District heating for a ’21st Century’ village

Two 360kW biomass boilers to provide heat and hot water to 33 homes, the Village Primary School, Village Hall, Carpenters Arms Pub and Village Shop plus one other commercial property.

What is being heated:

33 homes, the Village Primary School, Village Hall, Carpenters Arms Pub and Village Shop plus one other commercial property.


Biomass boiler model:
Gilles HPKI-K 360kW

Biomass fuel:
Woodchip, G50W30 specification

Fuel store:
On floor with Walking Floor transfer to Boilers, 80 tonnes

Fuel cost savings:

286 tonnes of carbon dioxide


Special features:

New Boiler House and Fuel Store, Remote Monitoring of Boiler and all property


As part of their vision to develop a sustainable future for the Village of Miserden, the custodians of the Estate, in conjunction with Land Agents Strutt and Parker, chose Energy Innovations as their partner to install two 360kW biomass boilers to provide heat and hot water to 33 homes, the Village Primary School, Village Hall, Carpenters Arms Pub and Village Shop plus one other commercial property.

The Boiler
The two Gilles 360kW Biomass Boilers are heavy industrial specification woodchip fuelled boilers manufactured in Austria and installed to meet the total heat load of the properties all year, including the coldest periods of the year. They are automated to fuel themselves on demand and feature compressed air automatic heat exchanger cleaning and automatic ash discharge. Both Boilers are connected to a large 20,000 litre thermal store (or buffer tank) which provides an additional heat energy reserve during peak start up loads such as cold winter mornings.

Fuel handling system
Woodchip. It is anticipated that the two biomass boilers will use 440 tonnes of woodchip each year. The woodchip will be a product of the existing management of the woodland on the Miserden Estate, with all of the low value timber being extracted, naturally air dried, chipped and then stored ready for transporting to and burning in the boilers. The use of this fuel has added value to the Estate Woodland, encouraging management for timber and wildlife habitat and replanting and extending the Wooded area.

Fuel Storage
Woodchip fuel is stored in an area of the Biomass building segregated from the Boiler House by an internal dividing wall. Within the Store is a walking (or moving) floor which transfers the woodchip from the floor automatically, on demand, to the Boilers. The Store has the capacity to hold a maximum of 80 tonnes of woodchip. This is delivered to the Store either with a Tractor and bulk tipping Trailer holding about 9 tonnes of woodchip or with an articulated Lorry with walking floor Trailer holding about 22 tonnes of woodchip.

Remote monitoring
Key components of the Boiler House Plant can be monitored remotely, including the Biomass boilers and the Thermal store. This enables the Estate to monitor it without entering the Boiler House and to receive any fault messages which require a response. It also allows the Installers; Energy Innovations to respond remotely, if necessary. In addition all property Heat meters are remotely monitored, allowing the Estate to accurately recharge Tenants for heat consumption without entering or visiting each property. The low voltage communication lines that enable the Property Heat meters to be monitored were installed in the same trench network that accommodates the heat mains, the village broadband cables and the new cold water mains below them.