RV Water and Air Heating System for Four-Season Comfort
Enjoy quieter, more consistent cabin heat and on-demand hot water from one premium 12V hydronic heating system built for serious RV and mobile installations. Designed around the Hydronic S3 platform, the Espar AquaSystem NA combines touchscreen control, dual Silencio 2 air heat exchangers, and optional 120V electric assist for strong cold-weather performance and a more refined end-user experience.
Benefits & Use Cases
The Eberspacher Hydronic AquaSystem NA is engineered as a higher-value, fully integrated water and air heating platform for RVs, motorhomes, work vehicles, and similar mobile applications. It is designed to heat the living area and provide hot water for sinks and showers by circulating heated coolant through dedicated air and water heat exchangers.
This setup stands out with a 4.3 in full-color touchscreen, a more robust control architecture, and two Silencio 2 heat exchangers for greater heating capacity, quieter operation, and added redundancy. A metal coolant reservoir with an integrated 120V heating element helps improve cold-weather usability and supports faster warm-up when shore power is available.
- Heats cabin air and domestic water from one integrated 12V hydronic system
- Two Silencio 2 air heat exchangers support stronger and quieter interior heating
- 4.3 in full-color touchscreen improves control, diagnostics, and accessibility
- 120V electric assist adds flexibility for campground and shore-power use
- Built for premium RV, camper, utility, and mobile living installations
Vehicle Compatibility
- Recreational vehicles and motorhomes
- Camper van and overland-style hydronic heating builds
- Work vehicles needing integrated air and water heating
- Utility and specialty mobile applications similar to the above
Technical Specifications
- System
- Fuel Type: Diesel or Gasoline
- Voltage: 12V
- Applications: RVs / motorhomes, work vehicles, and similar mobile installations
- Functions: Interior air heating and hot water for sinks and/or showers
- Altitude Compensation: Automatic up to 9800 ft (3000 m)
- Hydronic S3 Diesel Heater
- Heater Model: HS3 D5E 12V CS
- Part Number: 25.2993.05.0000
- Voltage: 12V
- Max Heat Output: 17,100 BTU (5.0 kW)
- Min Heat Output: 4,400 BTU (1.3 kW);
- Fuel Consumption: 0.04 to 0.16 gal/h (0.15 to 0.59 L/h);
- Average Power Consumption During Operation: 5 to 32 W;
- Starting Power Draw: 135 W
- Minimum Coolant Flow Rate: 300 L/h
- Dimensions: 215 x 91 x 120 mm (8.5 x 3.6 x 4.7 in)
- Weight: 4.4 lb (2 kg)
- Protection Rating: IP5K6K in operation; IP5K9K not in operation
- Hydronic S3 Gasoline Heater
- Heater Model: HS3 B5E 12V CS
- Part Number: 20.2051.05.0000
- Voltage: 12V
- Max Heat Output: 17,100 BTU (5.0 kW)
- Min Heat Output: 6,100 BTU (1.8 kW)
- Fuel Consumption: Gasoline 0.23 to 0.67 L/h (0.06 to 0.18 gal/h)
- Average Power Consumption During Operation: Gasoline 7 to 32 W
- Starting Power Draw: 135 W
- Minimum Coolant Flow Rate: 300 L/h
- Dimensions: 215 x 91 x 120 mm (8.5 x 3.6 x 4.7 in)
- Weight: 2 kg (4.4 lb)
- Protection Rating: IP5K6K in operation; IP5K9K not in operation
- Air & Water Heating Components
- Air Heat Exchangers: 2 x Silencio 2
- Silencio 2 Part Number: 83.0012.01.4030
- Silencio 2 Airflow: 250 m³/h each
- Silencio 2 Power Consumption: 16 W each
- Water Heating Method: Double-walled plate heat exchanger with thermostatic mixing valve
- Water Heating Style: On-demand hot water with no storage tank
- Electric Heating Element: 1500 W, 120 VAC
- Coolant Reservoir Volume: Approx. 8 L (2.11 gal)
- Controls
- Touchscreen Interface: 4.3 in full-color display
- Touchscreen Part Number: 25.2800.70.0034
- Touchscreen Resolution: 480 x 272
- Touchscreen Operating Voltage: 9 V to 32 V
- Touchscreen Enclosure: IP67
- I/O Controller Part Number: 25.2800.70.0033
- I/O Controller Operating Voltage: 9 V to 32 V
- I/O Controller Maximum Total Current Output: 24 A
- High Altitude Module Part Number: 25.2800.70.0032
- Main Kit Part Numbers
- Hydronic AquaSystem NA Install Kit, HS3 D5E 12V: 25.2800.10.0001
- Hydronic AquaSystem NA Install Kit, HS3 B5E 12V: 25.2800.10.0002
Kit Includes
- Hydronic 12V heater unit
- Coolant pump
- Fuel metering pump
- 4.3 in touchscreen display
- I/O control module
- Double-walled plate heat exchanger
- Coolant tank with heating element
- Thermostatic mixing valve
- Thermostat switch
- 2 x Silencio 2 air heat exchangers
- High altitude module
- Exhaust / intake hose
- Coolant hose
- Exhaust silencer
- Wiring harness
- Installation hardware including fastening parts, cable ties, and holders
FAQs
Can the AquaSystem heat cabin air and hot water at the same time?
Yes. The system is designed to heat the living area and provide hot water for sinks and showers through separate heat exchangers in one coolant-based setup.
Is this available in both diesel and gasoline versions?
Yes. The AquaSystem NA is offered as a 12V diesel kit and a 12V gasoline kit, both based on the Hydronic S3 platform.
Does it support electric heating when plugged into shore power?
Yes. The coolant reservoir includes a 1500W 120V electric heating element for lower-demand heating situations when grid power is available.
How does it perform at altitude?
The system uses a high altitude module and automatically compensates up to 9800 ft (3000 m) to support more consistent heater operation.
How is hot water temperature controlled?
Hot water passes through a thermostatic mixing valve before reaching the fixtures, helping deliver more controlled outlet temperature.
Technical Specifications of the Eberspacher AquaSystem 12V RV Water & Air Heating Kit with Touchscreen control
- Fuel:
- Diesel
- Voltage:
- 12V
- Max. Heat Output:
- 17,000 BTU (5 kW)
- Heater model:
- AquaSystem
- Max. Altitude:
- 9,900 ft (3000 m)
- Fuel:
- Gasoline
Included in the kit:
RV Water and Air Heating System for Four-Season Comfort
Enjoy quieter, more consistent cabin heat and on-demand hot water from one premium 12V hydronic heating system built for serious RV and mobile installations. Designed around the Hydronic S3 platform, the Espar AquaSystem NA combines touchscreen control, dual Silencio 2 air heat exchangers, and optional 120V electric assist for strong cold-weather performance and a more refined end-user experience.
Benefits & Use Cases
The Eberspacher Hydronic AquaSystem NA is engineered as a higher-value, fully integrated water and air heating platform for RVs, motorhomes, work vehicles, and similar mobile applications. It is designed to heat the living area and provide hot water for sinks and showers by circulating heated coolant through dedicated air and water heat exchangers.
This setup stands out with a 4.3 in full-color touchscreen, a more robust control architecture, and two Silencio 2 heat exchangers for greater heating capacity, quieter operation, and added redundancy. A metal coolant reservoir with an integrated 120V heating element helps improve cold-weather usability and supports faster warm-up when shore power is available.
- Heats cabin air and domestic water from one integrated 12V hydronic system
- Two Silencio 2 air heat exchangers support stronger and quieter interior heating
- 4.3 in full-color touchscreen improves control, diagnostics, and accessibility
- 120V electric assist adds flexibility for campground and shore-power use
- Built for premium RV, camper, utility, and mobile living installations
Vehicle Compatibility
- Recreational vehicles and motorhomes
- Camper van and overland-style hydronic heating builds
- Work vehicles needing integrated air and water heating
- Utility and specialty mobile applications similar to the above
Technical Specifications
- System
- Fuel Type: Diesel or Gasoline
- Voltage: 12V
- Applications: RVs / motorhomes, work vehicles, and similar mobile installations
- Functions: Interior air heating and hot water for sinks and/or showers
- Altitude Compensation: Automatic up to 9800 ft (3000 m)
- Hydronic S3 Diesel Heater
- Heater Model: HS3 D5E 12V CS
- Part Number: 25.2993.05.0000
- Voltage: 12V
- Max Heat Output: 17,100 BTU (5.0 kW)
- Min Heat Output: 4,400 BTU (1.3 kW);
- Fuel Consumption: 0.04 to 0.16 gal/h (0.15 to 0.59 L/h);
- Average Power Consumption During Operation: 5 to 32 W;
- Starting Power Draw: 135 W
- Minimum Coolant Flow Rate: 300 L/h
- Dimensions: 215 x 91 x 120 mm (8.5 x 3.6 x 4.7 in)
- Weight: 4.4 lb (2 kg)
- Protection Rating: IP5K6K in operation; IP5K9K not in operation
- Hydronic S3 Gasoline Heater
- Heater Model: HS3 B5E 12V CS
- Part Number: 20.2051.05.0000
- Voltage: 12V
- Max Heat Output: 17,100 BTU (5.0 kW)
- Min Heat Output: 6,100 BTU (1.8 kW)
- Fuel Consumption: Gasoline 0.23 to 0.67 L/h (0.06 to 0.18 gal/h)
- Average Power Consumption During Operation: Gasoline 7 to 32 W
- Starting Power Draw: 135 W
- Minimum Coolant Flow Rate: 300 L/h
- Dimensions: 215 x 91 x 120 mm (8.5 x 3.6 x 4.7 in)
- Weight: 2 kg (4.4 lb)
- Protection Rating: IP5K6K in operation; IP5K9K not in operation
- Air & Water Heating Components
- Air Heat Exchangers: 2 x Silencio 2
- Silencio 2 Part Number: 83.0012.01.4030
- Silencio 2 Airflow: 250 m³/h each
- Silencio 2 Power Consumption: 16 W each
- Water Heating Method: Double-walled plate heat exchanger with thermostatic mixing valve
- Water Heating Style: On-demand hot water with no storage tank
- Electric Heating Element: 1500 W, 120 VAC
- Coolant Reservoir Volume: Approx. 8 L (2.11 gal)
- Controls
- Touchscreen Interface: 4.3 in full-color display
- Touchscreen Part Number: 25.2800.70.0034
- Touchscreen Resolution: 480 x 272
- Touchscreen Operating Voltage: 9 V to 32 V
- Touchscreen Enclosure: IP67
- I/O Controller Part Number: 25.2800.70.0033
- I/O Controller Operating Voltage: 9 V to 32 V
- I/O Controller Maximum Total Current Output: 24 A
- High Altitude Module Part Number: 25.2800.70.0032
- Main Kit Part Numbers
- Hydronic AquaSystem NA Install Kit, HS3 D5E 12V: 25.2800.10.0001
- Hydronic AquaSystem NA Install Kit, HS3 B5E 12V: 25.2800.10.0002
Kit Includes
- Hydronic 12V heater unit
- Coolant pump
- Fuel metering pump
- 4.3 in touchscreen display
- I/O control module
- Double-walled plate heat exchanger
- Coolant tank with heating element
- Thermostatic mixing valve
- Thermostat switch
- 2 x Silencio 2 air heat exchangers
- High altitude module
- Exhaust / intake hose
- Coolant hose
- Exhaust silencer
- Wiring harness
- Installation hardware including fastening parts, cable ties, and holders
FAQs
Can the AquaSystem heat cabin air and hot water at the same time?
Yes. The system is designed to heat the living area and provide hot water for sinks and showers through separate heat exchangers in one coolant-based setup.
Is this available in both diesel and gasoline versions?
Yes. The AquaSystem NA is offered as a 12V diesel kit and a 12V gasoline kit, both based on the Hydronic S3 platform.
Does it support electric heating when plugged into shore power?
Yes. The coolant reservoir includes a 1500W 120V electric heating element for lower-demand heating situations when grid power is available.
How does it perform at altitude?
The system uses a high altitude module and automatically compensates up to 9800 ft (3000 m) to support more consistent heater operation.
How is hot water temperature controlled?
Hot water passes through a thermostatic mixing valve before reaching the fixtures, helping deliver more controlled outlet temperature.
Choosing Guide
Option Choosing Guide for this product is coming soon, please contact [email protected] if you need help picking the right options or have any questions.
Shipping
- United States - 1-5 Working Days
- United Kingdom - 2-5 Working Days
- European Union - 2-7 Working Days
- Australia / New Zealand - 5-14 Working Days
- Rest of World - 5-14 Working Days
There may be a delay if the order is shipped to a PO or parcel shop address. Please note, some couriers do not offer shipping to PO boxes.
View full shipping & Delivery information
Returns
You can return or exchange goods within 14 days from the date of purchase if the item is unused and brand new in unopened packaging. You must contact us before returning any goods, though. Additional deductions might be applied as indicated in the Returns section of our Terms and Conditions.
Warranty Information
Most heaters come with 2 year warranty + optional 1 year extended Warranty available
- Parts - 1 Year Warranty
- Refrigerators - 2 Year Warranty
- AC Systems - 1 Year Warranty
- Heavy duty heating equipment (10 kW+) - 1 Year Warranty
- Other items - 1 Year Warranty
Installation, servicing and maintenance must be done in accordance with manufacturers guidelines. Failure to follow these guidelines will result in voiding your warranty.
We provide free technical and installation support via email or phone to all of our customers who purchase a heater, heater kit or other products from Heatso. We take pride in our customer service and want to ensure that your heater system is properly installed. As a result, if you have any difficulties, please do not hesitate to contact us.
If you require removing and/or refitting your item, please visit a local professional or authorized specialist, if you can not find one you can contact us and we will try to recommend a local partner to assist with the task. The cost of removing and/or refitting this item is not covered by the warranty.
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