Here's how to test your vent:
- Turn the stove burners off.
- Cut an eight-inch x eight-inch (approximately 20-cm x 20 cm) square of newspaper.
- Turn on the vent fan and hold the newspaper square over the vent filter.
- If the vent holds the newspaper in place, your vent hood is most likely working properly. If the paper falls, the hood filter may be clogged – or the ductwork to the outside may be too long, which can cause poor venting performance.