All model have Energy Rating labels. Pilot models have an energy rating of D, and ionized models have an energy rating of C which are the highest energy rating of any water heater available in Iran.
3 years if installed by a certified official BIG serviceman.
Yes. Ensure that at the time of purchase the LPG version is chosen, or by requesting an LPG conversion kit from your certified BIG servicemen (at customers cost).
All BIG Ionized models.
The B3108 or B3110 with 8 Litre and 10 Litre per minute hot water capacity.
By contacting BIG’s contact center (Iran) at 021-51011
Use of Ionized models, using the water heater on low power and using filters on the cold water inlet.
Yes, Ionized models should be used.
This depends on the water composition, however generally for standing pilot models once every two years and for Ionized models once every four years.