Costs & pricing · August 2026 · HVAC Iowa City
What decides the cost of a new furnace in Iowa City
If you call around Iowa City asking what a new furnace costs, an honest company will not give you a number on the phone. That's not evasion. It's because furnace replacement cost depends on the house, and no two houses ask for the same furnace. Here's what actually moves the number, so you can judge the quotes you get.
The first factor is size, and size means measurement. The lazy way to size a furnace is to read the sticker on the old one and order the same. But the median Iowa City home was built in 1984, per Census Bureau housing data, and forty-year-old houses change: new windows, added insulation, a finished basement. A furnace sized for the house as it was in 1984 is often the wrong furnace today. An oversized unit short-cycles itself to an early death, and an undersized one runs flat out on the coldest nights and still loses. The measurement visit is where the right price starts.
The second factor is ductwork. A new furnace pushing air through leaky or crushed ducts is a good engine in a bad car. Sometimes the quote should include sealing or correcting a few runs, and sometimes it shouldn't. A company that never mentions your ducts either has very good news or hasn't looked.
Third is the efficiency tier. Higher-efficiency furnaces cost more up front and burn less gas every winter after. In a heating season as long as ours, that math matters more than it does in mild climates, but it still has to be your call. That's why a fair quote shows options, from good to better to best, instead of one take-it-or-leave-it number.
Fourth is the permit. Iowa City requires a mechanical permit and an inspection for a new furnace, and the contractor must hold a state license. The permit belongs in the quote, handled by the contractor. It protects you: the work goes on record, which matters the day you sell the house.
Last is what you don't see: haul-away of the old unit, a proper startup and walkthrough, and someone answering the phone when you have a question in February. Cheap quotes are usually cheap somewhere specific. Find where.
One more factor people forget: timing. A furnace replaced on your schedule, in September or in April, is a calm project with time to compare options. The same furnace replaced during the first cold snap of an Iowa City winter is an emergency, and emergencies never shop well. If your furnace is old enough that you're reading this guide, the cheapest version of this project is probably the one you plan ahead.
So when you gather quotes in Iowa City, compare them on those five things, not just the bottom line. And if you'd like one of the quotes to be ours, we'll measure the house first and put the furnace replacement cost in writing, with options. If the old furnace honestly has winters left in it, we'll tell you that instead.