featuring an Open Air Over (OAO) design that utilizes system airflow to maintain optimal operating temperatures under continuous duty

While it is an HVAC 24V coil

wall furnaces

System Protection: Integrated stainless steel strainer prevents sediment from damaging sensitive fixtures and downstream equipment

and 90UGF units

Armstrong International GD-30-3/4-7/60 Regulator 318172-701 featuring an Open Air OverThe Armstrong International GD 30 3 4 7 60 Regulator is an industry standard direct acting pressure reducing valve designed for precision control in low to moderate flow applications. Specifically engineered for steam, air, and non corrosive gases, this 3 4 inch pressure regulator features a durable ASTM B584 bronze body capable of handling a maximum allowable pressure of 250 PSIG. This specific configuration provides a reliable reduced pressure range