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Load units and laddomats

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.

Have a look at this short clip to see exactly how they work.

For a fuller discussion on this topic please see our heat charger page.

We offer three types – LK Armatur, Laddomat and Esbe.

We normally specify the LK Armatur brand because we reckon it's the best quality on the market. The LK Armatur units are compact and trouble-free and offer 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 UK

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

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 stove load unit - heat charger uk

ESBE LTC load units

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 vtc load valves - vtc511 vtc512

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. 

Visit our ESBE load valves page, or click on the picture for more details

Laddomat heat charger

Laddomat 21

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

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