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  2. Chernobyl New Safe Confinement - Wikipedia

    en.wikipedia.org/wiki/Chernobyl_New_Safe_Confinement

    A third, more massive member, the "Mammoth Beam", spans the largest distance across the roof from east to west and assists in supporting the roof beams and panels. The roof of the shelter consists of 1 metre (3 ft 3 in) diameter steel pipes laid horizontally north to south, and steel panels that rest at an angle, also in the north-south direction.

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  4. Sunroof - Wikipedia

    en.wikipedia.org/wiki/Sunroof

    Removable roof panels (t-tops or targa roofs) open a vehicle roof to the side windows, providing a wider opening than other roof systems. The Targa body style is identical in configuration to the Sedanca but is designed for owner-driven rather than chauffeured cars and while a Sedanca style implies a rear passenger area, the Targa does not.

  5. Passive ventilation - Wikipedia

    en.wikipedia.org/wiki/Passive_ventilation

    A roof turbine ventilator, colloquially known as a 'Whirly Bird' is an application of wind driven ventilation. Passive ventilation is the process of supplying air to and removing air from an indoor space without using mechanical systems .

  6. Glossary of HVAC terms - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_HVAC_terms

    An air conditioner and heater combined into a single, electrically powered unit, typically installed through a wall and often found in hotels. Abbreviated PTAC. PAG Polyalkylene glycol is a synthetic oil used in A/C systems to lubricate the compressor. Most all newer model cars use PAG as the lubricant in the A/C system. packaged unit

  7. Domestic roof construction - Wikipedia

    en.wikipedia.org/wiki/Domestic_roof_construction

    This is why UK Building Regulations require roofs to be ventilated, either by the use of soffit vents, ridge vents, or replacement ventilation slates or tiles. [7] A common method of ventilating a roof is to make openings in the soffit and ridge to allow natural air flow. This example also has ventilated exterior walls called rainscreen ...

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