Ariston Fast Evo 11C

Advantages: 1. After installation of the column and the obligatory setting by a specialist in the taps there is always hot water. Nothing to do with the column. She ignites and extinguishes herself. Batteries do not need to be changed - the electronics are powered from the network. I rarely approach the column, only if for some reason water of a different temperature was required.
2. No need to regulate the flow of gas and water to obtain the desired temperature. This column does not display thermometer readings, but a user-defined desired water temperature. I set the required temperature on the display with the buttons, and the automation itself selects the required gas supply. If I wash in the shower, and someone opened the faucet in the kitchen, or flushed the toilet, or for some other reason, the pressure or flow rate or gas pressure changed, then there is no need to run to the column and adjust something there. You just have to wait a bit - the automation itself will select such a flame power so that the water temperature returns to the value previously set on the display.
3. The column works reliably even with very low water pressure.
4. A properly tuned speaker is very quiet.

Disadvantages: 1. The temperature of the water does not stabilize instantaneously, but fluctuates for some time, sometimes above, then below a predetermined value. This drawback will have to get used to. If the column is set up correctly, the oscillations quickly fade out and the temperature is maintained with high accuracy.
2. Powering the electronics from the network eliminates the need to change batteries, but requires an electrical outlet near the speaker. Without electricity, the column does not work.

Comment: In order to preserve the guarantee, the start-up of the column should be carried out by an authorized service center specialist Ariston. For the column to work properly, it must configure and write four parameters into the memory of the control unit:
1. Type of gas used.
2. Maximum power (so as not to overheat the radiator).
3. Minimum power (at which the burner stably burns and does not go out).
4. Power smooth ignition (such that the gas ignited reliably, but smoothly - without cotton).
The manual says how to properly adjust these parameters by monitoring the pressure at the outlet of the gas valve with a pressure gauge.
A certified "specialist" came to me without a manometer, who had never seen such a column or instruction on how to set it up before. Therefore, after the commissioning notes appeared in the warranty documents, I had to set up the settings myself.
It wasn’t so fast to adjust without a manometer, but the result is good. Who are interested in the details with specific figures, see them in the discussion:
https://market.yandex.ru/product/10728121/forum?hid=90575&comment=child-7-2020532

Advantages: Famous brand, sleek design, network connection (no need to change batteries).

Disadvantages: The display does not reflect the actual temperature. Very noisy. Requires customization. Price.

Comment: The most important thing! This unit requires a gas setting.So do not try to install it yourself. Call the master of warranty, they usually have access to install gas equipment. Gas adjustment is required to set the temperature, otherwise the column will not work correctly. Plus, it should be under warranty, so all actions should be performed by specialists.