ITM4 Genesis

4-Inch HVAC Plenum Access Doors

Unique pan-in-pan design creates a solid, esthetically pleasing access door with optional modifications.
4-Inch HVAC Plenum Access Doors

DoorIcon_GPA2_175x200Genesis 4″ HVAC Plenum Access Doors are ideal for Modular Framing Systems or custom HVAC plenum wall panel construction air handlers The GPA4 series is available in both through metal design or with the ITM4 non-through-metal thermal break technology for higher thermal performance applications. Also choose between our in-swing and out-swing options for positive and negative pressure environments.

  • Extensively ETL tested
  • Meets UL 1995 safety standard compliance for heating and cooling equipment and NFPA 90
  • Stainless steel piano hinge
  • 20-gauge galvanized steel panels standard
  • Polyurethane foam insulation
  • One-piece Santoprene gasket, a UL recognized component

Certifications & Compliance



4-Inch HVAC Plenum Access Doors

technology_nonthermal2The non-thermal break  Genesis 4″ Access Doors deliver superior sealing with smooth edge surfaces and enhanced strength. Our non-thermal GPA4 products are manufactured with a stainless-steel hinge and closed end rivets increasing durability and leakage performance. The pan-in-pan through-metal panel design offers more value with the same high-performance components as our industry standard APEX family of products.


4-Inch HVAC Plenum Access Doors

technology_thermalThe 4″ Genesis Access Door with the ITM4 thermal break technology uses a non-through metal design with H-clip separation between two galvanized steel panels. This thermal break door is perfect for matching with 4″ non-through-metal plenum wall panels as well as in environments that demand less condensation, minimal heat loss and rigid safety requirements.



Wall Panel

Looking for
HVAC Wall Panels?

Genesis 4″ Plenum
Wall Panels

Complete your custom commercial HVAC air handling unit with 4-inch plenum wall and roof panels.


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Innovative technologies to advance the HVAC door
and air handler industry.

Polyurethane Foam
Genesis Access Doors include industry-approved polyurethane foam insulation for a superior seal, thermal characteristics and door rigidity to meet stringent Indoor Air Quality applications.
Custom Sizing
Custom Sizing
Our Genesis doors and plenum walls can be custom built to meet your specifications. We can create a custom sizing solution for any project.
Viewport Ready

ITM4 Viewports offer increased visibility and accessibility to any Genesis door. Our thermal break and non-thermal break viewports are easy to install or replace in the field. 

Latch Technology
ITM4 uses Ventlok and Allegis Latches to give you a custom fit while maintaining the tightest seal in the industry. Our engineering team will help you select the most appropriate latch for your project. 
Phone number

(763) 497-0842


Mon-Fri: 8am - 5pm CST