How a Toronto condominium cut chiller energy use by 31% — without replacing a single system.
Applewood Landmark, 1300 Bloor St. Two aging chillers running below their potential. No one had ever measured exactly why.
About
Industry: Multi-Residential
Location: Toronto, ON
Sytems: Chilled Water System • Chillers • Cooling Towers
Our system is an engineer’s dream.
– James Cryer, Production Engineering Manager,
Hitachi Astemo UK
The Problem
The building’s two Trane chillers were running well below their designed efficiency — but nothing was measuring where the losses were actually happening.
The Approach
Renteknik instrumented the entire chilled water system — temperature, pressure and power, on both chillers, their pumps and their fans — to find every point of loss. Deviations from manufacturer spec pointed to specific fixes: resetting chilled water and condenser temperatures, correcting flow issues, cleaning a fouled condenser. Where it made sense, we went further — variable frequency drives, cooling tower refurbishment, a full chiller overhaul.
The Results
Measured, verified savings — not modeled ones. The monitoring stayed in place after the project ended, so the building can see the moment performance starts to drift again.
Energy Savings
Electricity Demand Savings
450-ton chillers optimized
01
Efficiency you can measure, not estimate
Once every chiller, pump and fan was instrumented, the losses stopped being invisible.
- Constant chilled water temperatures replaced with a reset strategy
- Condenser losses identified and corrected
- Cooling tower and chiller overhaul added lasting capacity
- Monitoring stayed in place to protect the gains
The system that found the savings is still running — watching for drift, not waiting for the next audit.
Not a one-time fix. A standing baseline.