Hot summers and sudden cold spells put both sides of a heat pump to work
A heat pump has a practical role in Merkel because it handles the long cooling season as well as the more moderate stretches of winter weather. During summer, it must move heat out of the house through high outdoor temperatures, so cooling performance depends on proper capacity, airflow, and the way the ducts deliver conditioned air through the rooms. A system selected around heating alone can miss what the hottest part of the year demands.
The sharp cold outbreaks that interrupt an otherwise moderate winter deserve equal attention. As the temperature outside drops, the heat pump has less heating output available and may need its supplemental heat source to carry more of the load. The controls that call for backup heat, the defrost cycle, and the electrical capacity all shape how the system behaves during those colder periods.
That calls for a year-round evaluation rather than a heating-only or cooling-only decision. We look at how the heat pump carries the home through the dominant hot season, then consider whether the heating arrangement stays dependable when Merkel weather turns cold quickly.