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24-Hour Commercial Emergency Dispatch(437) 524-2997
North York $38,000

North York Office Tower MUA Full Replacement

A failed 25-year-old make-up air unit replaced over one weekend, with the food court exhaust interlocks and building pressurization rebalanced.

Full replacement of a failed rooftop make-up air unit serving corridors and the ground-floor food court in a Yonge-Sheppard office tower, including crane lift, gas train, controls and airflow balancing.

New make-up air unit being set on a North York office tower roof

The Challenge

What the Building Needed

The tower make-up air unit failed in late fall with a cracked burner section and seized blower bearings. Without it, food court exhaust pulled the lobby negative and doors were hard to open.

Our Approach

How We Did It

  1. 01 Assessed the failed unit and confirmed replacement was cheaper than a burner and blower rebuild on a 25-year-old casing.
  2. 02 Ordered a direct-fired replacement sized to the measured exhaust airflow, not the old nameplate.
  3. 03 Set the new unit by crane on a Saturday and completed gas, electrical and controls on Sunday.
  4. 04 Rebalanced supply against food court exhaust and verified the exhaust interlocks.

Results

Measured Outcomes

  • Building pressurization restored, lobby door issue resolved
  • Replacement completed over one weekend
  • Discharge temperature now trended in the BAS

"The lobby doors were the first thing tenants complained about and the first thing that was fixed. The swap happened over one weekend."

Thomas Adeyemi, Building Manager

Site Photos

On the Job

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  • TSSA G1+G2, ESA, 313A
  • Written findings every visit
  • 90-day / 2-year labour warranty
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