PJ MAC HVAC Service & Repair in Upper Darby provides 24-hour heating and cooling repair, installation, and maintenance services for residential and commercial customers. We offer free estimates on all brands of heating or cooling systems, including Lennox, Carrier and Trane. If your AC is blowing hot air, or your furnace is not coming on, call our rapid response emergency HVAC repair service. We also install humidifiers, dehumidiers, mini-split systems, thermostats, and air purifiers. Call our Upper Darby HVAC company today. We serve: Upper Darby, PA, Havertown, PA, Kirklyn, PA, Highland Park, PA, Penn Wynne, PA, Wynnewood, PA, West Gate Hills, PA, Llanerch, PA, Kirklyn, PA, Ardmore, PA, Haverford Township, PA, Broomall, PA, Overbrook Park, PA, Bryn Mawr, PA, Aronimink, PA