https://marshield.com/rf-waveguide-air-vents/
RF Waveguide Air Vents | MarShield Custom Radiation Products
Dec 23, 2019 - RF Waveguide Air Vents. All HVAC access points into the RF shielded enclosure will be treated with a hex cell honeycomb waveguide vent assembly.
rf waveguide air ventscustomradiationproducts