Committed to Being the Company You Can Trust


Small Beginnings

Established in 2014 by Nathan Krieser with just two employees, A4K has grown to employ 14 skilled journeymen, technicians and installers and continues to grow as we provide the best service possible to the people of Lincoln, Seward and surrounding communities.


It’s at the core of our company, right down to the name.

The 4 ‘A’s represent the names of Nathan’s wife and three daughters and ‘K’ for his son. At A4K your family’s comfort and needs come first. We strive to treat every customer as we would want our family to be taken care of.