Pittsburgh averages 15 to 20 days per year above 90 degrees, but the humidity makes it feel worse. When your dew point sits in the high 60s during July, your air conditioner runs longer cycles to pull moisture out of the air. An aging system with a weak compressor or a fouled evaporator coil cannot keep up. You end up with a cool house that feels clammy because the system is not dehumidifying effectively. That drives mold growth in basements and makes your indoor air quality worse. If your AC cannot handle latent heat load removal, repair costs stack up fast as you chase secondary failures caused by extended runtime.
Local HVAC contractors in Pittsburgh understand the difference between a system that works in Arizona and one that works here. We size equipment for humidity removal, not just temperature drop. We also know the permitting process through Allegheny County and the local inspection requirements for refrigerant handling. Choosing a contractor who understands the regional climate and the local regulatory environment means you get a system that performs in real-world Pittsburgh conditions and passes inspection without delays or rework. That matters when you are making a multi-thousand-dollar decision.