Should I repair or replace my old furnace

The decision between repairing or replacing your furnace depends on its age, repair costs, and efficiency. As a general rule, if your furnace is over 15 years old and repair costs exceed 50% of replacement value, replacement is usually the better investment.

Age is the primary factor in this decision. Furnaces typically last 15-20 years with proper maintenance. If your unit is approaching or past this age, even a successful repair is likely a temporary fix. Older furnaces also operate at much lower efficiency levels - often 80% AFUE or less - compared to today's high-efficiency models that achieve 90-96% efficiency.

Consider the repair cost versus replacement value. In the Ottawa market, major furnace repairs like heat exchanger replacement, blower motor, or gas valve issues can cost $800-1,500. When you're looking at repairs over $1,000 on an older furnace, replacement often makes more financial sense. A new mid-efficiency furnace installation typically runs $3,500-5,000, while high-efficiency models range $4,500-6,500.

Energy savings from a new high-efficiency furnace can be substantial in Ottawa's cold climate. Upgrading from an 80% efficiency furnace to a 95% model can reduce your heating bills by 15-20%. Over the furnace's lifespan, these savings often offset much of the replacement cost. Additionally, new furnaces come with warranties and are far less likely to break down during Ottawa's harsh winters.

Safety considerations are crucial with older furnaces. Heat exchanger cracks can lead to carbon monoxide leaks, which is extremely dangerous. If your HVAC technician identifies safety concerns, replacement isn't optional - it's necessary for your family's protection.

For a professional assessment of your specific furnace and a free replacement estimate, Ottawa HVAC Pro can evaluate your system and help you make the most cost-effective decision for your home.

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