Reply by Lifesaver2000

When I had my heat pump system installed, I had a problem similar to yours, with bedrooms at the far end of the house not getting enough air. The installer on my system had installed dampers in each of the various outputs from the air handler, so it was a simple matter of partly closing down those lines that were closer to the handler, forcing the air into the longer lines. A bit of trail and error was all that was needed to get a uniform temperature throughout the house.

The advantage of having the dampers at the handler is that you don’t get the noise problem that comes from partially closing down the individual registers, or the problem with someone opening the registers and messing up your flow balancing. These dampers were not something I had asked for extra, but just part of the standard installation from my HVAC contractor. They may be on yours as well.