What a new furnace or AC costs in Rockford
Short answer
$4,000 to $9,000 for a furnace
A replacement gas furnace typically runs $4,000 to $9,000 installed and a replacement central AC $4,500 to $9,500, with a full matched system usually landing between $8,000 and $16,000.
Installed cost including removal of the old unit. Published national cost data, not a local survey. Get quotes from at least three companies before you commit.
What moves the price
- Efficiency rating
- A 96% AFUE furnace costs more up front than an 80% and pays it back over years, not months. In a climate with Rockford's winters the payback is real, but it is slower than a salesperson usually implies.
- Sizing
- An oversized furnace short-cycles, wears out sooner and heats unevenly. A contractor who sizes by a load calculation rather than by matching whatever is there now is doing it properly.
- Ductwork
- If the ducts are undersized or leaky, a new unit will underperform. This is the single most common reason a replacement disappoints, and it is rarely in the first quote.
- Emergency versus planned
- A furnace replaced in January during a cold snap costs more and gives you no time to compare. Replacing a 20-year-old unit in autumn is materially cheaper.
What is different about Rockford
Rockford runs long heating seasons and short intense cooling ones, so furnace capacity matters more here than AC capacity. A unit that fails in a January cold snap is the worst time to be shopping, which is why several local companies push autumn tune-ups.
What to ask before you sign
- Did you do a load calculation, or size it off the old unit?
- Is the quote for the furnace alone or a matched system?
- What is included in the first year, and what is the labour warranty?
- Will my existing ductwork handle this unit?
- What does the permit and inspection add?