There are two different types: flat plate, where lots of thin tubes carry water through a flat absorber panel, and evacuated tube, where vacuum glass tubes capture the sun’s energy directly. There is little difference in performance between the two but evacuated tube panels do more obviously extrude from the roof.
Barmouth
Barmouth is a community and also area in the county of Gwynedd, north-western Wales, pushing the tidewater of the River Mawddach and Cardigan Bay. Found in the Historic county of Merionethshire, the Welsh kind of the name is derived from "Aber" (tidewater) and the river's name, "Mawddach". The English form of the name is a corruption of the earlier Welsh kind 'Abermawdd'. The town is served by Barmouth train station. The community expanded around the shipbuilding market, as well as much more lately as a seaside hotel. Notable structures include the middle ages Ty Gwyn tower house, the 19th century Ty Crwn roundhouse jail as well as St John's Church. William Wordsworth, a visitor to Barmouth in the 19th century, defined it therefore: "With a great sea sight in front, the hills behind, the wonderful tidewater running eight miles [13 kilometres] inland, as well as Cadair Idris within compass of a day's walk, Barmouth can constantly hold its very own against any rival." Dinas Oleu (Citadel of Light), which is located east of the town on the adjoining hill, was the initial system of land to be given away to the National Trust.