1. Initial installation of gas pipeline of water heater (within 4m, calculated as 50 yuan for each meter exceeding), and the reference cost is 280 yuan.
2. Renovation of air duct of water heater (within 2m, above 1 m, it is calculated by 50 yuan), and the reference cost is 220 yuan.
3. The roommate moves the table (within 2 meters, more than every meter is calculated by 50 yuan), and the reference fee is 240 yuan.
4. The table is moved to the balcony, and the reference fee is 220 yuan.
5. Reconstruction of pipeline in the same room (within 1 meter, if it exceeds one meter, it shall be calculated as 50 yuan), and the reference cost is 160 yuan.
6. When the stove is moved to the balcony (within 1 meter, if it exceeds one meter, it will be calculated as 50 yuan), and the reference fee will be 200 yuan.
7. An embedded metal hose (within 4m, above 1 m is calculated by 50 yuan), and the reference cost is 423 yuan.
8. Perforation: brick wall, reference cost 50 yuan; Perforation: cement wall, reference cost 60 yuan.
The above information is for reference only, please consult your local gas company for details.