A furnace sized just one ton too large will short-cycle through a Naperville winter, wearing out its ignitor and blower long before its time while leaving cold spots in back bedrooms. Correct sizing is where a good heating installation begins, and it is the single detail that separates a system you forget about from one you fight with every January. At All Temp Heating & Air Conditioning, sizing is calculated with a room-by-room load analysis rather than a rule of thumb, so the equipment matches the actual square footage, insulation, window count, and layout of your home.
Getting the Sizing and Selection Right
Heat loss in a home is measured in BTUs, and a proper Manual J load calculation accounts for factors many quick estimates ignore. We look at ceiling height, ductwork condition, air infiltration, and the direction your home faces. A drafty two-story built in the 1970s has very different demands than a tightly sealed new construction near downtown Naperville, and the equipment we recommend reflects that difference.
Once the load is known, we match it to a furnace or heat pump with the right output and efficiency rating. Gas furnaces are measured by AFUE, or Annual Fuel Utilization Efficiency. A 96 percent AFUE furnace converts nearly all its fuel into usable heat, which matters over a long Illinois heating season. As one of Bryant’s highest-rated dealers in the nation, All Temp Heating & Air Conditioning installs equipment that carries strong warranties and proven cold-climate performance.
The Installation Process We Follow
A clean installation protects your investment for the fifteen to twenty years the system should last. Our technicians follow a consistent sequence so nothing is missed and your home is left better than we found it.
- Home evaluation and load calculation: We measure the space, inspect existing ductwork, and confirm gas line and electrical capacity before recommending equipment.
- Old equipment removal: The existing furnace is disconnected safely, and refrigerant or gas connections are handled to code.
- New unit placement and connection: The furnace is set level, connected to supply and return plenums, and sealed to prevent air leakage.
- Venting and combustion setup: Flue and intake piping are installed with correct slope and clearances to keep combustion safe.
- Startup and testing: We verify gas pressure, temperature rise, and airflow, then calibrate the thermostat before walking you through operation.
Each step has a technical purpose. Temperature rise, for example, must fall within the manufacturer’s specified range, usually 40 to 70 degrees. Too high and the heat exchanger overheats, too low and the system runs inefficiently. Measuring and adjusting this at startup is a detail that shortcuts skip.
Applications Across Naperville Homes
No two heating projects look alike, and our crews handle a wide range of situations across the area. Common scenarios include:
- Full furnace replacement: Swapping an aging or failed unit for a modern high-efficiency model that lowers utility bills.
- New construction and additions: Sizing and installing heating for finished basements, room additions, or newly built homes.
- Boiler-to-forced-air conversions: Reconfiguring older radiant homes when owners want central cooling paired with heat.
- Heat pump installation: Adding dual-fuel systems that pair electric heat pumps with a gas furnace for cold snaps.
- Whole-home comfort upgrades: Combining a new furnace with humidifiers, air purifiers, and ventilation for balanced indoor air.
Beyond furnaces, All Temp Heating & Air Conditioning sells and installs boilers, water heaters, humidifiers, and ventilation equipment, so a single visit can address more than just the heat source. If your dry winter air causes static and cracked woodwork, a whole-house humidifier tied into the new furnace fixes the root cause rather than treating symptoms with portable units.
Why Naperville Families Choose Us
All Temp Chicago Heating & Air Conditioning has become the first choice for tens of thousands of families throughout the Chicago and suburban areas, and that reach comes from doing the fundamentals well. We remain a family owned and operated company, which shapes how we treat each home. Our courteous, fast, and friendly staff explains options clearly, respects your time, and cleans up thoroughly when the work is done.
We serve Naperville along with Chicago, Bolingbrook, Skokie, Evanston, Lincolnwood, Morton Grove, Niles, Park Ridge, Woodridge, and Darien, IL, bringing the same standards to every job. When you invest in a heating installation, you are buying two decades of comfort, and the quality of that installation determines whether those years are quiet or troublesome. Reach out to All Temp Heating & Air Conditioning to schedule an in-home evaluation, and let our team size, select, and install a heating system built to carry your family through every Illinois winter.