What is one sign of poor furnace installation?

Uneven temperatures in different rooms are a clear indicator of poor furnace installation. When a furnace is properly installed, it should effectively distribute heat throughout the entire building, leading to consistent heating in all areas. If you notice that certain rooms are markedly colder or hotter than others, it may suggest issues such as improper ductwork, inadequate sizing of the furnace for the space, or poor placement of vents and registers. These factors can disrupt the normal airflow and heat distribution, resulting in discomfort and inefficiency.

In contrast, consistent heating throughout the building, quick heating time, and low noise operation typically reflect a well-functioning and correctly installed system. A furnace that heats quickly or runs quietly while maintaining even temperatures indicates that the installation was done correctly, allowing for both efficiency and comfort.