Precision AC Installation.

Installing an air conditioning system is not a matter of simply swapping an old unit for a new one of the same size. The tonnage, airflow, and refrigerant charge must be mathematically matched to the specific thermal characteristics of your home. At Aurora HVAC Services, every installation begins with an ACCA Manual J Load Calculation—a mathematical model that accounts for your home's square footage, insulation R-values, window orientation, ceiling heights, and occupancy.

Why Manual J is Non-Negotiable.

An oversized AC unit is one of the most destructive things that can happen to an Aurora home. An oversized system cools the air temperature (sensible heat) too quickly, satisfying the thermostat before the system has run long enough to strip moisture (latent heat) from the air. The result is a cold, clammy house with humidity levels above 60%, creating a perfect environment for mold growth. Additionally, the compressor short-cycles—turning on and off rapidly—which generates immense wear on the contactor, capacitor, and compressor windings, cutting the system's lifespan in half. Our Manual J calculation accounts for the thermal envelope of your specific home, producing an exact BTU capacity requirement. We then select a SEER2-rated system that matches this calculation precisely.

Commissioning Protocol.

Our installation commissioning protocol separates us from every other contractor in the Fox Valley. First, we flow inert nitrogen gas through the copper linesets during all brazing operations. Brazing without nitrogen allows the extreme heat to react with the oxygen inside the copper, creating copper oxide scale—commonly called "black death"—that flakes off and restricts the metering device, eventually starving the evaporator coil. Second, after all connections are sealed, we pull a deep vacuum below 500 microns using a high-capacity vacuum pump. This process boils off any microscopic moisture trapped in the lines. Moisture mixed with refrigerant creates hydrofluoric acid, which will corrode the compressor from the inside out over 2-3 years. Only after the vacuum holds at sub-500 microns do we charge the system with refrigerant, measuring subcooling and superheat to verify factory specification.

The SEER2 Standard.

As of January 2023, the Department of Energy replaced the original SEER rating with SEER2, which increases the external static pressure (ESP) during testing from 0.1" WC to 0.5" WC. This more accurately simulates real-world ductwork conditions. The practical effect is that older SEER ratings were inflated compared to actual field performance. A system rated at 16 SEER may only be 14.3 SEER2. We educate our Aurora customers on these new standards and ensure the installed system meets the advertised SEER2 efficiency in their actual home, not just in a laboratory.