Commercial boiler installation in Toronto and the GTA for multiplexes, apartment buildings, offices, plazas and mixed-use buildings. We design and install high-efficiency condensing boilers, single or in multi-boiler cascades, with the piping, pumps, venting, gas and controls to run them, then start up and commission the whole system.
- ✓ TSSA-certified gas technicians, who specialize in hydronic heating
- ✓ NTI, Navien and Viessmann condensing boilers
- ✓ Sized from a heat-loss calculation for the whole building
- ✓ Multi-boiler cascade design, piping and controls
- ✓ 1-year labour warranty on every installation
Recent Project: Three-Boiler Cascade
NTI TFTN Three-Boiler Cascade
Commercial building · Toronto
Three NTI TFTN condensing boilers installed as one cascade system for a commercial building. The boilers share the heating load and stage on and off as demand changes.
What we installed:
- ✓ Three NTI TFTN wall-hung condensing boilers
- ✓ Cascade piping and controls
- ✓ Startup and commissioning
⚙️ Why a Multi-Boiler Cascade?
Instead of one large boiler, a cascade uses two or more smaller condensing boilers controlled as one system. For most multiplexes and small commercial buildings it is the better design:
- ✓ Backup built in: if one boiler needs service, the others keep the building warm
- ✓ Better efficiency at part load: on mild days only one boiler runs instead of one big boiler cycling
- ✓ Fits tighter mechanical rooms: wall-hung boilers instead of one large floor-standing unit
- ✓ Room to grow: add a boiler later if the building load increases
| Single large boiler | Multi-boiler cascade | |
|---|---|---|
| Backup if a boiler is down | No | Yes, the other boilers keep running |
| Mild-day operation | One large boiler at low fire or cycling | One small boiler runs at its best range |
| Mechanical room space | Large floor-standing unit | Wall-hung units side by side |
| Future expansion | Replace the boiler | Add another boiler |
Commercial Boilers We Install
NTI TFTN Series
Wall-hung condensing boilers up to TFTN399 (399,000 BTU/h), cascade up to 8 boilers. Floor-mount TFTN models from 500 to 850 MBH for larger projects.
Navien NFB Commercial
NFB-301C and NFB-399C fire-tube condensing boilers, 97.5% thermal efficiency, up to 15:1 turndown, Ready-Link cascade up to 8 units.
NTI TRX & FTVN Series II
For multiplexes and smaller buildings: residential-size boilers that can cascade up to 8 units.
See every model in our Boilers & Combi Boilers collection.
Buildings We Heat
- ✓ Multiplexes and apartment buildings
- ✓ Condominiums
- ✓ Office buildings
- ✓ Commercial plazas
- ✓ Mixed-use buildings
- ✓ Medical clinics
- ✓ Schools
- ✓ Hotels
What a Commercial Boiler Can Supply
- ✓ Radiant floor heating
- ✓ Hydronic air handlers for forced-air heat
- ✓ Baseboard and radiator heating
- ✓ Snow melt for ramps, walkways and entrances
- ✓ Domestic hot water through indirect tanks
🔄 Commercial Boiler Replacement
Many commercial boilers run for 20 years or more, but old atmospheric boilers waste gas and break down more often. Common reasons to replace:
- ✓ Rising gas bills
- ✓ Frequent repairs
- ✓ Uneven heat between units or floors
- ✓ Boiler near the end of its life
Replacing one old boiler with a cascade of modern condensing boilers usually cuts gas use and adds the backup the old system never had.
📐 How We Handle a Commercial Boiler Project
1. Site visit and heat loss
We review the building, the existing system and the drawings, and calculate the heating load.
2. System design
Boiler selection, cascade layout, piping, pumps and mechanical room layout.
3. Written quote
A clear scope and price, scheduled around your tenants or construction schedule.
4. Installation
Boilers mounted, piped, vented and connected to gas.
5. Controls
Cascade controls, outdoor reset, zoning and pumps set up.
6. Startup and commissioning
System filled, purged, started and tested, with a walkthrough for your team.
What Affects the Cost
Every commercial boiler job is quoted after a site visit. The main factors are:
- ✓ Building heat load and number of boilers
- ✓ Boiler model and size
- ✓ Piping and pump changes
- ✓ Venting and gas line work
- ✓ Controls and zoning
- ✓ Indirect hot water or snow melt added
For installed price ranges, see our Boiler Replacement Cost Toronto guide.
Why Choose Bison Air for Commercial Boilers
- ✓ TSSA Certified HVAC Contractor
- ✓ Fully Licensed & Insured HVAC Technicians
- ✓ Hydronic specialists: boilers, radiant, snow melt and air handlers
- ✓ Multi-boiler cascade design and controls
- ✓ Clean, organized installations built to be serviced
- ✓ 1-year labour warranty on every installation
Related Services
- ✓ Commercial HVAC Services
- ✓ Commercial HVAC Installation
- ✓ Rooftop Units
- ✓ VRF Systems
- ✓ Multi-Unit Residential HVAC
- ✓ HVAC Contractor for Builders
- ✓ New Construction HVAC
- ✓ Boiler Installation Toronto
- ✓ Combi Boiler Installation
- ✓ Boiler Replacement Cost
- ✓ Radiant Floor Heating
- ✓ Heated Driveway & Snow Melt
- ✓ Hydronic Air Handlers
- ✓ Contact Us
Areas We Serve
Commercial boiler installation and replacement throughout Toronto and the GTA:
Toronto · North York · Scarborough · Etobicoke · Vaughan · Markham · Richmond Hill · Aurora · Newmarket · East Gwillimbury · King City · Stouffville · Mississauga · Brampton · Oakville · Milton · Burlington · Barrie · Innisfil · Orillia · Bradford · Keswick · Ajax · Pickering · Whitby · Oshawa · Orangeville
Planning a Commercial Boiler Project?
Send us your drawings or tell us about the building. We will size the system and give you a written scope and price.
Call 416-652-4323 Send Us Your Drawings
Serving Toronto & the GTA