Isolate CAZ

Detail ID 5.0501.1
Topic
Combustion Safety
Subtopic
Combustion Appliance Zones
Desired Outcome

Combustion appliances unaffected by pressure changes in conditioned area Isolated room is outside the thermal and pressure boundary

SF Single Family Site-Built Housing
MH Manufactured Housing
MF Multifamily Housing

Specifications

  • SF
  • MH
  • MF
Specification Objective

Air Seal in accordance with SWS Subtopic "General Air Sealing"

Apply a continuous seal at all penetrations, gaps, cracks, etc. of the pressure boundary between the isolated room and conditioned space using sufficient pressure to push sealant into any gaps or cracks and contact any backing or infill material required

Establish new pressure boundary that is durable

  • SF
  • MH
  • MF
Specification Objective

Remove and seal register/grill openings of any return or supply ducting in the isolated room

Seal all ductwork existing inside the isolated room according to SWS detail for "Duct Sealing"

Insulate all ductwork existing inside the isolated room according to SWS detail "General Duct Insulation"

Sealed, insulated, and condensation free ducts that do not affect CAZ pressure

  • SF
  • MH
  • MF
Specification Objective

Insulate all plumbing pipes according to SWS detail for "Distribution Insulation"

Freeze-proof plumbing

  • SF
  • MH
  • MF
Specification Objective

Insulate all surfaces of the isolated room between the room and conditioned space to the applicable code minimum for the climate zone according to the IECC and applicable SWS

Continuous thermal boundary

  • SF
  • MH
  • MF
Specification Objective

Provide outdoor combustion air to the isolated room according to SWS detail for "Combustion Air-Fuel-Fired Appliances"

Appliances have sufficient combustion air

View Sub-Topic:
Combustion Appliance Zones