Heating
Boiler & Navien Combi-System Installation in Trenton & Quinte West
Hydronic heating delivers some of the most comfortable, even warmth available — and Johnston Mechanical HVAC LTD installs and services boilers and Navien combi-systems across Trenton, Quinte West, Belleville, Brighton, and surrounding Hastings County communities. Brandon Johnston is a TSSA certified gas technician (FS-R-52252) who personally oversees every installation.
Boilers heat water and distribute it through radiators, baseboard convectors, or in-floor radiant loops. Unlike forced-air systems, there is no ductwork to leak and no dry air blowing through the house. Many homeowners in Trenton and Quinte West who switch to hydronic heating report noticeably more consistent comfort — especially in older homes with high ceilings or open floor plans.
Johnston Mechanical installs Navien condensing boilers and combi-systems. Navien units are wall-hung, compact, and highly efficient — with AFUE ratings up to 95%. A Navien combi-system handles both space heating and domestic hot water from a single unit, eliminating the need for a separate hot water tank and freeing up mechanical room space.
For homes with existing hydronic systems, Brandon assesses the condition of the distribution piping, radiators, and controls before recommending a replacement boiler. In many cases, the existing distribution system can be reused, keeping installation costs down. Where upgrades are needed — zone valves, thermostats, expansion tanks — Brandon will identify them upfront in a written quote.
New hydronic installations in Trenton, Belleville, Brighton, and surrounding areas are designed to match the home's heat load. Brandon uses proper heat-loss calculations to size the boiler correctly — an oversized boiler short-cycles, wears out faster, and costs more to operate. Getting the sizing right from the start is one of the most important things a qualified installer can do.
Radiant floor heating is one of the most popular applications for a new boiler installation. Warm floors eliminate cold spots, work silently, and pair well with high-efficiency boilers. Johnston Mechanical can design and install radiant systems for new construction in Quinte West and retrofit applications in existing homes throughout the service area.
Johnston Mechanical serves Trenton, Quinte West, Belleville, Brighton, Frankford, Stirling, Campbellford, and surrounding Hastings County and Prince Edward County communities for boiler and Navien combi-system installation.
What's Included
- Site visit and written quote
- Heat-loss calculation and proper boiler sizing
- Navien boiler or combi-system supply and installation
- Gas line connection and pressure test
- Hydronic piping, zone valves, and controls
- Domestic hot water integration (combi-systems)
- System fill, bleed, and commissioning
- Thermostat and zone control setup
- 5-year labour warranty (10-year upgrade available)
- TSSA certification documentation
How a Job Goes
- 1
Site Assessment
Brandon visits your home in Trenton, Quinte West, Belleville, or Brighton to assess the existing system, measure the space, and confirm the scope of work.
- 2
Written Quote
You receive a detailed written quote after the site visit — no ballpark estimates over the phone. The quote covers equipment, labour, and any distribution upgrades identified during the assessment.
- 3
Scheduling
Once you approve the quote, Brandon schedules the installation at a time that works for you. Most boiler replacements are completed in one to two days.
- 4
Installation
Brandon handles the full installation — boiler mounting, gas connection, hydronic piping, controls, and venting. No subcontractors. No handoffs mid-job.
- 5
Commissioning & Walkthrough
Every installation finishes with a full system commissioning — pressure test, combustion analysis, zone checks — and a walkthrough so you understand your new equipment.
Service Area
Johnston Mechanical serves Trenton, Quinte West, Belleville, Brighton, Frankford, Stirling, and Campbellford for boiler and Navien combi-system installation. If you are in Hastings County or Prince Edward County and are not sure whether we cover your area, call (613) 827-8973 and Brandon will give you a straight answer.
Warranty
All boiler and combi-system installations by Johnston Mechanical include a 5-year labour warranty. A 10-year labour warranty upgrade is available. Navien equipment carries its own manufacturer warranty — Brandon will walk you through coverage details at the time of installation.
Frequently Asked Questions
How long does a boiler installation take in Trenton?
Most residential boiler replacements in Trenton and Quinte West are completed in one to two days. New installations in homes without existing hydronic systems take longer depending on the scope of piping required. Brandon will give you a realistic timeline during the site visit.
What is a Navien combi-system?
A Navien combi-system is a single wall-hung unit that provides both space heating through a hydronic distribution system and on-demand domestic hot water. It eliminates the need for a separate hot water tank, saving space and improving efficiency.
Can a boiler be used with radiant floor heating?
Yes. Boilers are the preferred heat source for radiant floor heating systems. Johnston Mechanical can design and install a hydronic system with radiant loops for new construction or retrofit applications in Trenton, Belleville, Brighton, and surrounding areas.
Get a Written Quote — No Obligation
Pricing is provided after a site visit. No made-up numbers over the phone — just an honest assessment from a TSSA certified technician.