Renner compressed-air receivers store the air produced by a compressor and release it on demand, compensating for fluctuating consumption and reducing the compressor's on/off cycles during short peak loads, thereby lowering operating costs. Depending on need and available space, vertical and horizontal receivers are available with volumes of 90–10,000 litres and a maximum pressure of 11 or 16 bar. The tanks are hot-dip galvanized with a 10-year anti-rust warranty and comply with AD2000 safety directives. From 250 litres upward they include an inspection port for quick visual checks.