October 29, 2025
Building owners and operators are facing a growing need to cut energy use and lower carbon emissions — Danfoss solutions can help. In cities like Chicago, large buildings over 250,000 square feet must meet benchmarking requirements that set deadlines for measurable reductions in consumption. For facility owners, this means finding ways to improve efficiency without…
September 30, 2025
In an ideal world, a hydronic system operates quietly in the background, heating and cooling a building without drawing attention to itself. But in reality, noise and vibration are two of the most common and frustrating issues facility managers and mechanical contractors face. From the sudden jolt of water hammer to the low hum of…
September 19, 2025
When a commercial HVAC system relies on glycol to prevent freezing, a reliable method is needed to maintain system pressure. That’s where Armstrong’s GLA Units come in. These automatic fill units are designed to maintain proper pressure in glycol-based systems while preventing contamination, overflow, or system failure. At Maddock, we stock Armstrong GLA units—ready to…
July 28, 2025
Garlock’s LINK-SEAL modular seals (models LS-200 through LS-650) are widely used to create permanent, hydrostatic seals around pipes and conduits where they pass through walls, floors, and other barriers. These modular seals, made from interlocking rubber links compressed by bolts, provide a gas- and water-tight seal that withstands up to 20 psi of water pressure,…
July 14, 2025
When selecting a Garlock LINK-SEAL, two main factors influence performance and longevity: choosing the right model based on the pipe-to-wall gap and selecting the right material for the environment. Garlock offers LINK-SEALs in sizes from LS-200 to LS-600 and beyond, each suited to different pipe sizes and conditions. Note: If your size or configuration isn’t…
May 27, 2025
Maddock is excited to announce the addition of the KN Series boilers from Mestek Boiler Group to our commercial heating lineup. As the only American-made, cast-iron condensing boilers on the market, the KN Series blends traditional strength with modern performance. This makes the KN Series ideal for retrofits, replacements and new construction alike. A Return…
April 29, 2025
Proper venting is essential for any boiler system’s safe, efficient and code-compliant operation. That’s why we’re proud to now offer the complete line of venting solutions from US Draft Co.—a leader in engineered draft control products. These advanced systems are designed to optimize draft performance, protect equipment, and support a wide range of heating appliances…
April 21, 2025
For decades, Titan Flow Control has been a trusted name in industrial flow control solutions, providing high-quality strainers, check valves, and other pipeline accessories. Known for its durability, precision and customer-driven engineering, Titan has steadily built a reputation for excellence. But where did its journey begin, and how did it evolve into the globally recognized…
April 16, 2025
For over a century, Sussman Electric Boilers has been at the forefront of steam technology, evolving from a manufacturer of industrial irons to a leader in electric steam and hot water boilers. From the textile factories of early 20th-century New York to cutting-edge sterilization, humidification and decarbonization solutions today, Sussman has remained committed to innovation…
February 19, 2025
Understanding the differences between primary-variable and primary-secondary boiler designs can mean having an efficient, long-lasting hydronics system and one that can be prone to boiler and heat exchanger inefficiency, leaks, damage, and other operational challenges. Primary-Secondary Boiler Systems: A Focus on the Boiler These systems are typically chosen when flow rates vary and typically include…
