FHT Stoves is a trading name of Redford-Tech Limited, a
company owned by Simon Redford, an Engineer with 35+ years’ experience of energy related
product development, testing and energy efficiency programmes. See
for more details.
The FHT Stoves name is used for all development of the ‘Fan Heat Transfer’ Stove technology.
The FHT Stove was developed originally in response to the considerable costs and inherent dangers of connecting wood
burning stoves to central heating systems; the high thermal mass of combusting fuel may result in dangerous
boiling of simple water jacket systems in the event of restricted water flow around the jacket. The resulting design
exceeded the original remit with significant advantages for customer comfort and low-cost integration with many
different configurations of heating systems.
FHT Stove prototype under test
The FHT Stove technology has been developed and extensively tested on several different commercially available
convector stoves, proving the unique ‘switchable heat transfer’ ability of the design, its fail-safe
qualities and its ability to integrate with many different heating systems and configurations. It is particularly
suitable for integration with low-temperature systems such as Air Source Heat Pumps (ASHP), providing valuable renewable
heat support when heat pump performance is most limited by low outdoor temperatures and peak electricity prices.
The FHT Stove technology has particular relevance for EcoDesign legislation for stoves which was introduced in January
2022, and requires wood burning stoves to achieve high efficiency and low emissions. Traditional ‘back boiler’
stoves cannot achieve low emissions as the water ‘jacket’ around the fire instead of firebricks, cools the
combustion zone leading to poor combustion and greater emissions.
The FHT Stove may be one of the only stoves which can be connected to central heating circuits under the EcoDesign
legislation. This comes at a time of unprecedented gas and oil costs when integrating wood burning stoves into
household heating systems has aquired a new emphasis.