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Core Features & Benefits
SureCal 10 liter horizontal calorifier/boiler
Please note - the outer shell is very soft, therefore you might see minor cosmetic defects, but they have no impact to the performance of the calorifier.
Calorifiers from SureCal are built from the best materials, making them efficient and dependable. It uses drop coil technology as well as an immersion heater to heat up the stored water. With the finned surface heat exchanger used in the boiler, heat recovery is unmatched.
The heat from your engine's cooling system is used to warm up the clean water from your onboard water system. The RV water heater also features a standard thermostatic mixer valve, which increases hot water capacity by up to 25 percent.
Benefits of the 10 Liter SureCal:
Polyurethane insulation is applied to the copper calorifier
After being switched off, the immersion coil retains heat for up to 24 hours.
Complete instructions are included for quick and easy installation.
The calorifier features an immersion hot water heater, stainless steel fixing clamps, and barbed engine coil connections.
Thermostatic mixer valves are standard on every unit to ensure ample hot water supply.
In the boiler, water is heated to the same temperature as the immersion coil (85°C / 185°F).
Complete your domestic water circle
In order for your hot water system to function smoothly and securely, only a few essential parts are needed. A complete water circle consists of an expansion tank, an accumulator tank, a water pump, and a calorifier.
An expansion tank is used to protect closed water heating systems and domestic hot water systems from sudden pressure spikes. It can be fitted in any orientation, preferably as close to the calorifier as possible. A 2 liter or 5 liter expansion tank should be sufficient to meet most of your hot water needs in an RV, campervan, or mobile home.
Calorifier Size
Recommended Expansion Tank Size
0-22 Litres
2 Litres
22-55 Litres
5 Litres
An accumulator tank consists of a water chamber and a pre-pressurized air bladder. It is installed on the pressurized side of the water pump and dampens pressure spikes in the water system. Water accumulator tanks conserve battery power, reduce pump cycling, and increase the durability of water pumps.
RVs require water pumps to provide running water, which is essential for living off-grid comfortably. With an onboard water pump, you can wash your hands, fill the sink, take a shower, and do many other tasks at home that you take for granted. Normally, a 30PSI water pump is sufficient to provide a comfortable stream of water for RV owners.
SureCal is United Kingdom manufacturer for calorifiers (boilers/ water heaters) that are made out of the finest quality materials. Calorifiers are with BSP threads / connections.
Included in the kit:
Thermostatic mixer valve
4 bar pressure release valve
Immersion heater (selected as an option)
Non-return valve
15mm barbed connections for coil, ready for 15mm push fit plastic plumbing
SureCal 10 liter / 2.64 gal Horizontal Single Coil Calorifier
Hole in end of tank
Why is there a large open threaded hole in the end of the tank? I did not order AC or DC heater. I’m heating with engine antifreeze. The tank picture above does not have any open holes in the end of the tank.
Posted by Randall Graber on 1st Feb 2024
Why is there a hole on the end of the tank?
There is a large threaded hole in the end of the tank, but I have to do put a plug in it. I’m not heating with AC or DC. This is heating off the engine antifreeze.
