When selecting a diesel hot water and air heating system for your caravan, RV, or boat, it’s crucial to choose the right fan head to ensure optimal heating efficiency. Hydronic heating systems use fan heads to transfer heat from circulating coolant to the air, and the size and power rating of the fan head determine its performance.
At Dieselheat, we offer a variety of diesel hot water and air heating fan heads from Kalori and our own ducted models, tailored to meet the needs of your mobile living space.
Kalori Fan Heads for Compact Installations
Kalori fan heads are compact, designed for installation in tight spaces such as cupboards or bulkheads, making them ideal for small caravans or RVs. While space-efficient, these fan heads are generally less powerful than their ducted counterparts.
- Fan Type: Two-speed axial computer fan
- Noise Levels: Quiet on the low setting but can be slightly noisy (up to 60dB) on high settings
- Ideal For: Caravans, RVs, and boats where space is limited
Dieselheat Ducted Fan Heads for Enhanced Performance
Our Dieselheat ducted fan heads feature larger heat transfer coils, offering greater power and lower noise. While slightly bulkier, these fan heads can be installed in unused or concealed spaces, distributing warm air through 60mm vents for optimal heating.
- Fan Type: EC-controlled drum fan with infinitely variable speed
- Noise Levels: Maximum 51dB, operating more quietly than Kalori models
- Ideal For: Larger RVs, caravans, or boats where efficiency and quieter operation are priorities
Benefits of Installing Fan Heads in Hydronic Heating Systems
Fan heads in hydronic air heating systems can be mounted remotely from the hot water system, allowing for flexible installation. Multiple fan heads can also be used to distribute heat evenly across different areas of your RV, caravan, or boat.
Pro Tip: Ensure an open return air pathway to maintain efficient airflow and heating.
Thermostat Control for Precise Temperature Regulation
Both Kalori and Dieselheat ducted fan heads are compatible with the Dieselheat Hydronic Thermostat, which offers 3 adjustable manual power levels as well as an automatic mode for regulating the room temperature. For quieter operation with Kalori fan heads, setting the fan speed to 80%-90% of its maximum power reduces noise while maintaining heating efficiency.
Comparing Fan Heads: Real-World Performance
While manufacturers provide theoretical power ratings, real-world conditions often vary. To assist you in choosing the best fan head for your RV, caravan, or boat, we provide detailed performance comparisons, including actual power outputs and noise levels, so you can make an informed decision.
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Fan Unit
Real Heat Output*
Max Noise**
Suggested Use
Kalori Silencio FA
0.9kW
55dB
Small bathrooms in boats, RVs or small vans (e.g. Volkswagen T6)
Kalori VA200
1.2kW
57dB
Small boat living spaces, larger vans (Sprinter, Transporter), small caravans.
Kalori Silencio 2
2kW
60dB
Larger living spaces in boats, larger caravans up to about 20 feet.
Dieselheat 1.8kW Ducted Fan
1.6kW
51dB
Boat saloons, caravans up to 21 feet, larger spaces.
Dieselheat 3.6kW Ducted Fan
3.2kW
52dB
Caravans over 22 feet, large boat saloons, spaces in cold climates.
*Heat outputs are based on measurements undertaken at our Dieselheat workshop in real world conditions. We assume 70 degree coolant and 20 degree air.
**Noise measurements are done at our Dieselheat workshop with simple equipment. Measurements are taken 1m from the fan head front with the unit installed in a wooden box to simulate real world conditions.
Still unsure? We’re passionate about providing the best diesel solutions and would love to chat about which system would work best for you! You can contact us or see here for our range of hydronic system fan heads.
