When to Replace vs. Repair Your Furnace

Factors to Consider When Deciding Between Repair and Replacement

Age of Your Furnace

The age of your furnace is one of the most important factors to consider:

• If your furnace is less than 10 years old, repair is often the most cost-effective option
• For furnaces 10-15 years old, consider the frequency and cost of repairs
• If your furnace is over 15 years old, replacement is often the better long-term investment

The 50% Rule

A common guideline in the HVAC industry is the 50% rule:

• If the cost of repairs is more than 50% of the cost of a new furnace, replacement is usually the better option
• Consider the cumulative cost of repairs over the past 2 years

Energy Efficiency

Newer furnaces are significantly more efficient than older models:

• Modern high-efficiency furnaces can have AFUE ratings of 95% or higher
• Furnaces from the 1990s typically have efficiency ratings of 80% or less
• The energy savings from a new, efficient furnace can offset the cost of replacement over time

Frequency of Repairs

Consider how often your furnace needs repairs:

• If you've needed repairs more than once in the past two heating seasons, it might be time to consider replacement
• Increasing frequency of repairs often indicates a system in decline

Comfort Issues

Your comfort matters when making this decision:

• If your furnace struggles to maintain consistent temperatures throughout your home
• If some rooms are too hot while others are too cold
• If your system is becoming increasingly noisy
• If you notice increasing dust or humidity issues

Benefits of Replacing Your Furnace

• Improved energy efficiency and lower utility bills
• Enhanced comfort with better temperature control
• Newer safety features
• Reduced carbon footprint
• Warranty coverage on a new system
• Potential tax credits or utility rebates for high-efficiency models

When Repair Makes More Sense

• Your furnace is less than 10 years old
• The repair is simple and affordable
• Your furnace has been reliable with minimal previous repairs
• You're planning to move within the next few years
• You're not in a position to invest in a new system right now

Every situation is unique, and the right decision depends on your specific circumstances. A professional assessment can help you evaluate the condition of your current system and make an informed choice.