Question

آبگرمکن رو بذار رو درجه 5

Comments

بنا به نظر یک Native ساکن کانادا

Turn the knob(up) to 5

or according to a British :

Turn the water heater up (to 4)

Answer 1

Set the water heater to 5 degrees.

Answer 2

Set the thermostat (on the water heater) to 5.

http://energy.gov/energysaver/tips-water-heating

Turn up/down the thermostat to 5.

http://www.houselogic.com/home-advice/water-heaters/water-heater-energy-saving-tips/