System Replacement

System size is measured in tons and depends on your home’s square footage, insulation, number of windows, and layout. A 3.5-ton system typically covers 1,800 to 2,200 sq ft, a 4-ton system covers 2,200 to 2,600 sq ft, and a 5-ton system covers 2,600 to 3,200 sq ft in the DFW climate.

As of 2023, the minimum SEER2 rating in Texas is 15. Higher-efficiency systems (17 to 20 SEER2) cost more upfront but save significantly on energy bills. For most DFW homes, a 16 SEER2 system offers the best balance of cost and efficiency.

Consider replacement if your system is over 15 years old, requires frequent repairs, has rising energy bills, uses R-22 refrigerant, or can no longer keep your home comfortable. A system that needs a major repair costing more than half its replacement value is usually better off being replaced.

Not always. If your existing ductwork is in good condition, properly sized, and well-sealed, it can be reused. However, if you have significant leaks, damaged sections, or undersized ducts, replacing or modifying the ductwork will improve system performance.

A complete replacement includes a new outdoor condenser unit, indoor evaporator coil or air handler, new refrigerant lines, a thermostat upgrade, and all labor. Ductwork modifications and electrical upgrades are typically additional costs.

Many manufacturers offer rebates on qualifying systems. Some Texas utility companies also provide energy efficiency rebates. Most HVAC companies offer financing options with terms ranging from 12 to 72 months.

A standard replacement takes 1 to 2 days depending on the complexity. If ductwork modifications, electrical upgrades, or structural changes are needed, it can take an additional day.

A properly installed and maintained HVAC system typically lasts 15 to 20 years. Regular maintenance including annual tune-ups, filter changes, and keeping the outdoor unit clear of debris can maximize its lifespan.