The Reventon S1-3S water heater offers a rated thermal output of 14.7 kW (3 speeds) / 13.1 kW (2 speeds) / 11.3 kW (1 speed), a maximum air flow of 1,400 m³/h (3 speeds), a throw of 10 m, 1 heat exchanger row(s), a water capacity of 0.5 dm³, and a powder-coated galvanized steel casing. Distributed in Italy by Krollit.
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Thermal Power (speeds 3/2/1): 14.7 / 13.1 / 11.3 kW
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Heating capacity range: 1.57–19.5 kW
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Air flow (speeds 3/2/1): 1,400 / 1,150 / 900 m³/h
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Isothermal throw: 10 m
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Heat exchanger rows: 1
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Water capacity: 0.5 dm³
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Casing: Powder-coated galvanized steel
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Weight: approx. 16 kg
Who uses the S1-3S and for what
The Reventon S1-3S water heater is an air heater connected to a centralized hydronic system: it uses hot water from the existing heating system (boiler, heat pump, cogeneration unit) to heat the ambient air via a 1-row heat exchanger. With 14.7 kW of thermal power at maximum speed and an air flow of 1,400 m³/h, it is sized for rooms up to approximately 150–300 m² (low-ceilinged warehouse). The 3-speed fan allows modulating the power as needed. Krollit customers use it in warehouses, mechanical workshops, storage facilities, and logistics centers that already have a hydronic system and are looking for an efficient distribution terminal.
Who is the Reventon S1-3S for?
| Profile |
Compatibility |
Reason |
| Domestic use |
Not suitable |
Sized for industrial environments. For domestic use, consider lower-power wall-mounted fan coil units. |
| Warehouse / workshop with hydronic system |
Ideal |
14.7 kW and 1,400 m³/h flow rate: sized for heating small to medium-sized artisan-industrial environments. Connection to the existing system. |
| Stand-alone system without hydronic |
Not suitable |
The water heater requires an existing hydronic system (boiler or heat pump). For environments without a hydronic system, consider electric or gas-fired air heaters. |
Not suitable for: environments without a centralized hydronic system; domestic use; installation without a specialized technician for the hydraulic connection.
Thermal and aerofluidic data
| Specification |
Value |
| Rated thermal power (speed 3) |
14.7 kW |
| Rated thermal power (speed 2) |
13.1 kW |
| Rated thermal power (speed 1) |
11.3 kW |
| Heating capacity range |
1.57–19.5 kW |
| Maximum air flow (speed 3) |
1,400 m³/h |
| Maximum air flow (speed 2) |
1,150 m³/h |
| Maximum air flow (speed 1) |
900 m³/h |
| Isothermal throw |
10 m |
Construction and hydraulic data
| Specification |
Value |
| Number of heat exchanger rows |
1 |
| Water capacity |
0.5 dm³ |
| Maximum fluid temperature |
120 °C |
| Casing |
Powder-coated galvanized steel |
| Fan |
3 speeds – IP 54 – ErP 2015 |
| Approximate dimensions (L × W × H) |
420 × 300 × 230 mm |
| Weight |
approx. 16 kg |
Compliance
| Specification |
Value |
| Fan directive |
ErP 2015 |
| Fan protection |
IP 54 |
Logistics
Shipping 5–9 business days (7 days to the South). Spare parts available with 3–5 business days shipping. Customer support in Italian available.
Frequently Asked Questions
What water temperature is needed for the S1-3S?
The air heater is designed to operate with a maximum fluid temperature of 120 °C, compatible with any standard centralized hydronic system (gas boiler, heat pump, district heating). The rated thermal power is usually measured with a supply/return temperature of 80/60 °C: at lower temperatures (e.g., 60/40 °C with heat pumps), the effective power is proportionally reduced.
What is the difference between S1, S2, S3, and S4?
The four models differ in thermal power and air flow: S1 (14.7 kW, 1,400 m³/h), S2 (23.4 kW, 2,000 m³/h), S3 (36.9 kW, 1,800 m³/h), S4 (50.1 kW, 3,350 m³/h). The choice depends on the volume of the environment and the thermal dispersion. A heating and plumbing technician can correctly size the model for the specific site.
Does the hydraulic connection require a specialized technician?
Yes. Connection to the hydronic system (supply and return pipes, control valve, air vent) requires a qualified heating and plumbing technician. Krollit provides complete technical documentation and the installation manual in Italian. Installation is not included in the supply.
Is the mounting bracket included?
The mounting bracket for wall or ceiling fixing is available as a dedicated accessory. Please check with Krollit for the availability of the specific bracket for the S1-3S model when ordering.
Is the fan compatible with thermostats and automation systems?
Yes. The S series air heaters can be equipped with accessories for automated control (thermostats, speed controllers, BMS systems). Contact Krollit for available automation options for the S1-3S.
