Homeowner checklistBlower-door testing: what −50 Pa and ACH50 mean
Use these steps to plan, check and keep a record of your next actions.
Home / equipment: __________________Date: __________________
- Record the reason for testing and the rooms or symptoms of concern.
- Confirm the test boundary, enclosed volume, protocol and opening configuration.
- Ask the assessor to explain −50 Pa, CFM50 and ACH50 with their units.
- Distinguish the approximate wind analogy from real wind and everyday ventilation.
- Request diagnosed leak locations, before-and-after results and ventilation/combustion checks.