How long is the warranty period, and what are the conditions?

3 years if installed by a certified official BIG serviceman.

Do the water heaters work with LPG bottles/cylinders?

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).

Which models are more appropriate for use in small shops?

The B3108 or B3110 with 8 Litre and 10 Litre per minute hot water capacity.

How can an appropriate model be chosen before purchase?

By contacting BIG’s contact center (Iran) at 021-51011

Do low water pressure models work with high water pressure?

Yes.

Can low water pressure models be use in areas without city water piping?

Yes, but requires the water reserve/storage to be at least 2 meters higher than the water heater.

What is the best solution in order to reduce build-up?

Use of Ionized models, using the water heater on low power and using filters on the cold water inlet.

How often do the water heater pipes need to be cleaned from build-up?

This depends on the water composition, however generally for standing pilot models once every two years and for Ionized models once every four years.