Of course yes, although it is not true that all the furniture in the room must be made of flame-retardant board. The main aspect is whether or not they are permanently attached to the ground or walls, and consequently how they are mounted. In the history of our implementations, the fire department’s interpretation of the regulations has always been in accordance with the law cited in our blog, which attests to flame-retardant, properly installed furniture in rooms, and does not require it. But for your own safety, I advise you to check the past decisions of the fire department in your region, because it is the firefighter’s decision that is always binding.