30? My dining room has 5 bay windows, my basement 3, my attic 3, bedrooms 8, bathrooms 2, stairway 1, kitchen 2, closets 2 (don’t ask), living room 3, then there is the unfinished part of the basement with 1. 100 year old leaded glass windows, they’re actually very pretty and the glass in good condition, energy efficient not so much.