Heating Replacement in Northwest Washington
Old System Out · New System In · Every Connection · Every Zone · Fully Tested. Licensed heating specialists replacing aging systems across Bellingham, Mount Vernon & Anacortes.
When Your Heating System Costs More to Keep Than to Replace, It's Time
Every heating system reaches a point where repair no longer makes sense. The furnace heat exchanger cracks. The boiler vessel corrodes. The heat pump compressor fails for the second time. Parts become obsolete. Efficiency drops below what's acceptable. Repair bills stack up every winter. When your heating system crosses that line, replacement isn't just smarter financially — it's safer. A cracked heat exchanger leaks carbon monoxide. A corroded boiler vessel creates pressure hazards. A failing system wastes hundreds in fuel every season.
LaVergne's handles complete heating system replacement including old system disconnection and removal, new system sizing and selection, fuel line work, venting, ductwork or piping reconnection, electrical and thermostat wiring, combustion testing or refrigerant charging, distribution balancing, and permit coordination for furnaces, boilers, heat pumps, and radiant systems across Bellingham, Mount Vernon, Anacortes, and surrounding areas.
What to Look for in a Heating Replacement Specialist
Heating replacement is more than swapping one box for another. The old system must be safely disconnected from fuel, venting, distribution, and electrical. The new system must be properly sized, positioned, connected, vented, wired, tested, and commissioned. And if you're switching system types — furnace to heat pump, boiler to radiant — the complexity multiplies. You need a company that replaces every type and recommends the right one.
Why LaVergne's?
We check every box. Replacing heating systems since 1951.
- Licensed & Insured (#LAVERPH798NZ)
- 75+ Years of Heating Swaps
- Every Heating System Type
- Proper Heat Load Sizing
- 5 Star Customer Reviews
- Permit & Inspection Coordination
Heating Replacement Services
Six replacement service areas covering every heating system type from evaluation to commissioning, handled start to finish by licensed specialists.
Evaluation & Sizing
On site evaluation of your existing system. Heat load calculation, system type recommendation, efficiency comparison, distribution assessment, and detailed written quote with options for like for like or system type change.
Evaluate →Furnace Replacement
Old furnace disconnected, removed, disposed. New furnace sized, positioned, gas connected, vented, ducted, wired, combustion tested, airflow balanced, and heat verified to every room. Same day heat restoration.
Replace →Boiler Replacement
Old boiler disconnected, drained, removed. New boiler sized, positioned, gas or oil connected, vented, piped to existing distribution, circulator and controls configured, pressure tested, and zones verified.
Replace →Heat Pump Replacement
Old indoor and outdoor units removed. New matched system installed with line set, electrical, condensate, thermostat, refrigerant charge, and performance testing. Ducted or ductless configurations.
Replace →System Type Conversion
Switching from furnace to heat pump, boiler to radiant, oil to gas, or any other system type change. Full infrastructure evaluation, new distribution if needed, and complete commissioning of the new system.
Convert →Permits & Commissioning
Mechanical, gas, and plumbing permit applications as required. Combustion analysis or refrigerant verification documentation, airflow or flow measurement, commissioning report, warranty registration, and inspection.
Complete →Ready to Replace Your Heating System?
Complete heating system replacement across Bellingham, Mount Vernon, Anacortes and all surrounding areas.
Signs Your Heating System Needs Replacement
Not every heating problem means replacement. But some signs point clearly to a system that has reached the end of its useful life. Continuing to repair past this point costs more, wastes more fuel, and creates more risk than replacing it. Here are the four clearest signs across all system types.
We evaluate your system honestly and tell you whether repair or replacement makes more sense. If replacement is the answer, we size the new system to your actual heat load and handle every step.
Age Beyond Lifespan
Furnaces last 15 to 20 years. Boilers last 20 to 30. Heat pumps last 12 to 18. Beyond that, efficiency drops, parts become scarce, and safety risk increases sharply. If your system is past its expected life, it's time.
Evaluate →Frequent Repairs
If you're calling for heating repair every winter regardless of system type, the total cost of those repairs is approaching or exceeding replacement cost. A new system ends the cycle and comes with full warranty.
Compare →Safety Failure
Cracked heat exchanger on a furnace, corroded vessel on a boiler, or failed compressor on a heat pump. These are the failures that almost always mean replacement. The cost of the component on an old system rarely makes sense.
Assess →Rising Energy Bills
If your energy costs are climbing but usage hasn't changed, your system efficiency has dropped. Old systems operating well below their rated efficiency waste 20 to 35 cents of every energy dollar. A new system pays for itself.
Save →
Why Professional Heating Replacement Matters
Heating replacement involves safely removing an old system from fuel, venting, distribution, and electrical, then sizing, positioning, connecting, testing, and commissioning a new one. An oversized furnace short cycles. An undersized boiler can't heat every zone. Wrong refrigerant charge destroys a compressor. Bad gas connections leak. Improper venting creates CO hazards. Leaky distribution wastes 20 to 30 percent of output.
Licensed heating specialists calculate your exact heat load, select the right system type and size, run all connections to code, wire controls and safety devices, perform commissioning tests, balance heat delivery to every zone, and coordinate permits and inspections regardless of system type.
Proper Sizing
Load calculated, not guessed
Full Code
Every connection to standard
Commissioned
Every zone tested and balanced
Heating Replacement FAQs
Common heating replacement questions answered by our licensed specialists serving Whatcom and Skagit Counties.
How much does heating replacement cost?
Heating system replacement typically runs $3,500 to $15,000 depending on system type, efficiency, size, and complexity. Furnace swaps are lower end. Boiler replacements and system type conversions run higher. We provide detailed written quotes.
How long does replacement take?
Furnace replacement takes 1 day. Boiler replacement takes 2 to 3 days. Heat pump replacement takes 1 to 2 days. System type conversions with new distribution take 3 to 5 days. We provide exact timing with your quote.
Can I switch system types?
Yes. We convert furnace to heat pump, boiler to radiant, oil to gas, forced air to hydronic, and any other combination. We evaluate your existing infrastructure and recommend the most practical and cost effective path.
Do you remove the old system?
Yes. Every replacement includes disconnecting fuel, venting, distribution, and electrical, physically removing the old system from your home, and proper disposal or recycling. We handle everything start to finish.
How do I know which system is best?
Depends on your home, existing infrastructure, and priorities. Furnaces are most common and cost effective. Boilers provide the most even heat. Heat pumps are most efficient and also cool. We evaluate on site and recommend honestly.
Do I need a permit?
Yes. Most jurisdictions in Whatcom and Skagit Counties require mechanical, gas, and sometimes plumbing permits for heating replacement. We handle all permit applications, fees, and inspection scheduling as part of our service.
Can I add cooling during replacement?
Yes. Replacement is the ideal time to add air conditioning. Heat pumps provide both heating and cooling. We also install matched furnace and AC systems. Installing both at once saves labor and ensures full compatibility.
Will my existing distribution work?
In most like for like replacements, yes. We inspect your existing ductwork or piping during the swap, seal leaks, repair damage, and verify proper flow. If distribution is undersized or damaged we recommend upgrades during replacement.
What areas do you serve?
We replace all heating systems across Whatcom and Skagit Counties including Bellingham, Mount Vernon, Anacortes, Burlington, Sedro Woolley, Ferndale, Lynden, and surrounding areas.