Jeremyt
Member
Hello all. Its been a while.. I have finally decided to just tackle the HVAC design, fabrication and install on my own. Once I get past the design stage, I feel confident in making up all the ductwork, as well as getting the equipment installed and running. Currently I am designing a duct system for the second floor, which is two bedrooms, a bath and a hallway along with the stairs back down. I am planning on running a Mitsubishi SEZ-KD12NA4R1 for this area. It will be in the attic, along with associated ductwork coming down through the ceiling. This is one of three air handlers that will be installed. I started playing with the ACCA Manual D speed sheets last night and my Total Effective Length is an absurd amount. I was close to 400 feet I think? Obviously I am doing something wrong here. I have attached a screenshot, with blue being supply, and red being return air. Any advice and wisdom to share. Im sure I am just being dumb. Thank you all in advance..