Learn
The basics
An air conditioner doesn't make cold — it moves heat out of your home using a refrigerant cycle. Efficiency is rated by SEER2; capacity is measured in tons.
- How it cools: Refrigerant absorbs heat indoors at the evaporator coil and releases it outside at the condenser. The blower moves conditioned air through your ducts.
- SEER2 & tonnage: SEER2 rates seasonal efficiency (higher = lower bills). Tonnage is capacity — 1 ton ≈ 12,000 BTU/hr — and should come from a Manual J load calculation.
- Repair vs. replace signs: Under ~10 years with a minor fault usually means repair; 12–15+ years, frequent repairs, or a quote near half the cost of new usually favors replacement.
Compare
Your options
Repair the existing system, or replace it — what fits your home and budget?
Repair
Best for newer systems and small faults (capacitor, refrigerant leak, clogged drain). Lowest upfront cost; keeps an aging system going.
Replace (standard efficiency)
A right-sized new system restores reliability and warranty. Good value when the old unit is past its prime.
Replace (high efficiency / variable speed)
Higher SEER2 and better humidity control lower bills and improve comfort — higher upfront cost, faster payback the longer your cooling season.
An oversized AC short-cycles and leaves your home humid; an undersized one runs constantly and can't keep up in July. We size with a load calculation, not a rule of thumb.
Act
Free replacement estimate & same-day repair across the Austin metro
100% woman-owned, licensed, insured, and EPA certified. Trane & Daikin factory-trained installers serving Round Rock, Austin, and surrounding communities.
- Why is my AC running but not cooling?
- Common causes are a dirty filter, low refrigerant from a leak, a frozen coil, or a failing compressor. Turn it off to protect the compressor and call us for same-day service.
- What size AC do I need?
- It depends on square footage, insulation, windows, and ductwork. We run a Manual J load calculation before recommending equipment.
- Do you offer financing on replacements?
- Yes — flexible financing is available so a new system doesn't have to wait. Estimates are always free.
Educational only — not a substitute for an on-site evaluation. Recommendations depend on your home, equipment, and local code, which change over time; confirm specifics with a licensed professional. Reviewed by the Holman Comfort Systems team · Last updated June 18, 2026.