NOVELTY - The covering e.g. vertical blind (30), has a soft shade made of a base material, where the shade comprises a first side (306) provided with a solar heat absorbing coating for absorbing solar heat and a second side (307) provided with a reflective coating for reflecting sunlight. A fluid channel e.g. water channel, transfers the solar heat. The fluid channel is placed within two layers of transparent plates. The shade is provided with adjustable and rotatable vertical slats (300, 305) placed next to one another. The shade includes a detachable soft accessory for attaching the shade on a window.    USE - Energy saving covering e.g. venetian blind, vertical blind, shutter and curtain such as glass curtain, attached curtain, loose curtain, sheer and net curtain, for a solar heating system, utilized in windows and doors of buildings e.g. industrial buildings, commercial buildings, agriculture buildings and residential buildings, and transportation tools (all claimed) e.g. air/road/rail/maritime transportation tools such as aircrafts, airplanes, cars, buses, lorries, trains, boats and ships.    ADVANTAGE - The covering utilizes a control system to allow the slats to face sunlight at an optimum angle at any time so as to increase heat collection efficiency of the solar heating system. The solar heating system requires power to rotate the slats only, thus saving energy. The second side of the shade reduces radiation heat transfer from outdoor environment to internal space when indoor temperature is lower than outdoors, so that the covering can save space heating and cooling energy in a simple and cost effective manner.    DETAILED DESCRIPTION - The base material is selected from a group consisting of drapery/cloth, wood, bamboo, metal, alloy, polymer and plastic. The first side of the base material is provides with a solar heat selective coating comprising elements selected from a group of metal, aluminum, copper, titanium, chromium, oxygen and nitrogen. An INDEPENDENT CLAIM is also included for a solar heating system.    DESCRIPTION OF DRAWING(S) - The drawing shows a perspective view of a door vertical blind with a first side for absorbing solar heat and a second side for reflecting sunshine.    Vertical blind (30)    Adjustable and rotatable vertical slats (300, 305)    Head-rail (301)    Rotating angle control cord (304)    Sides of shade (306, 307)