Proportion of design cost of water heating external network

The proportion of design cost of water heating external network is as follows:

The design fee is charged according to the project investment. The investment in a relatively perfect residential community is about 40,000-80,000 yuan/mu, with the multi-storey community lower and the high-rise community higher. In this way, there is a total investment. The charging ratio of outdoor projects is usually higher than that of single buildings.