And so Kohler's Black Friday sale likewise thinks big, offering discounts on life-changing bathroom and kitchen installations. Enter the promo code BFCM25, and you'll get 5 percent off bath and kitchen orders above $800, and 10 percent off orders bigger than $1,600. Depending on the size of the kitchen or bathroom renovation you're gifting yourself for the holiday season, this can add up to a discount of hundreds of dollars.