Tonnage. A 2.5-ton single-stage system is the cheapest install we do; a 5-ton variable-speed two-stage with matched air handler and furnace is the most expensive.
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Jul 28, 2025
Cost to Replace an HVAC System in Plano (2025 Guide)
A full HVAC replacement in Plano runs $7,000 to $18,000 in 2025. That's a wide range — here's what actually moves the number.
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