Load units and load valves (also known as heat chargers) are a clever way of getting more from your boiler stove. The concept is very simple - until the water in the boiler is hot the heat charger directs the water straight back to the stove. This small volume of water heats very quickly. Once the water has reached 60º the heat charger starts to open, allowing some water to flow to and from the main heating system, whilst still maintaining a temperature of at least 60º in the boiler.
This means that the stove comes up to temperature very quickly and then stays there. This greatly improves the efficiency of burning, reduces condensation in the firebox (making the boiler last longer), and ensures that the water that does get to your hot water tank or radiators is always nice and hot.
For a fuller discussion on this topic please see our heat charger page.
We offer three types – the LK Armatur, the Laddomat and the Esbe.
We normally specify the LK unit because we reckon it's the best load unit on the market. It's a compact and trouble-free unit that offers exceptionally good value for money. LK Armatur is the market leader in this field and have been making specialist valves for over 30 years and manufacture more than a million a year.
LK Armatur Load units
The LK load units are built in Sweden to a very high specification and are designed to provide long term use and give accurate control of the water flow from a boiler stove. Units are available to suit the various different sizes of boiler stoves and log gasifying utility boilers. The full unit, comprising the valve, pump, thermosyphon by pass and gauges form a neat and compact unit and come complete with an insulating cover.
Visit our LK Armatur Load units page, or click on the picture for more details
LK Armatur Load valves
The purpose of a load valve is to make sure that the best possible temperature stratification in the thermal store is achieved and also a high temperature which returns to the boiler stove. This means that there is an increased life of the boiler stove and greater efficiency to the heating system.
Visit our LK Armatur Load valves page, or click on the picture for more details
ESBE LTC load units
The ESBE LTC series load units are the neatest and most compact heat chargers I have come across so far. The LTC series load units we offer here maintain high return temperatures to the boiler and are suited to use with boiler stoves and log gasification boilers. The valves, pump, thermostatic gauges and thermosyphon bypass are all neatly contained, and the load unit comes with a removable insulating cover.
Visit our ESBE LTC load units page, or click on the picture for more details
ESBE load valves
Esbe VTC load valves are 3-way thermostatic valves which can be used in conjunction with a pump and flue thermostat to maintain high return temperatures to the boiler. For boiler stoves we advise the use of a VTC511 valve, and for log gasifiyers the larger VTC512 as this valve allows for higher flow rates.
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The Laddomat 21 is a heat charger suited to boilers of up to 80kW output.
Visit our Laddomat 21 page, or click on the picture for more details