Boiler Installation in Northwest Washington
New Construction · Remodels · Conversions · Upgrades · Hydronic Systems. Licensed boiler specialists installing every type of boiler system in Bellingham, Mount Vernon & Anacortes.
A New Boiler Installed Right Heats Your Home for Decades
A boiler installation is one of the most complex heating projects in residential and commercial construction. It involves positioning a heavy, pressurized vessel, running gas piping and venting, installing supply and return hydronic piping to every heating zone, wiring zone valves and circulator pumps, installing expansion tanks and safety relief valves, pressurizing and bleeding the entire loop, performing combustion analysis, and coordinating permits and inspections. Every connection matters.
LaVergne's handles complete boiler installation including system design and sizing, gas line work, hydronic piping, zone valve and circulator pump installation, expansion tank and safety devices, radiant floor and baseboard hookup, thermostat and control wiring, combustion testing, and permit coordination across Bellingham, Mount Vernon, Anacortes, and surrounding areas.
What to Look for in a Boiler Installer
Boiler installation involves positioning a pressurized vessel, running gas piping with proper venting, installing hydronic supply and return lines to every zone, wiring controls and safety devices, pressurizing and bleeding a closed loop system, and passing code inspection. A bad install creates carbon monoxide hazards, dangerous pressure buildup, leaks, and total system failure. Here's what matters.
Why LaVergne's?
We check every box. Installing boilers since 1951.
- Licensed & Insured (#LAVERPH798NZ)
- 75+ Years of Boiler Installs
- Gas, Combi & Condensing
- Full System Design & Sizing
- 5 Star Customer Reviews
- Permit & Inspection Coordination
Boiler Installation Services
Six installation service areas covering every boiler type, application, and project scenario, handled start to finish by licensed boiler specialists.
Gas Boiler Installation
Unit positioning, gas line sizing and connection, venting installation, hydronic supply and return piping, expansion tank, safety relief valve, circulator pump, zone valve wiring, pressurizing, bleeding, combustion testing, and full heat verification.
Install →Condensing Boiler Install
High efficiency condensing boiler installation with PVC or polypropylene venting, condensate drain routing, outdoor reset control setup, modulating burner configuration, and energy efficiency optimization for maximum fuel savings.
High Efficiency →Combi Boiler Installation
Combination boiler providing both space heating and domestic hot water from one unit. Hydronic loop piping, domestic hot water plumbing, priority valve setup, and thermostat configuration for dual function operation.
Go Combi →New Construction Boiler
Complete boiler system design and installation for new homes. Rough in piping during framing, gas line stub out, zone layout, radiant or baseboard distribution, final unit set, controls, commissioning, and inspection.
New Build →Radiant Floor Systems
Boiler paired with radiant floor heating. PEX tubing layout in slab or joist bays, manifold installation, zone pump setup, mixing valve configuration, thermostat wiring, and system balancing for even floor warmth.
Radiant →Zone Expansion & Remodel
Adding heating zones to existing boiler systems for additions, finished basements, ADUs, and remodels. New zone valve, circulator pump, baseboard or radiant loop, thermostat, and tie in to existing boiler.
Expand →Planning a Boiler Installation?
New construction, remodels, conversions, and upgrades across Bellingham, Mount Vernon, Anacortes and all surrounding areas.
How to Choose the Right Boiler for Your Home
The right boiler depends on your home's size, number of heating zones, distribution type (radiators, baseboard, or radiant floor), domestic hot water needs, fuel source, and efficiency goals. Here are the four main types we install and what each does best.
We evaluate your home, calculate heat loss, size the boiler to your actual demand, and recommend the best type for your situation and budget. No guesswork, no oversizing, no undersizing.
Standard Gas Boiler
Reliable, proven technology. Cast iron or steel heat exchanger, natural draft or power vent, 80 to 85 percent efficiency. Best for straightforward replacements and budget conscious projects.
Learn More →Condensing Boiler
High efficiency, 90 to 98 percent AFUE. Extracts extra heat from exhaust gases. Lower fuel bills, smaller footprint. Best for homeowners prioritizing long term savings.
Learn More →Combi Boiler
Space heating and domestic hot water from one compact unit. No separate water heater needed. Saves space and simplifies the system. Best for smaller homes or limited space.
Learn More →Commercial Boiler
Higher BTU output for larger buildings, multi unit properties, and commercial spaces. Multiple zone capability, building automation compatible, and designed for heavy duty continuous operation.
Learn More →
Why Professional Boiler Installation Matters
A boiler installation combines a pressurized vessel, gas combustion, exhaust venting, a closed loop hydronic piping system, multiple zone controls, circulator pumps, expansion tanks, and safety devices into one integrated project. Every component must be sized, connected, tested, and commissioned correctly. A single mistake creates carbon monoxide exposure, dangerous pressure buildup, flooding, or a system that never heats evenly.
Licensed boiler installers design the entire system as one coordinated package, size the boiler to your actual heat loss, run gas and venting to code, pipe every zone with correct flow rates, wire controls for proper sequencing, pressurize and bleed the loop, perform combustion analysis, and coordinate permits and inspections so your system runs safely and efficiently for decades.
System Design
Sized to your actual heat loss
Full Code
Gas, venting, piping, permits
Commissioned
Tested and balanced every zone
Boiler Installation FAQs
Common boiler installation questions answered by our licensed specialists serving Whatcom and Skagit Counties.
How much does a boiler installation cost?
A new residential boiler installation typically runs $5,000 to $12,000 depending on boiler type, BTU rating, number of zones, distribution method, and piping complexity. High efficiency condensing boilers cost more upfront but save significantly on fuel long term. We provide a detailed written quote.
How long does a boiler installation take?
A standard boiler installation takes 1 to 2 days. New construction installs with full hydronic piping take 3 to 5 days spread across rough in and final phases. Radiant floor systems add additional time for tubing layout. We provide exact timing with your quote.
What size boiler do I need?
Boiler sizing is based on your home's heat loss calculation, not square footage alone. We factor in insulation, window area, ceiling height, climate zone, and number of zones to determine the exact BTU output required. Oversizing wastes fuel. Undersizing leaves you cold.
Do I need a permit for boiler installation?
Yes. Most jurisdictions in Whatcom and Skagit Counties require mechanical and gas permits for boiler installation. We handle all permit applications, fee coordination, and inspection scheduling as part of our standard service.
Can you install a boiler where I've never had one?
Yes. We handle first time boiler installations including full system design, gas line routing, hydronic piping throughout the home, zone layout, distribution selection, controls, and commissioning from scratch.
What is included in a boiler installation?
Every installation includes the boiler unit, gas line connection, venting, hydronic supply and return piping, expansion tank, safety relief valve, circulator pumps, zone valves, thermostat wiring, pressurizing, air bleeding, combustion testing, and permit coordination.
Should I choose condensing or standard?
Condensing boilers operate at 90 to 98 percent efficiency versus 80 to 85 for standard. They cost more upfront but reduce fuel bills by 15 to 30 percent annually. If you plan to stay long term, the payback period is typically 3 to 5 years.
Can you add radiant floor heating?
Yes. We install radiant floor heating systems paired with new or existing boilers. This includes PEX tubing layout, manifold installation, mixing valve setup, zone pump configuration, and thermostat wiring for individual room control.
What areas do you serve?
We install boilers across all of Whatcom and Skagit Counties including Bellingham, Mount Vernon, Anacortes, Burlington, Sedro Woolley, Ferndale, Lynden, and surrounding areas.