At the 2022 AHR Expo in Las Vegas, Mikrofill Systems Ltd, Redditch, United Kingdom, introduced its Mikrofill 3 hydronic system pressurization unit for the North American HVAC market. The direct-type pressurization unit is available for sealed, low-pressure hot water and chilled water commercial and multifamily residential applications.
Able to fill any heating or chilled water system from empty without the use of a pump, the product delivers commercial backflow protection with no RPZ valves, while providing electronic pressure management. It connects directly to the commercial building’s incoming water supply (main or boosted). Pre-commissioned sensors monitor system inlet and operating pressure which automatically maintain system pre-sets. When a change in cold-fill water pressure is detected, the sensors open the Mikrofill 3 valves to top off the system. It also provides leak and fl od protection. It has a fill rate of 3.8 gallons per minute, based on an incoming pressure of 30 psi. The base requirement is a water-supply pressure of 4.5 psi greater than the cold-fill requirement.