Infinity Heating & Air
Family-owned HVAC team · Graham, WA
WA Lic. INFINHA841B8
WA Lic. INFINHA841B8
Quick answer
Most Puget Sound homeowners pay $9,000–$15,000 for a fully installed central AC. Federal Way homes are mostly 1960s–80s ramblers and split-levels running original ducts or electric baseboard, and mild damp winters and summers that increasingly justify real cooling shapes sizing out here. Representative Puget Sound installed ranges (Eco Services WA published benchmark, July 2026). Your Infinity written quote after a free on-site load calculation is exact. Call (253) 740-5135 for Infinity's exact written quote after a free on-site load calculation.
- Central AC installs typically run $9,000–$15,000 in the Puget Sound (Eco Jul 2026 — ~16 SEER2 class).
- Homes with a furnace and usable ducts can often add AC without a full duct replacement.
- A Manual J load calculation prevents an oversized system that cools fast but leaves rooms humid.
- Many South Sound homeowners compare AC-only vs a heat pump that also heats ($12,000–$20,000).
Good, Better, Best — Central AC Installation options in Federal Way, WA
| Tier | Option | Typical range | What it includes |
|---|---|---|---|
| good | Good — Standard Efficiency Central AC | $9,000–$12,000 | Single-stage central AC with matched coil, basic controls, and haul-away — toward the low end of the Eco Puget Sound AC band. |
| better | Better — ~16 SEER2 Central AC | $9,000–$15,000 | 3-ton-class ~16 SEER2 central AC installed and removed — Eco's published central AC band for typical Puget Sound homes. |
| best | Best — Two-Stage / Inverter AC | $12,000–$15,000 | Two-stage or inverter AC for quieter operation and better humidity control through South Sound heat waves. |
Get a free second opinion on any quote
Ranges on this page are educational. A licensed Infinity tech verifies another company's quote or diagnosis for free — honest read, no pressure.
What factors affect Central AC Installation prices in Federal Way, WA?
| Factor | Impact | Local note |
|---|---|---|
| Home size & ductwork condition | Bigger homes or leaky/undersized ducts need larger equipment or duct repairs before central AC even gets quoted. | A Manual J load calculation — never a square-footage guess — sets the real size. |
| Efficiency tier you choose | Good/Better/Best changes upfront cost, monthly operating cost, warranty length, and comfort. | Higher tiers pay back fastest in homes that run the system hardest — long winters or hot summer stretches. |
| Electrical panel & disconnect capacity | Older panels sometimes need an upgrade or a new disconnect to support higher-efficiency equipment. | We check panel capacity during the same visit as the load calculation, before we quote. |
| Local permits — Federal Way Building Division | Permit fees and inspection scheduling are part of the project timeline, not an optional extra. | We pull and manage the permit through Federal Way Building Division (MyBuildingPermit.com) as your licensed contractor. |
| Removal & disposal of old equipment | Hauling away and responsibly disposing of your old system is typically part of an installed quote. | Ask any installer to confirm this line item so quotes compare apples to apples. |
Ready for a real number for your home?
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Common questions about Central AC Installation cost in Federal Way, WA
Where do these central ac installation price ranges come from?
Representative Puget Sound installed ranges (Eco Services WA published benchmark, July 2026). Your Infinity written quote after a free on-site load calculation is exact. Call (253) 740-5135 for a free Infinity estimate sized to your home.
What's included in an installed central ac installation quote?
Equipment, labor, a matched coil or venting where needed, permit fees, and haul-away of the old unit are typically included — ask your installer to confirm scope line by line, since it varies project to project.
Does financing change what I pay per month?
Yes — Synchrony promotional financing lets you spread the project cost over time instead of paying in full upfront. All offers are subject to credit approval and minimum monthly payments are required.
Are utility rebates available for central AC?
Rebate programs vary by utility and change frequently. We check what your utility currently offers when we quote your project and handle the paperwork with you — we don't promise numbers a program may have changed.
Do I need a permit for central AC in Federal Way?
Yes — Federal Way Building Division requires a mechanical permit for central AC replacement (via MyBuildingPermit.com). Infinity pulls and manages the permit as your licensed WA contractor (Lic. INFINHA841B8), so you don't have to.