Replacing your air conditioner is a major investment. The right decision isn’t about choosing a popular brand or the lowest price — it’s about proper design, correct sizing, and quality installation that delivers comfort and reliability for years to come.
This guide explains what truly matters before you buy.
1. Your Home & Existing System Matter First
- Know the age and condition of your current system
- Identify comfort problems (hot rooms, humidity, noise)
- Understand your home’s insulation, windows, and layout
- Ductwork issues can undermine any new system
2. Proper Sizing Is Critical
- The system must be sized using a Manual J load calculation
- Oversized systems short cycle and cause humidity problems
- Undersized systems run constantly and struggle in heat
- Never size a system based only on the old unit
3. Efficiency Ratings (SEER2)
- Minimum efficiency systems cost less upfront
- Mid-range efficiency usually offers the best value
- High-efficiency systems cost more and take longer to pay back
- Ask what efficiency level makes sense for your usage
4. AC vs Heat Pump
- Traditional AC cools only and works with a furnace
- Heat pumps both heat and cool and are more efficient
- Heat pumps may qualify for tax credits and rebates
- Climate and future plans matter when choosing
5. Refrigerant Changes
- Older refrigerants are being phased out
- Newer refrigerants are more future-proof
- Long-term service costs depend on refrigerant choice
6. Installation Quality Matters More Than Brand
- Even premium equipment fails if installed poorly
- Contractor skill, setup, and testing are critical
- Proper airflow and refrigerant charge are essential
7. Understand the Full Installed Cost
- Equipment and labor
- Permits and inspections
- Electrical or duct modifications
- Thermostat upgrades
- Warranty registration
8. Warranties & Maintenance
- Parts warranties on compressors typically last 10–12 years
- Miscellaneous parts typically last between 2-8 years
- Labor warranties vary by contractor
- Annual maintenance may be required to keep coverage valid
9. Comfort & Technology Options
- Variable-speed systems improve comfort and humidity control
- Zoning can solve uneven temperatures
- Smart thermostats improve efficiency and convenience
- Air quality upgrades are optional
10. Rebates, Tax Credits & Financing
- Incentives vary by location and system type
- Must be confirmed before purchase
- Financing options may be available
AC Replacement: What You Need to Know
If you’re a homeowner in Killeen considering an AC replacement, it’s important to look beyond just price and brand. A successful replacement starts with understanding your current system, ensuring accurate sizing, and working with qualified local professionals who know Killeen’s climate and comfort needs. This guide helps you make the best decision for long-term performance and energy savings.