COMMERCIAL · HYDRONICS
Caspian runs full commercial boiler plant service across the GTA — multi-unit residential buildings on common boilers, mid-century office towers still running their original cast-iron plant, large-scale radiant heating in warehouses and lobbies, and snowmelt systems for loading bays, ramps, and tenant entries. We specialize in condensing boiler retrofits that replace tired old cast-iron plant with high-efficiency modulating boilers (95%+ AFUE) tied into the existing distribution — typically cutting fuel bills 25-40% with minimal downtime. TSSA-licensed gas fitters certified for high-pressure boiler work.
From a same-week plant audit on a 1960s office tower to a full condensing retrofit feeding a multi-unit residential building, Caspian handles every layer of the hydronic stack — boiler, near-boiler piping, pumps, controls, chemistry, and the distribution that lives in the walls.
Annual service, combustion tuning, and full condensing retrofits for commercial plant rooms. Cast-iron-to-condensing changeovers that keep the existing distribution and cut fuel use 25-40%.
Mid-rise and high-rise residential plants serving 20–200+ units. Common boilers feeding cast-iron rads, fan coils, or in-suite baseboard. We service, retrofit, and replace without taking the building offline.
Steel and copper distribution, valve rebuilds, radiator replacements, balancing, and air-bound loop diagnostics across commercial buildings of any vintage.
PEX-in-slab radiant for warehouse floors, commercial lobbies, showrooms, and amenity spaces. Designed for the load, manifolded properly, and tied into the central plant or a dedicated boiler.
PEX loops with dedicated heat exchangers and glycol loops for loading bays, parking ramps, building entries, and pedestrian walkways. Snow and salt out, liability and shovelling gone.
Annual glycol testing, top-up, and full replacement when concentration drifts. Inhibitor chemistry, pH balancing, and sludge flushes to keep the plant water clean and the heat exchangers efficient.
If you own or manage a Toronto building from before 1980, odds are very high it runs on hydronic heat. The good news: these plants are still serviceable. The better news: a retrofit is usually cheaper than you think.
A huge share of Toronto's pre-1980 office stock and multi-unit residential still runs on hydronic heat — cast-iron sectional boilers, steel piping, cast-iron radiators throughout the suites and corridors. The architects of that era specified hydronics for a reason: it's quiet, it's durable, and for dense urban buildings it just works.
These systems can run for 50+ years if maintained — and many in the GTA are now pushing 60+ years on the original plant. The radiators and most of the piping will outlast the building. The boilers and pumps eventually won't. The question isn't whether they need attention; it's when, and at what scope.
Replacement isn't always the answer. Often a condensing boiler retrofit (95%+ AFUE) tied into the existing distribution can cut fuel bills 25-40% with minimal disruption — the rads stay, the piping stays, and a modulating boiler with proper outdoor reset controls does the work the old atmospheric plant used to do badly.
We also handle the unglamorous side of plant care: glycol top-up and chemistry balancing, expansion tank service, circulator pump replacement, sensor and aquastat work, and the controls and BAS integration that keep the plant running predictably through a Toronto winter.
The complaints we hear from property managers and building owners are remarkably consistent. Most of them are fixable without ripping the plant out — if you know what's actually causing them.
Almost always a circulation problem — failed pump, air-bound loop, stuck zone valve, or sludge restricting flow through the heat exchanger. Heat is being made; it just isn't getting where it needs to go.
Some suites are tropical, others can't get above 18°C. Usually a balancing issue — and almost always correctable without major work. Balancing valves, proper differential pressure setup, and a real hydronic balance report fix most of it.
Year-over-year creep on the gas bill with the same occupancy and same weather means efficiency loss in the old boiler — fouled heat exchanger, combustion drift, or short-cycling controls. Often a tune saves 5–10%; a retrofit saves much more.
After 40+ years, packing dries out, gaskets harden, and pump seals fail. Individually they're small jobs; together they signal a plant that needs a maintenance plan instead of a series of emergencies.
GET A QUOTE
Tell us what you've got — building type, plant age, what's complaining and what's leaking — and we'll come out, walk the plant room, and put together a clear scope. Plant audit included with every quote; no obligation, no upsell.