Consideration for obstructions in routing and associated work required shall be considered.
Vertical duct and pipes shall be routed through the interior of the building.
- In the event that interior routing is not feasible (based on all other options explored and demonstrated to CPS), the recommended location on the exterior shall be reviewed with CPS prior proceeding with the first milestone review set.
- Exterior ductwork routing is a last resort solution for renovation projects and shall not be used on new construction. If approved by CPS, a mock up shall be provided for EOR/CPS approval as part of the project to ensure a quality long term installation. Utilize round duct over rectangular where possible for tighter duct sealing, longer life, less wind/snow load and to discourage people from trying to walk on it. Ductwork shall be sloped such that any seepage into the ductwork is easily drained. Ductwork slope or extra tapered insulation shall be provided on the upper surface beyond code minimum R-value such that water/snow shall not accumulate on top of the duct or at seams/flanges. Outer duct shall be stainless steel. Bottom of ductwork shall be a minimum of 24” clear from the surface of the roof for future roof repair. Route ductwork/piping so both sides of duct/piping and other items on the roof are accessible without the need to crawl under or climb over ducts/pipes. Roof stairs / bridges may be required. Coordinate with other trades.
Exterior shafts must be designed to conform to CPS exterior wall standards. Any requested deviations from CPS guidelines shall be submitted for approval.
Where existing piping / ductwork is reused, replace all damaged / missing insulation. Provide new labels and directional arrows when identification is missing or damaged.
Horizontal duct and pipe routing shall be located above existing ceilings and in attics whenever feasible. In no case shall conduit or pipes be exposed within finished/occupied spaces.