Involves 3 interactive strategies:

• Preventing uncontrolled air leakage through the building envelope
• Providing for fresh-air supply and the exhaust of stale air
• Providing draft and combustion air for fuel-burning appliances

CAUTION

ALL 3 STRATEGIES INTERACT AND MUST
BE IMPLEMENTED TOGETHER FOR
HEALTH AND SAFETY REASONS.

The important point to stress is that these 3 strategies MUST ALWAYS be carried out as if they were a single strategy. Otherwise, conditions can be created within the house that could impact upon the homeowner's health and safety as well as the structural integrity of the building.