It’s generally recommended to seal any ceiling-mounted spotlights or downlights before installing a positive input ventilation (PIV) system, as these types of lights can potentially allow air to leak into the roof space or attic.

Hi Ravi… That is a good question.

In order for a Positive Input Ventilation (PIV) system to work effectively throughout a house, it is generally recommended to keep internal doors open to allow for adequate air flow (unless they have air vents). This will help to ensure that the air is able to circulate and that the PIV system can distribute fresh, filtered air throughout the house.