Istor Information
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Istor HE 260 & HE 325 Istor units are a complete system in a box giving very high flow rates of hot water via its integeral unvented cylinder, which is heated by an integrated icos boiler.
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Flueing can be Standard horizontal up to 6m, deductions must be made to maximum flue length for each bend (other than initial bend off boiler) 90 bend deduct 1m, 45 bend deduct 0.6m. External plume management can also be fitted. see page 48 flue guide. Vertical flues can be run to a maximum of 8m. Deductions as above. Twin pipe flues are available in 60mm & 80mm diameters which allow for very long flue runs up to a maximum of 46m. See flue guide for full details |