Cosy Heating Services Knottingley supply commercial & residential boiler installation servicing & repair services throughout the Wakefield area, including Castleford Pontefract Normanton Ossett Dewsbury and Altofts. As Gas Registered & experienced gas engineers we focus on safety & great customer service. We always aim to get the job done quickly & safely leaving your premises clean and tidy when we have finished. For a free quotation call us now.