ENERGY STAR ® QUALIFIED HOMES HVAC SYSTEM QUALITY INSTALLATION RATER CHECKLIST SECTION 2. DUCT QUALITY INSTALLATION- Applies to All Heating, Cooling,
{"Image DocumentName": "SECTION 2. DUCT QUALITY INSTALLATION", "Image ImageDescription": "SECTION 2. DUCT QUALITY INSTALLATION - Applies to All Heating, Cooling, Ventilation, Exhaust, and Pressure Balancing Ducts. 2.1 Connections and routing of ductwork completed without kinks or sharp bends No excessive coiled or looped flexible ductwork Flexible ducts in unconditioned space not installed in cavities smaller than outer duct diameter; in conditioned space not installed in cavities smaller than inner duct diameter 2.4 Flexible ducts supported at intervals as recommended by mfr. but at a distance < 5 ft. Critical Point: Flexible ducts should be supported by some method (nylon straps, wire, bottom chord of open web truss, etc.) at least every 48 . The ducts should not bend or turn sharper than 90 degrees at any section in the run. DROP WIRE AS A SUPPORT SYSTEM> Summary: Every bend and curve in a flex duct restricts air movement and decreases air flow velocity. Regular support and gentle bends allow ducts to achieve manufacturer specified performance.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}