The present invention relates to a method for installing a magnesium ondol panel on which an ondol panel made of a magnesium material is installed. The ondol panel (100) includes a magnesium panel (120); a plurality of blocks (130) of a plastic material installed on the lower side of the magnesium panel (120); and a heating pipe (140) which is arranged in an installation groove (135) formed on the top surfaces of the blocks (130). The height of the blocks (130) can be adjusted. A protrusion (131) is formed on the top surface of the block (130), and a groove (132) is formed on the underside of the block (130). The protrusion (131) is joined to the groove (132) so that the blocks (130) are vertically joined and the height of the blocks can be adjusted. The present invention is provided to easily adjust the height of the ondol panel; to have excellent thermal conductivity; and to remarkably improve heating efficiency as heat is evenly dispersed on the floor and an indoor space.
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