King County HVAC GuideKnow what you're buying

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Air Conditioning

Seattle-area summers keep getting warmer, and AC is now a common add-on to an existing furnace. The mistake to avoid is shopping by tonnage alone — capacity, efficiency and a matched indoor coil matter more than the headline number.

What to think about first

  • Capacity from a load calculation: an oversized AC cools fast but leaves the house clammy.
  • Efficiency ratings (SEER2) and what they mean for operating cost in a mild cooling climate.
  • Matched coil and furnace/air handler: mismatched components lose efficiency and warranty coverage.
  • Refrigerant lines, electrical circuit and condensate routing for your home's layout.
  • Noise: outdoor unit placement matters in dense King County neighborhoods.

What a complete proposal should state

  • Exact models. Outdoor unit and indoor coil model numbers, capacity and SEER2.
  • Load calculation. The basis for the size selected.
  • Electrical scope. Circuit, disconnect and panel capacity confirmed in writing.
  • Line set & condensate. New or reused line set stated, plus condensate drainage plan.
  • Commissioning. Charge verification and airflow balancing included.
  • Warranties. Equipment and labor terms, in writing.

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Tell us what you're looking for.

Answer a few questions about your home and your project. Your request goes to Allred Heating, and we respond with next steps and a site-specific, itemized proposal — not an advertised starting price.

Request local HVAC quotes Call 206-418-9153