We contacted this company to help install ventilation in a 3-room apartment. It was necessary to make 4 exits - 2 for the bathroom, a bathroom and a kitchen. It was refused because the amount of work is too small!
P.S. When we buy a large house, we are unlikely to contact you anymore...
I talked with managers Anastasia and Vladislav, everyone has their own prices, you ask a question about an inverter air conditioner and each manager has his own answer