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  2. Plenum space - Wikipedia

    en.wikipedia.org/wiki/Plenum_space

    Vertical section through a commercial building using HVAC plenum instead of airspace plenum. When both the supply and return ducts are constructed in this manner, it is possible to insulate the ducts and the dropped ceiling so that the upper airspace is not heated or cooled, increasing energy efficiency. This is a fully enclosed plenum.

  3. Cellulose insulation - Wikipedia

    en.wikipedia.org/wiki/Cellulose_insulation

    In some cases the insulation might also mix in a very small percentage of adhesive or activate a dry adhesive present in the cellulose. Wet-spray allows application without the need for a temporary retainer. In addition, wet-spray allows for an even better seal of the insulated cavity against air infiltration and eliminates settling problems.

  4. Home inspection checklist for buyers: What to know - AOL

    www.aol.com/finance/home-inspection-checklist...

    Roof Soffit vents End louvers Insulation and ventilation Electrical splices Exhaust ducts. Visible plumbing under sink ... HVAC (heating, ventilation and air conditioning), including thermostats ...

  5. Building insulation material - Wikipedia

    en.wikipedia.org/wiki/Building_insulation_material

    The vulture's feathers trap air, insulating the vulture from the cold. Natural fiber insulations, treated as necessary with low toxicity fire and insect retardants, are available in Europe : [ 15 ] Natural fiber insulations can be used loose as granulats or formed into flexible or semi-rigid panels and rigid panels using a binder (mostly ...

  6. Spray foam - Wikipedia

    en.wikipedia.org/wiki/Spray_foam

    Spray foam insulation extruding from a duct. Spray foam (expanding foam in the UK) is a chemical product created by a chemical reaction of two component parts, commonly referred to as side A and side B. [1] Side A contains very reactive chemicals known as isocyanate.

  7. Duct (flow) - Wikipedia

    en.wikipedia.org/wiki/Duct_(flow)

    Ducts for air pollution control in a 17000 standard cubic feet per minute regenerative thermal oxidizer (RTO). A round galvanized steel duct connecting to a typical diffuser Fire-resistance rated mechanical shaft with HVAC sheet metal ducting and copper piping, as well as "HOW" (Head-Of-Wall) joint between top of concrete block wall and underside of concrete slab, firestopped with ceramic ...