Thrivent Financial Bank
Project Scope: When Entering into this large building, you enter into a large multi-story open atrium with an Escalator up to the 2nd floor, to the bank-floor.
Problem: There was extreme difficulty in heating the individual open-air (no ceilings) office spaces because of the open-air atrium, where heat would rise and disperse, so we adopted a system that would give individually adjustable heat to the near-by immediate-area of the office worker (we didn’t try to heat a large area and we saved energy).
Solution: The Contractor installed Rehau, Inc. ‘Raupanel’ hydronic heating panels for the office walls, which horizontally directed radiant-heat to the workers desk area. Each individual office and the receptionist area are zoned separately with 16 thermostats (zones) total.
Heat Source: The hydronic heating piping (and fluid) is tapped into the existing building heating system piping. Hot water is pumped by a Wilo, USA model # Star 5 FX pump into a Rehau, Inc. heat-exchanger hot side . After the system expansion-tank, the water is pumped by a Wilo, USA model # Stratos 1.25 X 3-20 variable speed, ECM motor pump to the 2 Rehau, Inc. 8-zone Probalance Manifolds, with 16 zone-vales total The pump increases or decreases its flow from the heat exchanger hot-side as zone valves open and close, as heating requirements vary. The water temperature is adjusted with a globe-valve to achieve 90-110 degree system water temperature.
Result: Individually controlled heating is achieved for each office worker and much energy is saved by using Rehau, Inc. radiant heating where it is needed, along with Wilo, USA ECM-motor variable-speed pumps.
Project: Individually controlled heating for each office worker using Rehau radiant heating.
Contractor: Cities Plumbing and Heating Engineer: Harold Bruner