Catalog   /   Climate, Heating, Water Heating   /   Heating & Boilers   /   Boilers   /   Italtherm

Italtherm CITY CLASS 20 F 19.5 kW

Photos - Boiler Italtherm CITY CLASS 20 F 19.5 kW
Outdated Product
A reliable and efficient gas boiler from the Italian company Italtherm, which can be a good choice for heating a room up to 156 m². This is a combined two-circuit model that allows you to organize the work of both heating and hot water. The device uses a closed combustion chamber and a heater with the possibility of flame modulation. Automatic temperature control and the ability to fine-tune the heating allow the model to be connected to both radiator batteries and underfloor heating. The Italtherm CITY CLASS 20 F gas boiler is assembled from the highest quality components. A copper heat exchanger and a brass hydraulic group ensure an extremely long service life of the heating system. The auxiliary heat exchange circuit that serves the hot water supply is built on the basis of no less reli...able and durable stainless steel. The design includes a circulation pump. There is also an expansion tank. Summer mode option available. The electronic control system makes the heating setting as simple and accurate as possible. This model combines maximum efficiency and maximum economy. The boiler is mounted on a wall suspension. The heating system can be powered both from a gas pipeline and an autonomous cylinder with liquefied gas.
add to listmy lists
Italtherm CITY CLASS 20 F 19.5 kW
Energy source:gas
Mount:wall, dual-circuit
Boiler power:19.5 kW, area ~ 156 m²
Combustion chamber:closed, flue 60/100 mm
DHW temperature:from 35 °С, up to 55 °С

A reliable and efficient gas boiler from the Italian company Italtherm, which can be a good choice for heating a room up to 156 m². This is a combined two-circuit model that allows you to organize the work of both heating and hot water. The device uses a closed combustion chamber and a heater with the possibility of flame modulation. Automatic temperature control and the ability to fine-tune the heating allow the model to be connected to both radiator batteries and underfloor heating.

The Italtherm CITY CLASS 20 F gas boiler is assembled from the highest quality components. A copper heat exchanger and a brass hydraulic group ensure an extremely long service life of the heating system. The auxiliary heat exchange circuit that serves the hot water supply is built on the basis of no less reliable and durable stainless steel. The design includes a circulation pump. There is also an expansion tank. Summer mode option available. The electronic control system makes the heating setting as simple and accurate as possible. This model combines maximum efficiency and maximum economy. The boiler is mounted on a wall suspension. The heating system can be powered both from a gas pipeline and an autonomous cylinder with liquefied gas.

All specifications
Specifications CITY CLASS 20 F
Main
Energy sourcegas
Installationwall
Typedual-circuit (heating and DHW)
Heating area156 m²
Technical specs
Heat output19.5 kW
Min. heat output8.1 kW
Power supply230 В
Power consumption103 W
Coolant min. T35 °С
Coolant max. T80 °С
Heating circuit max. pressure3 bar
DHW circuit max. pressure6 bar
Consumer specs
DHW min. T35 °С
DHW max. T55 °С
Performance (ΔT=25°C)11.2 L/min
"Summer" mode
Heated floor mode
Circulation pump
Boiler specs
Efficiency92.7 %
Combustion chamberclosed (turbocharged)
Flue diameter60/100 mm / 80/80 for split flue /
Inlet gas pressure20 mbar
Max. gas consumption2.22 m³/h
Expansion vessel capacity8 L
Expansion vessel pressure1 bar
Connections
Mains water intake1/2"
DHW flow1/2"
Gas supply1/2"
Central heating flow3/4"
Central heating return3/4"
Safety
Safety systemsgas pressure drop
water overheating
flame loss
draft control
water circulation failure
frost protection
More specs
Dimensions (HxWxD)727x400x300 mm
Weight27.8 kg
Official Websiteen.italtherm.it
Added to E-CatalogAugust 2017
The information in the model description is for reference purposes.
Always clarify the specifications and configuration of the product with the online store manager before purchasing.
Catalog Italtherm 2026 - new arrivals, bestsellers, and the most relevant models Italtherm.
Model overview based on user reviews  
The Italtherm CITY CLASS 20 F 19.5 kW gas boiler is a wall-mounted, dual-circuit unit designed for both heating and hot water supply, suitable for areas up to 156 m². It features a closed combustion chamber and a heat output of 19.5 kW, with a high efficiency of 92.7%. Users appreciate the quality components such as the copper heat exchanger and brass hydraulic group, which ensure durability and reliability. The boiler is described as easy to maintain with convenient digital settings, allowing customization of heating intervals. However, some users report that the boiler can be noisy and may require adjustments to reduce frequent cycling. Despite these minor drawbacks, the Italtherm CITY CLASS 20 F is considered a simple and reliable choice for efficient home heating and water heating needs.
Pros

Cons

normal model, nothing special
28 April 2019 
All parts are copper or brass
It works very noisily, vibration is felt.. Replaced the air fan, noise and vibration decreased slightly
just bought Italtherm CITY CLASS 25 F  i recommend it don't buy
The boiler is simple and reliable. I recommend
15 December 2021 
Copper heat exchanger, brass hydraulic group, easy to maintain, all components are of high quality, European. Convenient settings, digital knobs, not mechanics as some reviews say. All intervals can be set in those menus, if it turns on often, depending on the volume and length of the coolant, you can set the heating operation delay as you like. Water heating is good, smooth, there are no temperature changes, enough for 2 points.
A little noisy. With factory settings, the heating turns on (clocks) every minute.
use Italtherm CITY CLASS 25 F few months
Terrible device
30 September 2021 
You won’t sleep with him, or you’ll get used to such a stupid mode of operation
Mechanical twisters
Loud, minimum temperature lights up and turns off every 2 minutes
use Italtherm CITY CLASS 25 F more than year
Add Review