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  2. 6 Home Depot Products Under $50 That Will Reduce Your ... - AOL

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    Price: $31.36 A water heater insulation blanket can make your water heater more efficient. This fiberglass insulation blanket insulates your tank, keeping the heat in.

  3. 10 Home Depot Items You Should Stock Up on Now If You Live in ...

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    Frost King Indoor Window Insulation Kit. Price: $4.98. If your house gets drafty in the winter months, pick up a Frost King Indoor Window Insulation Kit. Designed for use on interior windows, each ...

  4. Stack effect - Wikipedia

    en.wikipedia.org/wiki/Stack_effect

    The draft (draught in British English) flow rate induced by the stack effect can be calculated with the equation presented below. [12] [13] The equation applies only to buildings where air is both inside and outside the buildings. For buildings with one or two floors, h is the height of the building and A is the flow area of the openings.

  5. Draft (boiler) - Wikipedia

    en.wikipedia.org/wiki/Draft_(boiler)

    Normally it is done with the help of a forced draft fan. [2] Induced draft: When air or flue gases flow under the effect of a gradually decreasing pressure below atmospheric pressure. In this case, the system is said to operate under induced draft. The stacks (or chimneys) provide sufficient natural draft to meet the low draft loss needs.

  6. Heating, ventilation, and air conditioning - Wikipedia

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

    HVAC ventilation exhaust for a 12-story building An axial belt-drive exhaust fan serving an underground car park. This exhaust fan's operation is interlocked with the concentration of contaminants emitted by internal combustion engines. Mechanical, or forced, ventilation is provided by an air handler (AHU) and used to control indoor air quality.

  7. Chimney - Wikipedia

    en.wikipedia.org/wiki/Chimney

    A chimney cowl or wind directional cap is a helmet-shaped chimney cap that rotates to align with the wind and prevent a downdraft of smoke and wind down the chimney. An H-style cap is a chimney top constructed from chimney pipes shaped like the letter H. It is an age-old method of regulating draft in situations where prevailing winds or ...