These two jobs are on the same roof,  4 HVAC units were bid out at the same time, we won the bid on 2 units, the"other guy" won with a much lower price Our work on the left column,                      The  "other guy"  on the right column	The "other guy "  Ducts are not straight, dip down then go back up, most "critical" duct is too small for area served.  Notice the mixture of 4 x 4 redwood & rubber blocks for duct support ??
Custom Fabricated duct built for proper air flow and eliminate turbulence in the duct	Duct designed with too much turbulence, inadequate air flow to critical areas the longest duct( above picture)  should be on bottom coming straight out of fitting not on top as shown
Front View of Unit # 2.  NOTE the " other guys " job in the background	Most of the duct was not sealed as required. these ducts are internally lined with compressed fiberglass which will soak up rain or other moisture ( this home is literally on the beach ) as it penetrates the unsealed joints, potentially causing a mold / fungus issue
Custom fabricated square duct on unit # 2 with vibration eliminator & zone damper motors.  NOTE the "other guys" unit in the back ground	extremly light coating of duct sealant over duct tape,  code requires metal to be screwed together then sealed
We Installed a 1&1/2 ton cooling system for the controls closet of this "smart" house, we have 5 HEAT / AC zones with two roof units. Remote temperature sensors in each zone, HVAC thermostats (on left) in closet out of view.	This duct should be level & secure. this fitting has an appoxiamately 120 degree turn radius, Proper duct design per ASHRAE ( a professional HVAC engineering association) calls for no more than 90 degrees in any one turn. Also note that this duct is +/- 9 to 10 feet in length There is no support on this duct Building & Mechanical codes requires support at minimum of every 4 ft, and within 1 ft of every elbow.
	too many bends / turns in duct, excessive turbulence will cause improper air flow. Don't Let This Happen To You By Taking The Lowest Price !!!!