6.6207.1 Passive Ventilation (All Building Types)

Topic: 
Whole Building Ventilation
Subtopic: 
Passive Ventilation
Desired Outcome: 
Passive ventilation system installed to provide effective and efficient ventilation
For supporting material, see Referenced Standards.
TitleSpecification(s)Objective(s)
6.6207.1a
Pre-inspection

Specifications will be field verified as appropriate to site conditions by installer (e.g., presence of operating exhaust system, specified location, and type of trickle vent specifications)

Access to all affected dwelling units will be ensured by installer

Ensure appropriate design for installation

6.6207.1b
Intake location

Intake will be installed in accordance with the following:

  • A minimum of 6" above grade
  • A minimum of 6' from exhaust outlets and will meet specifications of ASHRAE ASHRAE American Society of Heating, Refrigerating and Air-Conditioning Engineers, www.ashrae.org 62.1 Table 5-1 for all other contaminant sources
  • Above local snow or flood line
  • A minimum of 18" above an asphalt based roof

Ensure occupant health and safety

Prevent entry of contaminants

Ensure unrestricted air flow

6.6207.1c
Equipment selection

A system that provides a proper amount of air flow in accordance with ASHRAE ASHRAE American Society of Heating, Refrigerating and Air-Conditioning Engineers, www.ashrae.org 62.2 will be selected that minimizes potential occupant discomfort and/or drafts

Ensure proper equipment

Ensure conditions for thermal comfort

6.6207.1d
Material selection

Sealants and materials will be compatible with their intended surfaces and applied in accordance with manufacturer specifications

Sealants and materials will be continuous and meet fire barrier specifications

Ensure sealants and materials meet or exceed the performance characteristics required of the assembly (e.g., fire rating)

6.6207.1e
Installation

Install in accordance with manufacturer specifications

Inlet will be sealed to prevent water intrusion and air leakage into building cavities

Prevent entry of weather and pests into building shell

Ensure occupant health and safety

6.6207.1f
Verification

Verification of the passive inlet device will be performed and documented

Air will flow through the device in the correct direction

Ventilation system operation will be tested to confirm it is not causing pressure imbalances

Room-to-room pressure differential within the dwelling unit will be no greater than 3 pascals

Ensure the performance of the ventilation system

Ensure occupant health and safety

6.6207.1g
Occupant/property manager education

Occupant/property manager will be educated on how the system works, and its purpose and value

Occupant/property manager will be educated on how to inspect passive intake device upon unit turnover

Ensure the durability of the ventilation system