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Full services directory How it worksFor prosAbout Get matched Call (866) 582-8523The questions homeowners ask most are what a system costs, how long it lasts, whether to repair or replace, and whether tax credits apply. In 2026, full replacement generally runs $5,000 to $28,000 (CBS News), furnaces last 15 to 30 years and AC and heat pumps 15 to 20 (Carrier), and the IRS states the 25C credit applies to property placed in service before December 31, 2025.
Most bad HVAC outcomes come from three things: buying under time pressure during a breakdown, accepting a single bid, and skipping the load calculation. Those are all avoidable, and avoiding them costs nothing but a few days.
The second most common problem is comparing bids that aren't comparable. If one quote includes duct replacement and another doesn't, the cheaper one isn't cheaper. HVAC Project Cost puts duct repairs at $500 to $1,500 and full replacement at $2,000 to $5,000 — enough to explain most confusing price gaps.
If you take one thing from this page: get the total cash price in writing, from three contractors, for the same defined scope, and don't sign on the first visit.
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