A Single-Room Air Conditioner Superior to a Window Unit At AW Heating & Air Conditioning we know the worries with window air conditioning units in Lincoln. They let insects in. They let rain in. Worst of all, they can let burglars in. We have a better solution. A mini-split air conditioner is a more secure and more efficient solution for your single-room cooling needs. With it’s ductless design, this type of air conditioner can help cool that sunroom that’s to warm or that family room that is difficult to cool. What’s more, it’s simple to install and doesn’t come with the possibility of complicated future modifications. Ask AW Heating & Air Conditioning in Lincoln how you can benefit from a mini-split air conditioner. Our HVAC experts can also service your existing unit. Call us at 402-318-5351 or schedule your appointment online today. * SEER, or Seasonal Energy Efficiency Ratio, measures the cooling efficiency of your air conditioner or heat pump. A higher SEER rating means greater energy efficiency and more savings for you and the environment.