delta t - the delta t number installers in Waterford argue about.
Two bids can look similar while assuming different delta t values; the cheaper one often specs down. Ask for the figure in writing and check it against the manufacturer datasheet before you sign.
Waterford City Centre, Farronshoneen and Ballytruckle: Local housing mix shapes emergency plumbing specs here. Population around a steady base keeps emergency plumbing demand steady. Updated for boilerrepairwaterford searchers.