Cost of Full AC & Furnace Replacement in OKC: What to Expect

A full system replacement — swapping out both the air conditioner and furnace together — is one of the biggest investments a homeowner makes in their house, and one of the most common calls we get across the OKC metro. Here's what actually drives the price, and how to know if repair or replacement is the right call.

Average Cost of a Full System Replacement in OKC

A complete AC and furnace replacement in the Oklahoma City area typically runs $14,000 to $19,000+ depending on home size, equipment tier, and ductwork condition. Most homeowners land in the $16,000–$18,000 range for a mid-tier, correctly-sized system in a standard 2,000–2,800 sq ft home.

What moves the price:

• Tonnage/sizing — larger homes or homes with poor insulation need more capacity, which costs more
• SEER2 efficiency rating — higher-efficiency units cost more upfront but lower monthly bills
• Ductwork condition — if ducts need sealing, resizing, or replacing, this adds meaningfully to project cost
• Furnace fuel type — gas furnace replacement pricing differs from electric or heat pump systems
• Permits and disposal — proper removal and disposal of the old system, plus city permitting, is included in a legitimate quote

Signs You Need Replacement, Not Repair

A system nearing the end of its life usually shows more than one of these signs at once:

• The system is 12–15+ years old
• Repair costs in the last 12 months have approached or exceeded 30–50% of replacement cost
• Energy bills have climbed noticeably without a change in usage
• The home has uneven temperatures room to room
• The refrigerant is R-22 (phased out), making repairs expensive and parts hard to source

A single AC or furnace failure doesn't always mean full replacement — but when both units are original to the home and approaching the same age, replacing them together is usually more cost-effective than repairing one and replacing the other within a year or two.

Full Replacement vs. Repairing One Unit

Replacing the AC and furnace together, rather than one at a time, saves on labor (one visit instead of two), ensures the two units are matched for efficiency, and often qualifies for better financing or rebate bundling than a single-unit swap.

What's Included in an Above + Beyond Full System Replacement

• Load calculation to correctly size the new system for your home (not just "matching" what was there)
• Removal and disposal of the old AC and furnace
• New equipment installation, including thermostat compatibility check
• Ductwork inspection, with sealing or repair recommendations if needed
• Permitting and final inspection coordination
• Manufacturer and labor warranty registration

Frequently Asked Questions

How much does it cost to replace an AC and furnace together in Oklahoma City? A full AC and furnace replacement in the OKC metro typically costs between $14,000 and $19,000+, with most homeowners paying $16,000–$18,000 for a correctly-sized, mid-tier system.

Is it cheaper to replace the AC and furnace at the same time? Yes, in most cases. Replacing both units in a single project saves on labor since it's one installation visit instead of two, and it ensures the new AC and furnace are properly matched for efficiency.

How long does a full HVAC system replacement take? Most full AC and furnace replacements are completed in one day, though homes needing significant ductwork repair may take longer.

How often should a full AC/furnace system be replaced? Most systems last 12–15 years with regular maintenance. Once a system passes that age and repair costs start climbing, replacement is usually the more cost-effective choice.

Does Above + Beyond offer financing for HVAC replacement?

Yes, financing options are available for qualified homeowners to help spread the cost of a full system replacement over time.