Devices for heating and ventilating, supplying and heating water, cooking, systems and devices for conditioning, drying and atypical air conditioning and ventilation technical apparatus, sanitary devices, tubular radiators and plate radiators, parts and combinations thereof, special radiators with reflective surfaces not of metal, convectors, taps and plumbing fixtures, controlling, regulating and safety elements, shower cubicles, bathroom and washroom equipment, transportation packaging (adapted to the shape of the product) and protective covers for radiators