# Humber Bay Shores 320-Unit Tower Hydronic Riser Flush | Condo HVAC Repair Toronto URL: https://condohvacrepairtoronto.ca/projects/humber-bay-shores-320-unit-riser-flush/ Last-Modified: 2026-10-09 Author: The Condo HVAC Repair Toronto Crew Vertical Hydronic Riser Service | Humber Bay Shores # Humber Bay Shores 320-Unit Tower Hydronic Riser Flush A documented project record from Condo HVAC Repair Toronto [/ →](/) . A 2008 Humber Bay Shores lakefront tower was quoted $800K+ for riser replacement by two prior consultants. Our chemistry-based diagnostic showed heavy mineral scale but zero corrosion. A 10-day chemical descaling restored loop pressure for $42,800 and extended riser life 15+ years. By The Condo HVAC Repair Toronto Crew $42,800 CAD 2 weeks (3 days diagnostic + 10-day flush + 2 days pump replacement) 320 suites ![Chemical descaling cart connected to the Humber Bay building loop](/images/misc/two-technicians-connecting-a-chemical-flush-cart-t.webp) Project Record ## Project Attributes Scope 10-day chemical flush of 18 vertical risers plus 2 Grundfos primary circulator pump replacements Price $42,800 CAD Payment 25% diagnostic approval, 50% flush completion, 25% at sign-off Lead time 3 weeks from signed contract On site 2 weeks (3 days diagnostic + 10-day flush + 2 days pump replacement) Client Property manager + condo corporation (2008 tower) Crew Elena Vargas (Ops Mgr) + 3 flush technicians + chemistry lab Equipment Original 18-stack vertical hydronic risers + Grundfos primary circulators Neighbourhood Humber Bay Shores Building 320 suites, 2008 construction ## The Challenge A 2008 Humber Bay Shores lakefront tower with 320 units served by 18 vertical hydronic risers was showing advanced scale buildup. The loop ran 20 psi below design pressure and primary pumps were working at 70 percent of nameplate to compensate. Two prior consultants quoted riser replacement at $800K+. The condo corporation wanted a chemistry-based second opinion before committing to that capital expense. ### Results - Water hardness dropped from 420 ppm to 85 ppm (90% reduction). - TDS dropped from 1,850 ppm to 420 ppm (77% reduction). - Loop pressure restored to design within 24 hours of pump commissioning. - $42,800 total vs $800K+ replacement quote = 95% capital preservation. - Riser service life extended 15+ years with annual chemistry monitoring program. ## How We Ran It 1. 1 ### Three-day chemistry diagnostic Loop water sampled at 6 points for TDS, pH, chloride, iron and hardness. Visual riser inspection at 4 access ports spanning the full height. Primary pump amp draw measured against nameplate. 2. 2 ### Diagnosis: scale, not corrosion Water hardness 420 ppm, TDS 1,850 ppm, zero corrosion products, zero pitting visible. Risers structurally sound. Chemical descaling could restore loop capacity, no replacement required. 3. 3 ### Ten-day inhibited flush Full-building loop flushed over 10 days with inhibited descaler. Two Grundfos primary circulators replaced on condition basis. Pre- and post-flush chemistry documented at all 6 sample points. 4. 4 ### Weekend pressure test and monitoring plan Post-flush pressure test over a Friday-Sunday window with design pressure restored within 24 hours. Written 15-year chemistry monitoring plan delivered for ongoing scale prevention. On Site ## Project Photos Click any photo to enlarge it. > "The scale report Elena delivered showed exactly where the loop was choking. The real win was proving the riser could run another 15 years instead of being replaced." Marcus H., Property manager, Humber Bay Shores Related ## More Condo HVAC Projects Vertical Hydronic Riser Service service [/hydronic-riser-service/ →](/hydronic-riser-service/) Condo HVAC in Etobicoke [/locations/etobicoke/ →](/locations/etobicoke/) ![Two technicians descaling an open McQuay vertical fan coil in a Yorkville condo suite](/images/misc/two-hvac-technicians-in-navy-workwear-descaling-an.webp) Yorkville ### Yorkville 42-Unit Tower Annual Fan Coil Service Program $38,500 CAD Scope 42 coil descales + 4 pumps + 11 valves On site 3 service nights across 2 weeks Crew Marcus Chen (Ops Mgr) + 4 technicians Equipment McQuay vertical fan coils, 2001 vintage Neighbourhood Yorkville View full project record [Yorkville 42-Unit Tower →](/projects/yorkville-42-unit-annual-service/) ![Crew setting a new vertical fan coil cabinet in a Mimico lakefront condo suite](/images/misc/hvac-crew-of-three-setting-a-new-vertical-fan-coil.webp) Mimico ### Mimico 180-Unit Lakefront Building-Wide Fan Coil Replacement $186,000 CAD Scope Rolling fan coil replacement On site 14-week rolling install Crew Elena Vargas (Ops Mgr) + 2 crews Equipment Replacement vertical fan coils with ECM motors Neighbourhood Mimico View full project record [Mimico 180-Unit Lakefront →](/projects/mimico-180-unit-fan-coil-replacement/) ![Technicians sliding a Trane water-source heat pump chassis out of a condo closet in Markham](/images/misc/two-technicians-sliding-a-trane-water-source-heat-.webp) Downtown Markham ### Downtown Markham 24-Unit Mid-Rise Water-Source Heat Pump Repair $14,200 CAD Scope Reversing valves + contactors On site 6 days over one season Crew James Kowalski (Ops Mgr) + 2 technicians Equipment Trane Axiom water-loop heat pumps Neighbourhood Downtown Markham View full project record [Downtown Markham 24-Unit Mid-Rise →](/projects/downtown-markham-24-unit-heat-pump-repair/) ![](/images/misc/operations-manager-presenting-a-written-hvac-scope.webp) 24-Hour Condo Emergency Dispatch ## Planning Work Like This in Your Building? Start with a free walk-through and readings in sample suites. Your board gets a written scope, per-unit pricing and a schedule before anyone commits. Book a $185 Diagnostic [/contact/ →](/contact/) Call (437) 523-7002 [tel:+14375237002 →](tel:+14375237002) - \* Written scope before work - \* TSSA + Enbridge Red Tag + ESA + WSIB - \* Written workmanship warranty