The **SunTube35 side wall** extends the wall‑transfer concept with a larger diameter for higher illuminance. A crystal glass dome harvests light at the façade, feeding a rigid, ultra‑reflective tube that carries daylight sideways through the wall to an easy‑click diffuser inside. The insulated wall box maintains airtightness and helps the system meet demanding energy goals; add the EcoPower element for double or triple‑glazed thermal performance when needed. Installation remains clean and predictable, and the module integrates with SunTube pitched or flat‑roof collectors, elbows and extensions to navigate complex layouts. Choose **SunTube35 side wall** when you want genuine daylight in interior rooms without altering roof lines—bigger aperture, brighter feel, and the calm quality of natural light.