Oberlin Filter

For over 55 years, Oberlin Filter Company has focused on building filtration systems designed to perform long-term. Some Oberlin filters have operated continuously for more than 40 years. Timeline: May 2015 to November 2015. H&H Mechanical completed a new construction HVAC installation in Waukesha, including rooftop units, hot water VAV reheat, high-efficiency boilers, infrared heaters, and in-floor hydronic heating throughout the shop areas.

Scope of Work

H&H Mechanical Contractors provided and installed:

H&H Mechanical provided and installed:

• 5 Carrier VAV RTUs for office and production areas, with associated supply and return ductwork
• 5 RTU roof curbs
• All necessary natural gas piping serving the RTUs
• 1 high-efficiency boiler serving hot water reheat coils for the VAV system
• 26 hot water VAV boxes in the office area for zoning
• Carrier BACnet i-Vu control system for HVAC controls throughout office and production
• All associated ductwork and controls for the VAV system
• 4 gas-fired infrared heaters
• 3 Lochinvar Knight high-efficiency gas-fired boilers
• 75,000 feet of 5/8" PEX for in-floor hydronic heating in the shop, including associated piping, circulation pumps, expansion tank, air separator, fill valve, and manifolds
• 1 ductless split system serving the office IT room

Results

This project delivered a full HVAC new construction installation made up of multiple rooftop units, a hot water VAV reheat system, high-efficiency boiler systems, and in-floor hydronic heating throughout shop areas.

The RTUs were installed, ducted, and commissioned to provide primary ventilation and cooling. Supply, return, and outside airflows were set and verified to match engineered design CFM requirements.

Hot water VAV terminal units with reheat coils were installed to provide zone-level temperature control. Boiler systems were installed with key hydronic components (including circulation pumps, expansion tanks, air separators, safety relief devices, and temperature/pressure controls) to support both VAV reheat and the shop radiant floor heating loads.

The in-floor hydronic heating system included insulated and pressure-tested PEX tubing embedded in the shop slab, with zoned manifolds and balancing valves to support even heat distribution. Hydronic piping systems were flushed, purged, pressure tested, and balanced.

Control sequences were programmed and verified to coordinate RTU operation, VAV modulation, boiler staging, and hydronic in-floor heating. Final startup and functional performance testing confirmed proper system integration and reliable heating and cooling performance throughout the facility.