NTI TRX Series II Condensing Boiler – Heat Only or Combi
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The NTI TRX Series II is a wall-hung condensing boiler from NTI, a Canadian manufacturer, available as a heat-only boiler or a combi boiler for heat and on-demand hot water. It is the boiler we install most often in Toronto and the GTA, and every price includes standard installation by our TSSA-certified gas technicians, who specialize in hydronic heating.
- ✓ Standard installation included in every price
- ✓ Up to 96% AFUE (TRX085), 95% or higher on every size
- ✓ Heat-loss sizing, so your boiler matches your home, not your old unit
- ✓ 1-year labour warranty, plus 5-year parts and the manufacturer's heat exchanger warranty
- ✓ Financing available, with no upfront payment options
⭐ Where the TRX Fits
We install three boiler brands. Each one is a good boiler; they differ in price and features:
NTI TRX Series II (this boiler)
Canadian-made and well known. The choice most of our customers make.
Compare installed prices for every brand in our Boiler Replacement Cost Toronto guide.
📏 Choose Your TRX Size
| Model | Type | Best for | Net AHRI output | Hot water (77°F rise) |
|---|---|---|---|---|
| TRX085 | Heat only | Small homes | 69 MBH | Indirect tank |
| TRX120 | Heat only | Small to medium homes | 97 MBH | Indirect tank |
| TRX150 | Heat only | Large homes | 121 MBH | Indirect tank |
| TRX199 | Heat only | Very large homes | 160 MBH | Indirect tank |
| TRX110C | Combi | Medium homes | 85 MBH | 2.7 GPM |
| TRX150C | Combi | Large homes | 97 MBH | 3.5 GPM |
| TRX199C | Combi | Very large homes | 160 MBH | 4.8 GPM |
Home size is a guide only. We confirm the right model with a heat-loss calculation before installation.
💡 Heat only or combi? Choose a combi (TRX110C, 150C, 199C) if you want heat and hot water from one unit and have 1 to 2 bathrooms. Choose heat only with an NTI Trin & Stor indirect tank for larger homes, more bathrooms or big tubs. See Combi Boiler Installation Toronto.
🔥 Key Features
- ✓ XTRATECH® stainless steel heat exchanger with large-diameter tubing
- ✓ Modulation up to 11:1 for steady temperatures, less cycling and quiet operation
- ✓ Integrated ECM pump and hot water diverter valve on every model, for a cleaner installation
- ✓ NTI net Wi-Fi for remote monitoring, alerts and service diagnostics
- ✓ Cascade up to 8 boilers for larger homes and buildings
- ✓ Flexible venting: 2" PVC up to 100 ft or 3" up to 150 ft
- ✓ Natural gas or propane
- ✓ Works with radiators, baseboard, radiant floors and hydronic air handlers
📸 Our NTI Boiler Installations
🔧 What Standard Installation Includes
- ✓ Delivery of your new TRX boiler
- ✓ Removal of your old boiler
- ✓ Wall mounting and connection to your existing heating system
- ✓ Gas, venting and condensate drain connections
- ✓ Domestic water connections (combi models)
- ✓ Startup, commissioning and controls setup
- ✓ 1-year labour warranty and warranty registration
A high-efficiency to high-efficiency replacement typically needs no extras. Added accessories (pumps, feeder valve, backflow preventer, air or dirt separator), new venting over 20 ft, extra plumbing or difficult access are quoted separately. See what can add to the cost.
This boiler is sold with installation only. Please contact us before checkout so we can confirm the right size and any extras for your home.
📋 Technical Specifications
| Model | TRX085 | TRX120 | TRX150 | TRX199 | TRX110C | TRX150C | TRX199C |
|---|---|---|---|---|---|---|---|
| Input (BTU/h) | 9,400–85,000 | 13,200–120,000 | 15,000–150,000 | 19,700–197,000* | 11,200–106,000 | 13,200–120,000 | 19,700–197,000* |
| DHW input (BTU/h) | – | – | – | – | 11,200–114,000 | 13,200–150,000 | 19,700–197,000* |
| AFUE | 96% | 95% | 95% | 95% | 95.5% | 95% | 95% |
| Heating capacity (MBH) | 79 | 111 | 139 | 184 | 98 | 111 | 184 |
| Net AHRI (MBH) | 69 | 97 | 121 | 160 | 85 | 97 | 160 |
| Hot water (77°F rise) | – | – | – | – | 2.7 GPM | 3.5 GPM | 4.8 GPM |
| Gas connection | ¾" NPT | ¾" NPT | ¾" NPT | ¾" NPT | ¾" NPT | ¾" NPT | ¾" NPT |
*Natural gas. Propane: 19,200–192,000 BTU/h. All models: indoor, wall-hung, fully condensing, Category IV sealed combustion; 120 V, 60 Hz, less than 12 A.
Documents: TRX Series Brochure (PDF) · NTI Product Catalogue (PDF)
🛡️ Warranty
- ✓ Heat exchanger: manufacturer's warranty
- ✓ Parts: 5 years
- ✓ Labour: 1 year from Bison Air
🏆 Why Buy Your TRX from Bison Air
- ✓ TSSA Certified HVAC Contractor
- ✓ Fully Licensed & Insured HVAC Technicians
- ✓ NTI is our most-installed boiler brand
- ✓ Hydronic specialists: boilers, radiant, snow melt and air handlers
- ✓ Clean, organized copper and PEX installations
- ✓ 1-year labour warranty on every installation
🔗 Related
- ✓ Boiler Installation Toronto
- ✓ Combi Boiler Installation
- ✓ Boiler Replacement Cost
- ✓ All Boilers & Combi Boilers
- ✓ NTI Trin & Stor Indirect Tank
- ✓ NTI FTVN Series II Boiler
- ✓ Hydronic Air Handlers
- ✓ HVAC Financing
📍 Areas We Serve
NTI TRX boiler installation 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
🔥 Get Your NTI TRX Quote
Tell us about your home and current boiler. We will confirm the right TRX size and give you a clear written price.
or fill out our form for a free consultation · Serving Toronto & the GTA
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