They say 1.8 meters in general, the need for 2.1 meters, there are few local.. The 2.1 meters will not be good?
In the same light conditions, 2.1 of the hot water to be generated, the water temperature to be high, but the versatility of the 2.1 poor, maintenance costs to be higher than the 1.8 meters,
Manufacturers are generally in order to meet the market demand and production, increase the length, that is, increasing the heat collection area,
Solar vacuum collector tube, now the national standard of 1.8 meters, versatility is good, that is, convenient maintenance, the length of 2.1 meters
Solar tube is not the longer the better, after the actual use of the process found that 1. 8 meters is the most efficient.
