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§ 1591.08
<br />DWELLING HOUSE CODE
<br />Listing Requirements for Automatic
<br />Pilots ASA 221.20.
<br />Listing Requirements for Automatic Main
<br />Gas-Control Valves-ASA 221.21.
<br />Listing Requirements for Relief and Auto-
<br />matic Gas Shut-off Valves for Use on Water
<br />Heating Systems-ASA 221.22.
<br />Listing Requirements for Gas Appliance
<br />Thermostats-ASA 221.23.
<br />Listing Requirements for Furnace Tem-
<br />perature Limit Controls and Fan Controls
<br />ASA 221,29.
<br />Installation of Gas Piping and Gas Appli-
<br />ances in Buildings-ASA 221.30.
<br />Approval Requirements for Gas-Fired
<br />Duct Furnaces-ASA 221.34.
<br />6b. Gas Floor Furnaces-Gravity Circu-
<br />lating Type-Commercial Standard CS99.
<br />6c. Storage and Handling of Liquefied
<br />Petroleum Gases. NFPA 58.
<br />7. Miscellaneous coal burning equipment.
<br />Automatic Stokers-Domestic Burners for
<br />Pennsylvania Anthracite (Underfeed Type)
<br />-Commercial Standard CS48.
<br />1591.08 Fire safety requirements for instal-
<br />lations. '
<br />No heaters, furnaces, boilers, plenum
<br />chambers, smokepipes, or gas vent connec-
<br />tors shall be located beneath combustible
<br />stair construction unless such stair construc-
<br />tion isprotected so as to have a fire resistance
<br />rating of not less than 1 hour.
<br />1591.09 Approval of devices and installa-
<br />tions.
<br />(a) Acceptable heat appliances. All heat
<br />appliances, devices, accessories and controls
<br />shall be of a type approved by this Dwelling
<br />House Code or by the Board of Building
<br />Code Appeals. Heat appliances, devices, ac-
<br />cessories or controls listed by the Under-
<br />writers' Laboratories, Inc., or the American
<br />Gas Association, or tested and approved by
<br />any other accredited testing laboratory shall
<br />be deemed approved by the Board of Build-
<br />ing Code Appeals unless and until by.formal
<br />action it disapproves the' same.
<br />(b) Questionable devices, No heating
<br />equipment which produces or may produce
<br />harmful or obnoxious gases or smoke, or fly
<br />ash or dust, shall be installed except in con-
<br />formity with a duly adopted rule or regula-
<br />tion governing such installations and subject
<br />to the approval of the Building Official.
<br />1591.10 Air supply for combustion and
<br />ventilation.
<br />(a) General requirements. No fuel-burn-
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<br />ing device or appliance shall be installed or
<br />maintained without provisions for an air
<br />supply adequate to ensure proper combus-
<br />tion of the fuel. Where afuel-burning device
<br />or appliance is installed or maintained in an
<br />inside room or space, such air supply shall
<br />be provided through ducts or openings lead-
<br />ing to the outside air or to rooms having an
<br />ample supply of outside air, and such ducts
<br />or openings shall have an effective cross-
<br />sectional area not less than the area of the
<br />chimney; flue, smokepipe, or gas vent con-
<br />nected to such device or appliance.
<br />(b) Mechanical exhaust ventilation.
<br />Where a room or space in which afuel-burn-
<br />ing device or appliance is installed is ven-
<br />tilated by means of mechanical exhaust ven-
<br />tilation, air sufficient to replace that ex-
<br />hausted and that consumed by combustion
<br />shall be supplied from a safe, uncontami-
<br />nated source.
<br />(c) Precautions. Every room or space in.
<br />which afuel-burning device or appliance is
<br />installed shall have provisions which will
<br />prevent unsafe air temperature rise due to
<br />use of such device or appliance. When such
<br />device or appliance is connected to a chim-
<br />ney, flue, smokepipe, or gas vent, provisions
<br />shall be made to permit the escape of the
<br />products of combustion from the room or
<br />space in the event of back-draft.
<br />1591.11 Standards for installation of oil-
<br />fired equipment.
<br />Except as provided in Sections 1591.12 to
<br />1591.16 inclusive, the installation of oil-burn-
<br />ing equipment shall conform to NBFU Pam-
<br />phlets 31 and 310, Commercial Standard CS-
<br />75, and of Section 1591.07.
<br />1591.12 Standards for installation of gravity
<br />feed to oil-fired burners.
<br />(a) ,Burner control. Gravity feed shall be
<br />used only with burners arranged to prevent
<br />abnormal discharge of oil at the burner by
<br />automatic means specifically approved by
<br />the Underwriters' Laboratories, Inc. for the
<br />burner with which it is used.
<br />(b) Supply tanks. Gravity supply tanks
<br />shall not exceed 275 gallons individual ca-
<br />pacity,, nor 550 gallons :aggregate capacity.
<br />'Where more than ,one gravity' supply tank
<br />is used, such tanks shall be connected sepa-
<br />rately to the feed pipe leading to the burner
<br />or valved in such a way that only one tank
<br />can discharge its contents at one time. Tanks,
<br />above ground, may be installed outside
<br />buildings if protected.from the weather and
<br />mechanical damage,
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<br />Natural Light and Ventilation
<br />§ 1529.10
<br />1527.05 1Vlinimum house sizes excluded.
<br />It is not intended by the preceding four
<br />sections to establish or create in any way
<br />minimum house sizes.
<br />1527;06 Cellar and basement occupancy.
<br />No room or space in any cellar shall be
<br />used for sleeping purposes. No room in any
<br />basement shall be occupied as a habitable
<br />room if a fmished floor at a required window
<br />is more than 2'-6" below the finished grade
<br />at the window. A recreation room in a cellar
<br />shall not be considered as a habitable room.
<br />CIIAPTER 29.. NATURAL LIGIiT AND VENTILATION
<br />1529.01 General.
<br />The lighting and ventilation of habitable
<br />spaces shall be such as to provide satisfactory
<br />and healthful living conditions and, in attic
<br />and basement areas, to prevent conditions
<br />conducive to deterioration.
<br />1529.02 Glass area.
<br />In determining required glass area, the
<br />gross area within a sash including all mun-
<br />tins shall be considered. When the sill of a
<br />basement window is below the extended line
<br />of the finished grade at the window, only half
<br />of the below-grade glass area of that window
<br />shall be included in determining the required
<br />glass area.
<br />1529.03 Minimum window requirements.
<br />All habitable rooms shall be provided with
<br />natural light by means of one.or more win-
<br />dows orskylights or their equivalent located
<br />in outside walls or roofs. The required glass
<br />area in a habitable room shall be not less
<br />than ten square feet nor ten per cent of the
<br />floor area of the room, whichever is greater.
<br />Not less than forty per cent of such required
<br />glass area shall be openable for ventilation
<br />unless mechanical ventilation is installed in
<br />accordance with Chapter 31.
<br />1529.04 Additional area required.
<br />If windows open on covered. parches and
<br />terraces, or are in rooms any portion of
<br />which is more than eighteen feet from a win-
<br />dow, the glass area shall be not less than
<br />fifteen per cent of the floor area of the room.
<br />1529.05 Bathrooms and.lavatories.
<br />Unless proper artificial light and mechani,
<br />cal ventilation are installed in accordance
<br />with Chapter 31; natural `light and ventilation
<br />for bathrooms and lavatories shall be pro-
<br />vided by windows or skylights with a glass
<br />area of not less than three square feet or ten
<br />per cent of the floor area, whichever is
<br />greater. Tlie. ventilating area shall be not
<br />less than four per cent of the floor area. If a
<br />compartmentcontaining any one fixture
<br />opens directly"into-the bathroom, it shall be
<br />considered a part of the bathroom floor area
<br />and may be lighted artificially and ventilated
<br />into the bathroom.
<br />1529.06 Glazed doors.
<br />The area of glazed portion of doors in ex-
<br />terior walls may be included in determining
<br />compliance with the glass area requirements;
<br />however, an exterior door in a kitchen or
<br />bedroom shall not be acceptable as the only
<br />means of providing natural.ventilation.
<br />1529.07 Alternate glazing.
<br />Any glazing material may be used to pro-
<br />vide natural light if the area is sufficient to
<br />admit an amount of light equivalent to that
<br />transmitted by the required area of clear
<br />glass.. In no case shall the area be less than
<br />that required for clear glass. .
<br />1529.08 Areas below grade.
<br />Areas below grade, other than habitable
<br />rooms, shall be provided with natural light
<br />and ventilation by windows or doors in ex-
<br />terior walls with both glazed and ventilat-
<br />ing area of not less than two per cent of the
<br />floor area.
<br />1529.09 I$eater room or space.
<br />Ventilation for heater room or space shall
<br />be provided by means of grilles, louvers, or a
<br />duct arranged to supply air from outside or
<br />from a permanently ventilated under-floor
<br />or attic space, Ducts shall be screened and
<br />have a free area at least equal to the free '
<br />area of flues or vents to which the fuel-burn-
<br />ing equipment is connected. Grilles or lou-
<br />vers shall be in pairs, one located near the
<br />floor and the other near the ceiling, each to
<br />have a free area of at least 1 square inch for
<br />each 1A00 Btuh input rating of the heating
<br />device.
<br />1529.10 Basementless spaces.
<br />(a) Height. Ground level shall be at least
<br />eighteen inches below bottom floor framing.
<br />Where necessary to provide access for main-
<br />tenance and repair in the under-floor space,
<br />a space not les's than two feet below bottom
<br />of joist shall be provided. All debris;: top
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