John Z.
Are the boilers mentioned condensation type?
No, the boilers mentioned in the document (CGLB23-1H, CGVB23-2H, etc.) are not condensation boilers. The document classifies them as wall-mounted gas boilers using either natural draft, V.M.C. extraction, or a sealed flue, and does not refer to condensation technology. Additionally, for C/N GVB models, the performance table indicates a "Low temperature" efficiency class.
