Access Doors
& Panels
Access Doors Training
Application
Access doors and panels provide direct access to
equipment located inside HVAC ducts and
enclosures or behind walls and ceilings.
Basic Types
• Duct Access
• Equipment or Plenum Access
• Architectural Panel
• Fire Rated
Access Doors Training
Duct Access
Duct access doors are required by building codes
as follows:
HVAC Duct Access Doors
Service and inspection of fire, smoke, and
fire-smoke dampers.
Grease Duct Access Doors
Cleaning and inspecting grease ducts.
Access Doors Training
HVAC Duct Access Doors
Duct configuration is the primary criteria.
• Square/rectangular
• Round/oval
Other Consideration
• Hinged
Convenient and most common
• Removable - Cams
Space constraints
Sandwich-type vs. Cam-type
• Externally insulated duct
DMR – Round
Duct
HAD - Hinged
Access Doors Training
Grease Duct Access Doors
Application
• Kitchen Hood Exhaust
Basic Construction
• 2300° F Rating
• Black Iron Interior Panel
• Meets NFPA-96: Ventilation
Control and Fire Protection
of Commercial Cooking Operations
DMHT – Grease Duct
Access Door
Access Doors Training
Equipment and Plenum
Access Doors
Typical Selection Criteria
• Fan Discharge  Positive Pressure  Open-In
• Fan Intake  Negative Pressure  Walk-In
Primary Applications
• Built-Up Air Handler
• Custom Air Handler
OAD – Open-In
WAD – Walk-In
Access Doors Training
Architectural Access Panels
Architectural access panels commonly provide
access to plumbing fixtures behind walls and
general access to concealed ceiling space.
Basic Designs
• Flush Mount - Exposed Flange
• Drywall Bead - Concealed Flange
• Plaster Frame - Recessed Flange
Flush Mount - TM
Drywall Bead - WB
Access Doors Training
Fire Rated Panel
Provides access to plumbing fixtures behind fire
rated walls and general access to concealed
spaces above fire rated ceilings.
Basic Features
• Self Closing
• UL Rated for 2 Hour
Rated Walls
• UL and WHI Rated for up to 3 Hour
Rated Ceilings
• Grey powder coat finish
Fire Rated - FD
Access Doors Training
THANK YOU!