cost at $195 trade price! Visit www.fieldpiece.com or call 714/ 257-9060. Fieldpiece Instruments

The TestoKool 523, digital refrigeration system analyzer measures pressures and temperatures, and calculates superheat/subcooling for up to 38 refrigerants on all AC/R and heat-pump systems. It also monitors and controls refrigerant with the integral, two-way manifold and sightglass plus. The TestoKool 523 records 1,000 tests, and produces professional reports. The kit includes an integral boot and stainless steel hanger. For more information, visit www.testo.com. —Testo, Inc.

HVACwebconnection.com is a new on-line HVAC information site catering to the online needs of industry professionals. Find exactly what you're looking for with out having to sift thorough pages of irrelevant search results. A comprehensive directory empowers industry professionals to find anything they need for their HVAC business from products, software, associations, engineering services, and marketing services to training schools. Includes industry news, new products, and a calendar of events. 508/743-027; www.hvacwebconnection.com HVAC webconnection.com

A ThyCurb Vibro-Curb combines adjustable spring isolators and a roof curb into a single unit. Rooftop units can be set immediately after curb installation with roofing completed later without disturbing the unit. Flexible 8-in. flashing permits easy access to adjust isolators. Can be fabricated to match roof pitch. Airtight plenum available. Vibro-Curb ^® can ship in one piece or knocked down. Thybar Corp.is a member of VISCMA. For more information, contact Thybar Corp., 913 S. Kay St., Addison, IL 60101. Phone: 800/666-CURB. Fax: 530/543-5309. Email: johnb@thybar.com. Website: www.thybar.com. —Thybar Corp.

For more than 50 years, Noritz has been the world's #1 manufacturer of tankless technology. Noritz has the only true commercial tankless water heater. Noritz commercial tankless water heaters are the only tankless water heaters accreditated by ASME, with the National Board, and certified in accordance with the H, HLW, and NB stamps, a first in the tankless water heater category. All Noritz tankless water heaters are certified by NSF for commercial applications. Noritz has everything needed for most hot water applications, including a full line of commercial and residential tankless heaters (with the industry's highest capacity model), and a complete line of stainless steel venting and service valves. www.noritz.com/cbiz Noritz America Corporation

This premium tube cutter from Ritchie Engineering will cut copper, aluminum, and mild steel tubing. An enclosed, precision feed mechanism provides for easy, smooth cutting. Wide rollers with flare cut-off groove allow user to remove damaged flares quickly. Wheel retracts into cutter body to save 1-in. in cutting radius. A new, textured finish is easier to grip and hold with oily hands. Cutter is pinned rather than screwed into position, so it rotates in either direction without the screw backing out. Small (#60101 for ¹ /8-in to 1- ¹ /8-in. O.D.) and large (#60102, for up to 1- ⁵ /8-in. O.D.) sizes are available. Visit www.yellowjacket.com/cb or call 800/769-8370. — Ritchie Engineering, YELLOW JACKET ^® Products Division