What potential issue can arise from negative pressures in the home?

Negative pressures in the home can lead to air being drawn into the house from outside sources, including potentially hazardous areas like crawl spaces, basements, or garages. When a home experiences negative pressure, it creates a situation where air flow is drawn inward, which can bring in not only outside air but also any pollutants or harmful gases present in those areas.

For instance, if there is a gas appliance in the basement and negative pressure is present, it might pull in gases such as carbon monoxide, which is harmful if inhaled. This adds a significant safety concern, as it increases the risk of exposure to toxic substances, compromising indoor air quality and occupant health.

Therefore, understanding the impact of negative pressure is essential for maintaining safe and healthy indoor environments, making the correct response clear in recognizing the dangers associated with these pressure changes.