Radiant floor wall and ceiling hydronic heating and/or cooling systems, using modular panels hinged together in sets of panels, staggering the positions of panels in the sets so that sets are interlocking

In a hydronic radiant heating and/or cooling system having a heating/cooling loop including a length of tubing that conducts water, mounted in a floor, wall or ceiling of a room heated/cooled by said system and modular panels each of a metal plate or sheet on a board or boards providing an elongated tube holding space into which tubing is inserted and held against the plate in intimate thermal contact therewith, so that the plate is heated/cooled by conduction of heat between the water in the tubing and the plate, the method including the steps of:

• (a) providing two or more sets of said panels hinged together to provide two or more hinged sets of panels,
• (b) said panels of each set being hinged together along their sides in a regular staggered relationship,
• (c) unfolding said two or more sets of hinged panels at their hinges and arranging said unfolded sets end to end on a floor, wall or ceiling and
• (d) interlocking said unfolded sets that are end to end with each other, abutting each other,
• (e) whereby said elongated tube holding spaces of said panels of said sets into which said tubing is to be inserted are aligned.