[LEFT]lawrosa stated “Most HVAC units are installed incorrectly from the start with duct work being too small. Starting out with high static pressure. then install a garbage pleated filter and static goes up even more. This reduces the life and performance of your equipment.” Accepting this as valid, I have a question. I have a forced air system with two long legs. One leg receives more air so I added a guillotine style baffle where that leg split from the main trunk. Then smaller similar baffles to the individual runs where they branched from that larger main supply legs until I got the system regulated to where the heating/cooling was balanced as we want it. I am happy with the performance but I do hear the air rushing out out of the most distant vents I did not hear it before making these mods. It is the furthest from the blower and was the room that needed additional air. The house is now much better balanced. Other than making the fan possibly work harder and possibly shortening its life what am I in for because of my mods? It is a 20 year old system which I am not ready to tear out and replace just yet. Not challenging your facts. Just wanting to know if I have done something dangerous. If all I have done is reduce its life and efficiency then that is acceptable.[/LEFT]

I will be installing a Mitsubishi 12K BTU AC in our master bedroom. Mini splits are new to me and I have a couple of questions - Can the outside unit be left out over winter or must it be disconnected and stored indoors? While looking at the list of recommended accessories and materials the manufacturer suggests a pre made mounting pad for the condenser unit. It mentioned that the pad should be mounted "above the snow line for your area" Is this correct? Does that mean that the condenser can't be on a ground level poured pad?