Costs & pricing · August 2026 · HVAC Iowa City
What replacing a whole HVAC system involves
Sometimes the question isn't the furnace or the air conditioner, it's both. Whole-system replacement is the biggest HVAC decision an Iowa City homeowner makes, so it deserves a plain explanation of what the project actually is, when pairing the two makes sense, and what moves the price.
Start with when to pair. The honest rule: replace both only when both are actually old. The two systems share the blower and the ductwork, so if the furnace and AC are both deep into their service lives, doing them together saves real labor and gets you matched equipment that's designed to work as one system. But if your AC is ten years younger than your furnace, bundling it into the job is usually a sales tactic, not engineering. We quote the paths separately so you can see the difference.
What moves the price? The same forces that move any installation, multiplied by two. Size comes first, and size means measuring the house, not copying the old stickers. The median Iowa City home was built in 1984, per Census Bureau housing data, and a house that's gained windows, insulation, or a finished basement since then needs different equipment than it did originally.
Ductwork is second. A whole-system replacement is the one moment when duct problems are cheapest to fix, because everything is already open. A quote that never mentions your ducts either found very good news or didn't look.
Efficiency tiers are third, and they matter twice here: a long heating season and a humid summer both bill you through the same ducts. Higher-efficiency equipment costs more up front and less every month after, and the right balance is your call, which is why a fair quote shows options rather than one number.
Then the parts people forget: the Iowa City mechanical permit and inspection, haul-away of two old units, a proper startup, and a walkthrough of the new controls. Each belongs in the quote, in writing, before the work starts.
Timeline-wise, plan for more than a simple swap, and plan it in a shoulder season if you can. September beats the first cold snap, and April beats the first heat wave, in both calm and choice. When you're ready to price it for your house, we measure first and put the whole thing in writing, both paths, our honest pick named.