Skyflow SSR Horizontal Roof Cowl The Skyflow SSR is a horizontal roof cowl designed for commercial and industrial roof terminations where you want dependable weather protection with a tidy discharge. It is UV stabilised with a maintenance free GRP cowl and a Goose Wing Grey finish, making it well suited to exposed rooftop environments. Select models are available for next day delivery. Why Skyflow SSR is a strong roof termination option UV stabilised: built for long term external exposure Maintenance free cowl: simple ongoing upkeep with periodic inspection Roof pitch capability: suitable for flat roofs plus inclined roofs up to 30° Finish: Goose Wing Grey paint finish (BS 00-A-05) Optional protection: bird guard option plus bird guard with backdraught shutters option Options and product coding Choose the base model size first, then select the option level to match the site requirement. Base model Standard With bird guard With bird guard + shutters SSR25 SSR25 SSR25B SSR25BS SSR31/35 SSR31/35 SSR31/35B SSR31/35BS SSR40/45 SSR40/45 SSR40/45B SSR40/45BS SSR50/56 SSR50/56 SSR50/56B SSR50/56BS SSR63/71 SSR63/71 SSR63/71B SSR63/71BS SSR80 SSR80 SSR80B SSR80BS System design note: pressure loss Roof cowls introduce an additional pressure loss. Use the cowl pressure drop curve to determine the pressure loss at your required flow rate, then add that value to the system design pressure and confirm the fan selection can accommodate the extra resistance. Installation overview Mounting: the cowl must be securely mounted to suit the application Roof pitch: installation guidance states mounting on flat or inclined roofs up to a maximum pitch angle of 35° Mounting methods: curb mounting plus purlin mounting are covered in the installation guidance Backdraught shutters: available factory fitted, retrofit procedure is also provided Operating environment and maintenance Ambient limits: -20°C to +70°C fixed speed, -20°C to +50°C with a speed controller, up to 95% relative humidity Use limitation: not suitable for corrosive or explosive atmospheres Maintenance: inspect at least every 12 months, clean with a non abrasive cleaner, check fastenings for tightness Product Data, Performance & Dimension Sheet Model options for SSR25 through SSR80, pressure drop curve guidance, bird guard and shutter option codes plus full dimensional data for curb mounting and purlin mounting layouts. Click here to download the product data, performance and dimension sheet. Click here to download the full data, performance and dimension sheet. Installation, Maintenance & User Guide Installation sequence for mounting, curb fixing and purlin fixing, retrofit steps for backdraught shutters plus maintenance guidance including annual inspection, cleaning and fastening checks. Click here to download the installation, maintenance and user guide. Click here to download the full installation, maintenance and user guide. Looking to specify or purchase? Explore our full range of heat recovery ventilation units or contact Buy Ventilation for expert guidance on selecting the right system for your project.