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Italtherm CITY CLASS 25 F 24 kW

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Universal wall-mounted gas boiler of Italian production, which can serve as an excellent solution for servicing an area of up to 192 m². The model is characterized by the presence of two independent circulation circuits, which allows providing both heating for the serviced area and hot water preparation. The heating power is adjustable in the range of 8.5-24 kW. The burner modulation capability allows the device to be configured for servicing a specific object, taking into account its volume and area, and the actual thermal insulation coefficient. The Italtherm CITY CLASS 25 F gas boiler is equipped with a copper heat exchanger in the heating circuit. A high-quality stainless steel plate heat exchanger is used for DHW operations. The design of the apparatus incl...udes a three-way valve and an 8-liter expansion tank. A highly reliable Grundfos three-speed pump is used as the circulation pump. The hydraulic unit is based on brass components. The piping of the circulation circuit is made using copper fittings. For enhanced convenience of use, the electronic control panel is equipped with an LED screen. The boiler uses a closed combustion chamber with a turbocharged air duct. An intelligent control system is responsible for temperature regulation. The model features a modern wall-mounted design.
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Italtherm CITY CLASS 25 F 24 kW
Energy source:gas
Mount:wall, dual-circuit
Boiler power:24 kW, area ~ 192 m²
Combustion chamber:closed, flue 60/100 mm
DHW temperature:from 35 °С, up to 55 °С

Universal wall-mounted gas boiler of Italian production, which can serve as an excellent solution for servicing an area of up to 192 m². The model is characterized by the presence of two independent circulation circuits, which allows providing both heating for the serviced area and hot water preparation. The heating power is adjustable in the range of 8.5-24 kW. The burner modulation capability allows the device to be configured for servicing a specific object, taking into account its volume and area, and the actual thermal insulation coefficient.

The Italtherm CITY CLASS 25 F gas boiler is equipped with a copper heat exchanger in the heating circuit. A high-quality stainless steel plate heat exchanger is used for DHW operations. The design of the apparatus includes a three-way valve and an 8-liter expansion tank. A highly reliable Grundfos three-speed pump is used as the circulation pump.

The hydraulic unit is based on brass components. The piping of the circulation circuit is made using copper fittings. For enhanced convenience of use, the electronic control panel is equipped with an LED screen. The boiler uses a closed combustion chamber with a turbocharged air duct. An intelligent control system is responsible for temperature regulation. The model features a modern wall-mounted design.

All specifications
Specifications CITY CLASS 25 F
Main
Energy sourcegas
Installationwall
Typedual-circuit (heating and DHW)
Heating area192 m²
Technical specs
Heat output24 kW
Min. heat output8.5 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)13.7 L/min
"Summer" mode
Heated floor mode
Circulation pump
Boiler specs
Efficiency93.3 %
Combustion chamberclosed (turbocharged)
Flue diameter60/100 mm / 80/80 for split flue /
Inlet gas pressure20 mbar
Max. gas consumption2.72 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
Weight30 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
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