Genesis 4″ Commercial HVAC Access Doors

4 Inch HVAC Plenum Access Doors

Improve commercial air handler reliability and performance with our rigid 4″ Genesis HVAC Access Doors. Our heavy duty GPA4 access doors are ideal for custom rooftop HVAC units serving critical environments requiring high thermal performance and safety standards. Choose between through metal or non-through-metal designs and in-swing or out-swing options for positive and negative pressure environments. The Santoprene gasket provides optimal sealing and advanced thermal stability. It is extensively ETL tested and meets UL 1995 safety standard compliance for heating and cooling equipment and NFPA 90.

  • ETL tested‚ UL 1995
  • Stainless steel continuous hinge
  • 20 gauge galvanized steel panels standard
  • Polyurethane foam insulation
  • One piece Santoprene gasket, a UL recognized component


Certifications & Compliance

4 Inch Non-Thermal HVAC Plenum Access Door

The non-thermal break 4″ Genesis 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 Thermal Break HVAC Plenum Access Door

The 4″ Genesis Access Door with ITM4's 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.


Product Image GPA Doors


Polyurethane Foam

The 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 for today and into the future. Learn more about our Polyurethane Foam.

Latch TechnologyVentlok and Allegis Latches

At ITM4 we use Ventlok and Allegis Latches to give you the custom fit you need while maintaining the tightest seal in the industry. Our engineering team will help you select the most appropriate latch for your project. Learn more about our Latch Solutions.

Viewport Apex TechnologyViewport Ready

Our Viewports offer increased visibility and accessibility to any Apex door. Designed to fit existing Apex products or custom products our thermal break and non thermal break viewports are easy to install or replace in the field. Learn more about Viewports.

Modular Framing Systems

Our Genesis HVAC Access doors are available in a variety of thicknesses to suit your custom modular air handling unit design. Contact us directly or become a Member to learn more about our custom options.

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. Contact us directly or become a Member to learn more about our custom options.

Print this page Email this page Back to top

Looking for HVAC Wall Panels?

4″ Genesis Plenum Wall Panels

Complete your custom or modular-frame commercial HVAC unit with 4 inch plenum wall and roof panels.

> View this product


Forgot your password?