These items are most often missed and have the potential to compromise building performance and ability to obtain Passive House certification.
SAQ 1: Understanding Ventilation NecessityQuestion:
Is each room/space ventilated either directly or indirectly?
Answer: Every room within the thermal building envelope requires ventilation, directly or through transferred air. This includes spaces infrequently occupied, as long as implementing mechanical ventilation doesn't represent a disproportionate investment. Circulation areas like stairwells and corridors must also be ventilated, with exceptions for areas used rarely or where law prohibits. In spaces used exclusively for access, mechanical ventilation may be skipped if window ventilation is possible.See criteria for exemptions (https://passivehouse.com/downloads/03_building_criteria_en.pdf*Stay tuned:
SAQ 2: Ensuring Duct System Integrity:
Is the project planning on carrying out duct leakage testing?
Answer: For both multi-unit residential and non-residential projects, conducting duct leakage testing is essential. It's crucial to verify that there's less than a 10% imbalance between the HRV/ERV fresh air and exhaust air flow rates. This step ensures that our ventilation systems are efficient and effective, contributing to the overall energy performance of the building.
SAQ 3: Tackling DHW Circulation LossesQuestion:
Have DHW circulation losses been limited to a reasonable level in multi-unit buildings?
Answer: Targeting circulation losses between 40-60W per suite in multifamily residential buildings is vital. Managing these losses efficiently means we're reducing energy waste and ensuring that our hot water systems serve us effectively without compromising sustainability.
SAQ 4: The Deal with Elevator Pit InsulationQuestion:
If present, has the elevator pit been fully insulated (walls and floors)?
Answer: Insulating the elevator pit, including its walls and floors, is fundamental to preventing heat loss. It’s a critical step for enhancing the building's thermal efficiency, requiring attention in the PHPP - Passive House Planning Package to ensure a comprehensive approach to energy performance.
SAQ 5: Air Barrier AccountabilityQuestion:
Is the air barrier designed such that it can be tested while still exposed?
Answer: An accessible air barrier is key, allowing for leakage search and repair during blower door tests. This preparation is vital for identifying and fixing leaks promptly, ensuring the building's air tightness and overall energy efficiency.
SAQ 6: Window Criteria ConformityQuestion:
Do all windows meet the comfort and fRSi hygiene criteria?
Answer: Windows are crucial for ensuring indoor thermal comfort and hygiene, requiring supplemental heat for those not meeting the criteria to maintain satisfactory interior surface temperatures. However, exceptions apply, such as in areas where occupants spend minimal time, balancing energy efficiency with occupant comfort.See criteria for exemptions (https://passivehouse.com/downloads/03_building_criteria_en.pdf)
