A ductless mini split system is one of the most efficient and comfortable ways to heat and cool a home. But like any HVAC system, proper installation is key to long-term reliability. One of the most overlooked yet critical steps during installation is making sure the indoor wall-mounted unit is perfectly level. Even a slight tilt in ...
The whistling noise is a direct result of air being pulled through a small gap or restriction. In this case, it’s happening at the filter rack. When air moves through tight spaces at high velocity, it creates turbulence, leading to the whistling sound. The fact that touching the filter stops the noise suggests that the ...