Saskatoon Tower

Energy Management

In 2004, the owners of Saskatoon Tower decided it was time to upgrade their mid-efficient hot water boiler system to something that was more energy efficiency, more environmentally friendly, with aim of lowering their overall operating cost.

Service completion: 2005
Scope of services: Auditing, Ongoing Monitoring of Energy Use, Federal and Provincial Grant Application
Size: 16 storeys plus parkade
Building systems: Hot water fan-coils and hot water convector baseboard heaters, dedicated domestic hot water boiler.

The existing system consisted of two copper fin tube boilers that were heating convector baseboard, fan coils and one copper fin tube boiler that was strictly dedicated to domestic hot water.

The heating system was replaced with a Viessman hybrid system, where the condensing Vertomat VSB-57 with a fully modulating Wieshaupt gas burner was designed to take care of the heating load until it got below -25 degC (at this point most boilers do not condense), and the Rondomat RMT-630 with a fully modulating Riello gas burner was to assist with the heating load at very cold temperatures. A mixing valve to maintain building setpoint while generating domestic hot water and a heat exchanger for make-up air was added to the heating system.

Thurston Engineering Services found that Saskatoon Towers decreased their gas consumption by 44% in only 4 months. This project allowed the owners to obtain their goals of higher energy efficiency and lower operating costs. They were also able to take full advantage of the SaskEnergy Commercial Boiler grant program.

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