What is the typical diameter of the inlet and outlet of a heater? How is it calculated?

There are generally three kinds of caliber of the heater: 4 points, 6 points, 1 inch. Commonly used caliber is 6 points (inner diameter 20mm), special 4 points (15mm) or 1 inch (25mm).

South is not cold is generally 4 points Beijing side is 6 points Northeast side of the cold with 1 inch more

In fact, the size of the caliber and the amount of heat dissipation is not related to the main is related to the pipeline interface with your family That is, your family's pipeline interface is 6 points you can not be 4 minutes and 1 inch it

Generally small interface of the flow of small some districts are based on the flow of the calculation, so the province of heating costs. I don't know what to say, but I'm not sure if I'm going to be able to pay for the heating.