Yes without active cooling.
Front and back is open right now , but i plan add a door in the front with holes for ventilation.
CPU is at 38-40°C when idle and 45-50°C under Load. CPU fan is a Noctua NH-L9x65. Fan speed is is mostly at 50%
Drive temps are at 28-33°C for the HDD's in the hotswap-bays and 35-45° for the nvme ssds