This must be charged. First of all, this is not the first installation after purchase, but it is moved after installation, which is not within the free service scope of the gas company. Just like me, buying an air conditioner and installing it is free, but there is a charge for moving later. As for the price, a place may have a standard. If you think the price is good, you can contact the merchants selling wall-hung boilers. They should also have installers there, and the price may be more reasonable.