Saltfire ST-X4 DEFRA 4.1kW Multifuel Stove | Metallic Black Default Title The  Saltfire ST-X4  - new addition to our range of ultra-clean-burning stoves. The result of an extensive development program in our labs. The smallest of the new ST-X models - the ST-X4 is rated at  4.1kW output , and approx  80% efficiency . Constructed from a precision-welded  thick steel body  with  cast iron door  and thermo-refractory fire brick inner linings. Many times cleaner  than the required standard for \"DEFRA\" exemption, it can legally be used anywhere in the UK including the strictest of smoke control zones. Designed with simple,   easy to operate user friendly controls .  Designed with a  large viewing window for amazing views of the fire . The flame pattern with the advanced \"after-burner\" system is quite unique. The ST-X4 is a  multi-fuel  stove able to efficiently burn wood logs or smokeless coal - the coal ashes will fall through the grate and into the ash can which easily lifts out when full. Finished in black high temperature paint which we source from the USA and with thermo-ceramic clear glass from the industry-leading \"Schott\" brand in Germany. There is an  air-wash system  to help keep the glass clearer. The ST-X4 has a 5\"(125mm) diameter top and rear flue outlet. Can be used with 5\" diameter flue liner or twinwall flue.    Specifications Product Specifications Services We can offer a full HETAS compliant installation service with this stove for an additional cost. Please contact us to arrange a Free Quote.All stove installations are carried out by Rugby Stove Installations Limited.