Glossary
Apex: The highest point, at the top, the culmination.
Astragal: Flat vertical trim molding attached to one twin door leaf that other door leaf closes against.
Galvannealed: Sheet steel that is heat treated after coating to produce a zinc-iron alloy and eliminated the spangle. Can be painted without further surface preparation except for normal cleaning.
Density: How tightly compacted a material is, ratio of mass of an object to its volume. Typically expressed in pounds and the high the number the more rigid.
Door Frames: Mounting frame and door panel frame are 6063-T5 extruded aluminum.
Door Size: Measured from outer most part of mounting frame, excluding mounting Flange, (part of frame that slides into the wall) sized 1/4″ under wall opening.
Embossed Aluminum: Aluminum sheet metal with a stucco pattern and a rough finish on both sides.
Galvanized: Zinc coating on cold rolled sheet steel, applied through a “hot dipped” process that produces a spangle pattern or an “electrolytic process producing light gray finish without spangle.
Hinge Location: Door swing is reference by (L/H) left hand or (R/H) right hand which is the location of the hinge when viewing either an in-swing or out-swing door from the exterior side.
In Opening or In-swing: Door opens into positive pressure “Blow Through” plenum. P = Positive.
‘K’ Factor: A rate at which heat flows through material, the lower the number the better the insulation value. The thickness of insulation divided by ‘K’ = the ‘R’ factor.
Out Opening or Out-swing: Door opens out to exterior on negative pressure “Draw Through” plenum.
N: Negative.
PA: Plenum Access.
‘R’ Factor: A measure of the resistance of heat flow. As the thickness of an insulation increases the ‘R’ factor increases, the higher the better the insulation value.
Removable Mullion: Vertical frame member that divides the twin door mounting frame in half, and provides a gasket seal for the two door leafs to latch and seal against. The mullion is removable to allow full access through the door opening.
Spangle: Bright sparkle finish with snowflake like pattern that gliders, is present on Hot Dipped Galvanized sheet steel.
Twin Door: Two independent door leafs hinged along the left and right jambs in one common mounting frame.
Who Uses Our Products?
ITM4 products are in commercial HVAC units around the world. Our APEX Plus and Genesis products are regularly used in medical facilities, government buildings, high tech clean rooms, laboratories, schools, malls and high rises.
