The Twin-Air™ compressor system has been designed to provide Grade-D breathing air to 3 workers wearing pressure demand respirators. The TA-3 has twin ASME receiver tanks that act as the mounting frame for the compressor. The use of the receiver tanks provides air that has been cooled to within 10 degrees of the ambient temperature. This plate becomes the frame for the addition of a reserve air cylinder on the model TA-3EA.