That is, per hour 1.5 kwh.
Arch spans are large or small (3.5M- 15M), which can be blown on both sides or on one side. The power of an arch about 8 meters is generally above 750W, which depends on the size and obsolescence of the arch, whether there are holes, and the high power is better than the low power, so it will be full and strong and not easy to fall out. It is better to use two than one, so that one stops and the other can be maintained. Or there should be one as a backup. Arch is generally forbidden in festive occasions, so it is very important to be prepared.