If your heating engineer discovers that your water circulation is inefficient, he or she may recommend a powerflush.
www.independent.co.uk Diggers rallied and tin sheeting was scrambled as the heating engineers fiddled.
www.telegraph.co.uk However, as a rule of thumb, heating engineers estimate that a ducted air system will be around 80 per cent efficient.
www.thisismoney.co.uk Many of these occupations adopt the term engineer, professional engineer, registered engineer, gas engineer, heating engineer, drainage engineer, automobile engineer, aircraft engineer and many hundreds of derivatives.
en.wikipedia.org There are several reasons why radiators might be cold at the bottom, other than sludge, and some independent heating engineers tell me that powerflushing is overpriced and oversold.
www.telegraph.co.uk