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  2. Bellows - Wikipedia

    en.wikipedia.org/wiki/Bellows

    Diagram of a fireplace hand-bellows. A bellows or pair of bellows is a device constructed to furnish a strong blast of air.The simplest type consists of a flexible bag comprising a pair of rigid boards with handles joined by flexible leather sides enclosing an approximately airtight cavity which can be expanded and contracted by operating the handles, and fitted with a valve allowing air to ...

  3. Franklin stove - Wikipedia

    en.wikipedia.org/wiki/Franklin_stove

    A Franklin stove. The Franklin stove is a metal-lined fireplace named after Benjamin Franklin, who invented it in 1742. [1] It had a hollow baffle near the rear (to transfer more heat from the fire to a room's air) and relied on an "inverted siphon" to draw the fire's hot fumes around the baffle. [2]

  4. Fire door - Wikipedia

    en.wikipedia.org/wiki/Fire_door

    No parts are missing or broken. Door clearances at the door edge of the door frame (Wood Door), on the pull side of the door, do not exceed clearances listed in 4.8.4 (the clearance under the bottom of the door shall be a maximum of 3/4") and 6.3.1 (top & edges 1/8") Metal door (top & edges up to 3/16")

  5. List of This Old House episodes (seasons 11–20) - Wikipedia

    en.wikipedia.org/wiki/List_of_This_Old_House...

    This Old House is an American home improvement media brand with television shows, a magazine and a website, ThisOldHouse.com. The brand is headquartered in Stamford, CT.The television series airs on the American television station Public Broadcasting Service (PBS) and follows remodeling projects of houses over a number of weeks.

  6. Heating, ventilation, and air conditioning - Wikipedia

    en.wikipedia.org/wiki/Heating,_ventilation,_and...

    In the United States, federal licensure is generally handled by EPA certified (for installation and service of HVAC devices). Many U.S. states have licensing for boiler operation. Some of these are listed as follows: Arkansas [46] Georgia [47] Michigan [48] Minnesota [49] Montana [50] New Jersey [51] North Dakota [52] Ohio [53] Oklahoma [54 ...

  7. Air purifier - Wikipedia

    en.wikipedia.org/wiki/Air_purifier

    A short pipe allowed breathed air to escape. The garment was to be constructed from leather or airtight cloth, secured by straps. [1] In the 1860s, John Stenhouse filed two patents applying the absorbent properties of wood charcoal to air purification (patents 19 July 1860 and 21 May 1867), thereby creating the first practical respirator. [2]

  8. Door handle bacteria - Wikipedia

    en.wikipedia.org/wiki/Door_handle_bacteria

    The material of the handle itself contributes to the growth of bacteria, with most door handles being constructed of stainless steel – a suitable home for bacteria. The material can affect the time bacteria can survive on door handles, but more important is the temperature and humidity of the environment.

  9. Building airtightness - Wikipedia

    en.wikipedia.org/wiki/Building_airtightness

    An airtight building has several positive impacts [3] when combined with an appropriate ventilation system (whether natural, mechanical, or hybrid): [4] Lower heating bills due to less heat loss, with potentially smaller requirements for heating and cooling equipment capacities; Better performing ventilation system

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