Heating · Chicago, IL
Furnace Installation in Chicago, IL
A new furnace is only as good as its sizing and its ductwork. We measure the house before we quote the equipment.
What furnace installation actually involves
We size furnaces from a room-by-room load calculation — square footage, insulation, window area and orientation, infiltration — not from whatever BTU rating was on the old unit. Oversizing is the single most common installation mistake in this market: the furnace satisfies the thermostat in four minutes, shuts off, and leaves the far bedrooms cold while cycling itself toward an early failure. We also check that your existing return and supply ducts can actually carry the airflow the new system needs, and say so if they can't.
Chicago's bungalow belt is its own HVAC discipline. A classic 1920s brick bungalow has a finished or semi-finished attic, a low-headroom basement, gravity-converted ductwork with oversized trunks and undersized branches, and almost no wall insulation. The attic bedroom is always the hottest room in the house in July and the coldest in January, and no amount of new equipment fixes it without addressing the duct and the envelope.
What that means for furnace installation here: Bungalow-belt gravity conversions, attic bedrooms, and homes with radiator heat and no ducts at all.
Signs you need furnace installation
- Your furnace is over 15 years old and has needed two or more repairs in the last two winters
- Rooms furthest from the furnace never get warm
- You're adding square footage or finishing a basement
- Heating bills climb every year with no change in habits
- The existing furnace is an 80% AFUE unit and you plan to stay in the house
How the visit goes
Book
Describe the symptoms and give us the Chicago address. We’ll confirm a window.
Diagnose
We test, find the cause, and explain the options with prices attached.
Get comfortable
You approve the work. We do it, then show you what changed.
Questions
Furnace Installation FAQs
For a house you plan to keep, a 95%+ AFUE condensing furnace usually pays back through Chicagoland's long heating season. For a home you're selling in two years, the math often favours a well-installed 80% unit. Venting matters too — condensing furnaces need PVC to the outside, which not every older home can route easily.
Most straight swaps are a single day. Adding condensate drainage, new venting, or duct modifications can push it to two. We tell you which one you're looking at during the estimate.
Permit requirements differ from one Chicagoland municipality to the next. We'll tell you what your town requires and walk you through it as part of the installation, so it's one less thing you have to track down yourself.
No, and it's the most expensive myth in the trade. An oversized furnace short cycles, distributes heat unevenly, and wears out faster. The load calculation exists to prevent exactly that.
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