Summary: Buying a new air conditioner is a major investment. This comprehensive buying guide helps Chicago homeowners understand efficiency ratings, system types, sizing, and brands.
Understanding SEER2 Ratings
SEER2 (Seasonal Energy Efficiency Ratio 2) is the updated efficiency standard introduced in 2023. The minimum in Illinois is 14 SEER2 for air conditioners. Here's what different ratings mean:
- 14–15 SEER2: Meets minimum standards, entry-level cost
- 16–18 SEER2: Good efficiency, moderate price premium
- 19–22 SEER2: High efficiency, significant energy savings
- 22+ SEER2: Premium efficiency, variable-speed technology
System Types
Central split system: Most common. Outdoor condenser + indoor air handler/coil. Requires existing ductwork. Best for whole-home cooling.
Packaged unit: All components in one outdoor cabinet. Common for homes without basements or attic space. Installation is simpler.
Ductless mini-split: No ductwork required. Excellent for additions, older homes, and targeted cooling. Higher efficiency than central systems.
Sizing: Bigger Is NOT Better
An oversized AC cools the home too quickly without removing enough humidity — leaving you cold and clammy. An undersized unit runs constantly and can't keep up on hot days. Proper sizing requires a Manual J load calculation, not guesswork or "one ton per 500 sq ft" rules of thumb.
Top Brands We Recommend
- Carrier: Excellent reliability, wide parts availability
- Trane: Premium build quality, industry-leading warranty
- Lennox: Highest SEER ratings available, excellent efficiency
- Rheem: Great value, solid warranty
- Goodman: Budget-friendly, decent reliability for the price
Chicago Service HVAC provides free in-home assessments and equipment quotes with no sales pressure. We help you find the right system for your home and budget. Call {PHONE}.
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