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General Regulations (18-28-301 et seq.)

Municipal Code of Chicago tit. 18, ch. 18-28, art. III
in effect

Municipal Code of Chicago § 18-28-301.1 Scope.

18-28-301.1 Scope. This chapter shall govern the approval and installation of all equipment and appliances that are part of a building's mechanical system regulated by this chapter in accordance with Section 18-28-101.2. (Amend Coun. J. 9-14-21, p. 35949, Art. III, § 1)

Municipal Code of Chicago § 18-28-301.2 Energy utilization.

18-28-301.2 Energy utilization. The heating, ventilating and air-conditioning systems of all structures shall be designed and installed for efficient utilization of energy in accordance with the Chicago Energy Conservation Code. (Amend Coun. J. 9-14-21, p. 35949, Art. III, § 1)

Municipal Code of Chicago § 18-28-301.3 Identification.

18-28-301.3 Identification. Each length of pipe and tubing and each pipe fitting utilized in a mechanical system shall bear the identification of the manufacturer. (Amend Coun. J. 9-14-21, p. 35949, Art. III, § 1)

Municipal Code of Chicago § 18-28-301.4 Plastic pipe, fittings and components.

18-28-301.4 Plastic pipe, fittings and components. Plastic pipe, fittings and components shall be third-party certified as conforming to NSF 14. (Amend Coun. J. 9-14-21, p. 35949, Art. III, § 1)

Municipal Code of Chicago § 18-28-301.5 Third-party testing and certification.

18-28-301.5 Third-party testing and certification. Piping, tubing and fittings shall comply with the applicable referenced standards, specifications and performance criteria of this chapter and shall be identified in accordance with Section 18-28-301.3. Piping, tubing and fittings shall either be tested by an approved third-party testing agency or certified by an approved third-party certification agency. (Amend Coun. J. 9-14-21, p. 35949, Art. III, § 1)

Municipal Code of Chicago § 18-28-301.6 Fuel gas appliances and equipment.

18-28-301.6 Fuel gas appliances and equipment. The approval and installation of fuel gas distribution piping and equipment, fuel gas-fired appliances and fuel gas-fired appliance venting systems shall be in accordance with Article 14 of this chapter. (Amend Coun. J. 9-14-21, p. 35949, Art. III, § 1)

Municipal Code of Chicago § 18-28-301.7 Listed and labeled.

18-28-301.7 Listed and labeled. Appliances regulated by this chapter shall be listed and labeled for the application in which they are installed and used, unless otherwise approved in accordance with Chapter 14A-10. Exception: Listing and labeling of equipment used for refrigeration shall be in accordance with Section 18-28-1101.2. (Amend Coun. J. 9-14-21, p. 35949, Art. III, § 1)

Municipal Code of Chicago § 18-28-301.9 Label information.

18-28-301.9 Label information. A permanent factory-applied nameplate shall be affixed to all appliances. The nameplate shall contain the following information about the appliance in legible lettering: the manufacturer's name or trademark, the model number, the serial number and a seal or mark of the approved agency. A label shall include the following: 1. Electrical equipment and appliances. Electrical rating in volts, amperes and motor phase; identification of individual electrical components in volts, amperes or watts; motor phase; Btu/h (W) output; and required clearances. 2. Absorption units. Hourly rating in Btu/h (W); minimum hourly rating for units having step or automatic modulating controls; type of fuel; type of refrigerant; cooling capacity in Btu/h (W); and required clearances. 3. Fuel-burning units. Hourly rating in Btu/h(W); type of fuel approved for use with the appliance; and required clearances. 4. Electric comfort heating appliances. Name and trademark of the manufacturer; the model number or equivalent; the electric rating in volts, ampacity and phase; Btu/h (W) output rating; individual marking for each electrical component in amperes or watts, volts and phase; required clearances from combustibles. (Amend Coun. J. 11-8-12, p. 38872, § 318; Amend Coun. J. 9-14-21, p. 35949, Art. III, § 1)

Municipal Code of Chicago § 18-28-301.10 Electrical.

18-28-301.10 Electrical. Electrical wiring, controls and connections to equipment and appliances regulated by this chapter shall be in accordance with Title 14E. (Amend Coun. J. 9-6-17, p. 55278, Art. II, § 62; Amend Coun. J. 9-14-21, p. 35949, Art. III, § 1)

Municipal Code of Chicago § 18-28-301.11 Plumbing connections.

18-28-301.11 Plumbing connections. Potable water supply and building drainage system connections to equipment and appliances regulated by this chapter shall be in accordance with the Chicago Plumbing Code. (Amend Coun. J. 9-14-21, p. 35949, Art. III, § 1)

Municipal Code of Chicago § 18-28-301.12 Fuel types.

18-28-301.12 Fuel types. Fuel-fired appliances shall be designed for use with the type of fuel to which the appliance will be connected and for the altitude at which the appliance is installed. Appliances that are part of a building's mechanical system shall not be converted for use with a different fuel, unless the conversion is approved by the Building Commissioner and the conversion is done in accordance with the manufacturer's instructions. The fuel input rate shall not be increased or decreased beyond the limit rating for the altitude at which the appliance is installed. (Amend Coun. J. 11-13-07, p. 14999, Art. II, § 1; Amend Coun. J. 9-14-21, p. 35949, Art. III, § 1)

Municipal Code of Chicago § 18-28-301.13 Vibration isolation.

18-28-301.13 Vibration isolation. If vibration isolation of equipment or appliances is employed, supplemental restraint shall be used to restrain the equipment or appliance. (Amend Coun. J. 9-14-21, p. 35949, Art. III, § 1)

Municipal Code of Chicago § 18-28-301.14 Repair.

18-28-301.14 Repair. Defective material or parts shall be replaced or repaired in a manner that preserves the original approval or listing. (Amend Coun. J. 9-14-21, p. 35949, Art. III, § 1)

Municipal Code of Chicago § 18-28-301.15 Wind resistance.

18-28-301.15 Wind resistance. Mechanical equipment, appliances and supports exposed to wind shall be designed and installed to resist wind pressures determined in accordance with Chapter 16 of the Chicago Building Code. (Amend Coun. J. 9-14-21, p. 35949, Art. III, § 1)

Municipal Code of Chicago § 18-28-301.16 Flood hazard.

18-28-301.16 Flood hazard. If a structure is located in a flood-hazard zone or a high-hazard zone, its mechanical systems shall be either (1) placed above the base flood elevation; or (2) protected to prevent flood water from entering or accumulating within any equipment, appliances, ducts or plenum space. (Amend Coun. J. 9-14-21, p. 35949, Art. III, § 1)

Municipal Code of Chicago § 18-28-301.17 Rodentproofing.

18-28-301.17 Rodentproofing. Buildings containing rooms or spaces in which people live, sleep or work, or in which feed, food or foodstuffs are stored, prepared, processed, served or sold, shall be constructed to protect against the entrance of rodents in accordance with Section 1210 of the Chicago Building Code. (Amend Coun. J. 9-14-21, p. 35949, Art. III, § 1)

Municipal Code of Chicago § 18-28-301.18 Seismic resistance.

18-28-301.18 Seismic resistance. Where earthquake loads are applicable in accordance with the Chicago Building Code, mechanical system supports, anchorage and bracing shall be designed and installed for seismic forces in accordance with Chapter 16 of the Chicago Building Code. (Amend Coun. J. 9-14-21, p. 35949, Art. III, § 1)

Municipal Code of Chicago § 18-28-302.1 Penetrations of floor/ceiling assemblies and fire-resistance-rated assemblies.

18-28-302.1 Penetrations of floor/ceiling assemblies and fire-resistance-rated assemblies. Penetrations of floor/ceiling assemblies and assemblies required to have a fire-resistance rating shall be protected in accordance with Chapter 7 of the Chicago Building Code. (Amend Coun. J. 4-10-19, p. 100029, Art. XII, § 1; Amend Coun. J. 9-14-21, p. 35949, Art. III, § 2)

Municipal Code of Chicago § 18-28-303.1 General.

18-28-303.1 General. The location of all equipment and appliances shall be governed by the requirements of this section, by specific requirements found elsewhere in this chapter and by the conditions of the equipment and appliance listing. (Amend Coun. J. 9-14-21, p. 35949, Art. III, § 3)

Municipal Code of Chicago § 18-28-303.2 Hazardous locations.

18-28-303.2 Hazardous locations. Appliances shall not be located in any hazardous location unless listed and approved for the specific installation.

Municipal Code of Chicago § 18-28-305.2 Materials.

18-28-305.2 Materials. Pipe hangers and supports shall have sufficient strength to withstand all anticipated static and specified dynamic loading conditions associated with the intended use. Pipe hangers and supports that are in direct contact with piping shall be constructed of materials that are compatible with the piping and do not promote galvanic action.

Municipal Code of Chicago § 18-28-305.3 Structural attachment.

18-28-305.3 Structural attachment. Hangers and anchors shall be attached to the building construction in an appropriate manner consistent with load requirements and manufacturer's recommendations.

Municipal Code of Chicago § 18-28-305.4 Interval of support.

18-28-305.4 Interval of support. Piping shall be either supported at distances not exceeding the spacing specified in Table 18-28-305.4, Piping Support Spacing. Table 18-28-305.4 Piping Support Spacing a Piping Material | Maximum Horizontal Spacing (feet) | Maximum Vertical Spacing (feet) Piping Material | Maximum Horizontal Spacing (feet) | Maximum Vertical Spacing (feet) ABS pipe | 4 | 10 c Aluminum pipe and tubing | 10 | 15 Brass pipe | 10 | 10 Brass tubing, 1 1/4-inch diameter and smaller | 6 | 10 Brass Tubing, 1 1/2-inch diameter and larger | 10 | 10 Cast-iron pipe b | 5 | 15 Copper or copper-alloy pipe | 12 | 10 Copper or copper-alloy tubing, 1 1/4-inch diameter and smaller | 6 | 10 Copper or copper-alloy tubing, 1 1/2-inch diameter and larger | 10 | 10 CPVC pipe or tubing, 1 inch and smaller | 3 | 10 c CPVC pipe or tubing, 1 1/4-inch and larger | 4 | 10 c Steel Pipe | 12 | 15 Steel Tubing | 8 | 10 Lead pipe | Continuous | 4 PB pipe or tubing | 2 2/3 (32 in.) | 4 PEX Tubing | 2 2/3 (32 in.) | 10 c PVC pipe | 4 | 10 c For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm. a See Section 18-28-301.18. b The maximum horizontal spacing of cast-iron pipe hangers shall be increased to 10 feet where 10-foot lengths of pipe are installed. c Mid-story guide. (Amend Coun. J. 9-14-21, p. 35949, Art. III, § 4)

Municipal Code of Chicago § 18-28-305.5 Sway bracing.

18-28-305.5 Sway bracing. Rigid support sway bracing shall be provided at changes in direction greater than 45 degrees (0.8 rad) for pipe sizes 4 inches (102 mm) and larger.

Municipal Code of Chicago § 18-28-306.5 Equipment and appliances on roofs or elevated structures.

18-28-306.5 Equipment and appliances on roofs or elevated structures. If any equipment or appliance requiring access is installed on a roof or elevated structure at a height exceeding 16 feet (4877 mm) above grade plane, a permanent approved means of access shall be provided, and shall extend from grade or floor level to the surface space of the equipment and appliance. Such access shall not require any person to climb over obstructions greater than 30 inches (762 mm) high or walk on roofs having a slope greater than 4 units vertical in 12 units horizontal (33-percent slope).

Municipal Code of Chicago § 18-28-306.6 Sloped roofs.

18-28-306.6 Sloped roofs. If any appliance or equipment is installed on a roof having a slope of 3 units vertical in 12 units horizontal (25-percent slope) or greater and having an edge more than 30 inches (762 mm) above grade at such edge, a level platform shall be provided on each side of the appliance to which access is required in accordance with the manufacturer's installation instructions for service, repair or maintenance.

Municipal Code of Chicago § 18-28-307.1 Fuel-burning appliances.

18-28-307.1 Fuel-burning appliances. The liquid combustion by-products of condensing appliances shall be collected and discharged in accordance with Section 18-28-801, Plumbing. Condensate piping shall be of Type M copper or Schedule 40 PVC and shall not be smaller than the drain connection on the appliance. Such piping shall maintain a minimum horizontal slope in the direction of discharge of not less than one-eighth unit vertical in 12 units horizontal (1 percent slope).

Municipal Code of Chicago § 18-28-307.2 Evaporators and cooling coils.

18-28-307.2 Evaporators and cooling coils. Condensate drain systems shall be provided for all equipment and appliances containing evaporators or cooling coils. Condensate drain systems shall be designed, constructed and installed in accordance with Sections 18-28-307.2.1 through 18-28-307.2.5.

Municipal Code of Chicago § 18-28-307.2.1 Condensate disposal.

18-28-307.2.1 Condensate disposal. Condensate from all cooling coils or evaporators shall be conveyed by gravity, vacuum or pumped from the drain pan outlet to an approved place of disposal as follows: 1. Units larger than 6 tons (21.1 kW) nominal capacity shall discharge to a sanitary sewer drain, storm sewer drain or a French drain constructed in accordance with Section 18-28-307.2.1.1. If condensate is discharged to a sanitary sewer, such drains shall be indirectly connected in accordance with the Chicago Plumbing Code. 2. Units 6 tons (21.1 kW) and smaller nominal capacity shall discharge in accordance with Item 1, or shall discharge to a gutter, roof drain or other approved location. 3. Condensate drains from rooftop units shall discharge in accordance with Item 1 or 2, or shall discharge onto rooftops constructed to prevent the condensate from discharging into a street, alley or other areas so as to cause a nuisance. 4. Condensate may be pumped or conveyed by vacuum as long as no other systems are connected to the condensate removal system. (Amend Coun. J. 9-14-21, p. 35949, Art. III, § 5)

Municipal Code of Chicago § 18-28-307.2.1.1 French drain.

18-28-307.2.1.1 French drain. A french drain shall consist of a pit excavated in the earth not less than 24 inches (610 mm) in any dimension and completely filled with coarse gravel. The drainpipe shall extend into the pit not less than 6 inches (152 mm) below grade and shall be securely anchored in place. The drain shall not be covered with sod until inspected and approved.

Municipal Code of Chicago § 18-28-307.2.2 Drain pipe materials and sizes.

18-28-307.2.2 Drain pipe materials and sizes. All components of the condensate disposal system shall be made of cast iron, galvanized steel, copper, polybutylene, polyethylene, ABS, CPVC or PVC pipe or tubing. All components shall be selected for the pressure and temperature rating of the installation. Condensate waste and drain line size shall be not less than 3/4-inch (19 mm) internal diameter and shall not decrease in size from the drain pan connection to the place of condensate disposal. If the drainpipes for more than one unit are manifolded together for condensate drainage, the pipe or tubing shall be sized in accordance with an approved method. All horizontal sections of drain piping shall be installed in uniform alignment at a uniform slope.

Municipal Code of Chicago § 18-28-307.2.3 Auxiliary drain pans.

18-28-307.2.3 Auxiliary drain pans. Except as provided for in Section 18-28-307.2.4, auxiliary drain pans shall be installed under all coils on which condensation will occur and under units containing coils that are located in attic spaces, suspended ceiling spaces, furred spaces or any area where damage will occur to the building or its contents, as a result of an overflow from the equipment or appliance drain pan or from a stoppage in the condensate drain piping. Auxiliary drain pans shall have a minimum depth of 1 1/2 inches (38 mm), shall be not less than 3 inches (76 mm) larger than the unit or coil dimensions in width and length, and shall be constructed of a corrosion-resistant material. Metallic pans shall have a minimum thickness of not less than 0.0276-inch (0.7 mm) galvanized sheet steel. Nonmetallic pans shall have a minimum thickness of not less than 0.0625 inch (1.6 mm). A separate drain line shall extend from the pan to a conspicuous point and serve as an alarm which indicates that the primary drain is restricted. As an alternative to a separate drain line, an approved water level detector or float switch device shall be used to control overflow by automatically shutting down the equipment or appliance that produces the condensate.

Municipal Code of Chicago § 18-28-307.2.4 Secondary drain system.

18-28-307.2.4 Secondary drain system. If an auxiliary drain pan cannot be installed under units containing cooling coils, a drain pipe shall be connected to the secondary drain (overflow) connection so that the overflowing condensate resulting from flow restrictions in the primary drain pipe will be carried away without damaging the unit and its surroundings. The overflowing condensate shall be drained to a conspicuous point and serve as an alarm which indicates that the primary drain pipe is restricted. As an alternative, overflowing condensate shall be piped to a secondary drain pan, firmly secured and located along the side of the cooling unit, from which the condensate will be drained to a conspicuous point. A secondary drain pan shall have a capacity of not less than the capacity of the condensate drain pan, shall be not less than 1 1/2 inches (38 mm) deep, and shall be constructed of not less than 0.0276-inch (0.7 mm) thick galvanized sheet metal. As an alternative to a separate drain line, a UL-listed water level detector or float switch device shall be used to control overflow by automatically shutting down the equipment or appliance that produces the condensate.

Municipal Code of Chicago § 18-28-308.1 Scope.

18-28-308.1 Scope. This section shall govern the reduction in required clearances to combustible materials and combustible assemblies for chimneys, vents, kitchen exhaust equipment, mechanical appliances, and mechanical devices and equipment.

Municipal Code of Chicago § 18-28-308.2 Listed appliances and equipment.

18-28-308.2 Listed appliances and equipment. The reduction of the required clearances to combustibles for listed and labeled appliances and equipment shall be in accordance with the requirements of this section except that such clearances shall not be reduced if reduction is specifically prohibited by the terms of the appliance or equipment listing.

Municipal Code of Chicago § 18-28-308.3 Protective assembly construction and installation.

18-28-308.3 Protective assembly construction and installation. Reduced clearance protective assemblies, including structural and support elements, shall be constructed of noncombustible materials. Spacers utilized to maintain an airspace between the protective assembly and the protected material or assembly shall be noncombustible. If a space between the protective assembly and protected combustible material or assembly is specified, the same space shall be provided around the edges of the protective assembly and the spacers shall be placed so as to allow air circulation by convection in such space. Protective assemblies shall not be placed less than 1 inch (25 mm) from the mechanical appliances, devices or equipment, regardless of the allowable reduced clearance.

Municipal Code of Chicago § 18-28-308.4 Allowable reduction.

18-28-308.4 Allowable reduction. The reduction of required clearances to combustible assemblies or combustible materials shall be based on the utilization of a reduced clearance protective assembly in accordance with Section 18-28-308.5 or 18-28-308.6.

Municipal Code of Chicago § 18-28-308.5 Labeled assemblies.

18-28-308.5 Labeled assemblies. The allowable clearance reduction shall be based on an approved reduced clearance protective assembly that has been tested and bears the label of a nationally- recognized listing agency.

Municipal Code of Chicago § 18-28-308.6 Reduction table.

18-28-308.6 Reduction table. The allowable clearance reduction shall be based on one of the methods specified in Table 18-28-308.6, Clearance Reduction Methods. If required clearances are not listed in Table 18-28-308.6, the reduced clearances shall be determined by linear interpolation between the distances listed in the table. Reduced clearances shall not be derived by extrapolation below the range of the table. Table 18-28-308.6 Clearance Reduction Methods Type of Protective Assembly a | Required Clearance to Combustibles with Protection (Inches) a Horizontal Combustible Assemblies Located Above the Heat Source | Horizontal Combustible Assemblies Located Beneath the Heat Source and All Vertical Combustible Assemblies Required clearance to combustibles without protection (inches) a | Required clearance to combustibles without protection (inches) a 36 | 18 | 9 | 6 | 36 | 18 | 9 | 6 Type of Protective Assembly a | Required Clearance to Combustibles with Protection (Inches) a Horizontal Combustible Assemblies Located Above the Heat Source | Horizontal Combustible Assemblies Located Beneath the Heat Source and All Vertical Combustible Assemblies Required clearance to combustibles without protection (inches) a | Required clearance to combustibles without protection (inches) a 36 | 18 | 9 | 6 | 36 | 18 | 9 | 6 Galvanized sheet metal minimum nominal thickness of 0.024 inch (No. 24 Gauge), spaced 1 inch off the combustible assembly | 18 | 9 | 5 | 3 | 12 | 6 | 3 | 3 Galvanized sheet metal minimum nominal thickness of 0.024 inch (No. 24 Gauge), spaced 1 inch off the combustible assembly | 18 | 9 | 5 | 3 | 12 | 6 | 3 | 2 Two layers of galvanized sheet metal, minimum nominal thickness of 0.024 inch (No. 24 Gauge), having a 1-inch airspace between layers, spaced 1 inch off the combustible assembly | 18 | 9 | 5 | 3 | 12 | 6 | 3 | 3 Two layer of galvanized sheet metal, minimum nominal thickness of 0.024 inch (No. 24 Gauge), having 1-inch of fiberglass insulation between layers, spaced 1 inch off the combustible assembly | 18 | 9 | 5 | 3 | 12 | 6 | 3 | 3 0.5-inch inorganic insulating board, over 1 inch of fiberglass or mineral wool batt, against the combustible assembly | 24 | 12 | 6 | 4 | 18 | 9 | 5 | 3 3.5-inch brick wall, spaced 1 inch off the combustible assembly | – | – | – | – | 12 | 6 | 6 | 6 3.5-inch brick wall, against the combustible wall | – | – | – | – | 24 | 12 | 6 | 5 For SI: 1 inch = 25.4 mm, °C = [(°F)-32]/1.8, 1 lb. per cubic foot = 16.02 kg/m 3 , 1.0 (Btu x in.)/(sq. ft. x hr x °F.) = 0.144 W/m 2 x K. a Mineral wool batts (blanket or board) shall have a minimum density of 8 pounds per cubic foot and a minimum melting point of 1,500°F. Insulation material utilized as part of a clearance reduction system shall have a thermal conductivity of 1.0 (Btu x in.)/(sq. ft. x hr. x °F.) or less. Insulation board shall be of noncombustible material.

Municipal Code of Chicago § 18-28-308.7 Solid fuel-burning appliances.

18-28-308.7 Solid fuel-burning appliances. The clearance reduction methods specified in Table 18-28-308.6 shall not be used to reduce the clearance required for solid fuel-burning appliances that are labeled for installation with clearances of 12 inches (305 mm) or less. If appliances are labeled for installation with clearances greater than 12 inches (305 mm), the clearance reduction methods of Table 18-28-308.6 shall not reduce the clearance to less than 12 inches (305 mm).

Municipal Code of Chicago § 18-28-308.8 Masonry chimneys.

18-28-308.8 Masonry chimneys. The clearance reduction methods specified in Table 18-28-308.6 shall not be used to reduce the clearances required for masonry chimneys as specified in Article 8 of this chapter and Chapter 21 of the Chicago Building Code. (Amend Coun. J. 4-10-19, p. 100029, Art. XII, § 2; Amend Coun. J. 9-14-21, p. 35949, Art. III, § 6)

Municipal Code of Chicago § 18-28-308.9 Chimney connector pass-throughs.

18-28-308.9 Chimney connector pass-throughs. The clearance reduction methods specified in Table 18-28-308.6 shall not be used to reduce the clearances required for chimney connector pass-throughs as specified in Section 18-28-803.10.4, "Connector pass-through."

Municipal Code of Chicago § 18-28-308.10 Masonry fireplaces.

18-28-308.10 Masonry fireplaces. The clearance reduction methods specified in Table 18-28-308.6 shall not be used to reduce the clearances required for masonry fireplaces as specified in Article 8 of this chapter and Chapter 21 of the Chicago Building Code. (Amend Coun. J. 9-14-21, p. 35949, Art. III, § 6)

Municipal Code of Chicago § 18-28-308.11 Kitchen exhaust ducts.

18-28-308.11 Kitchen exhaust ducts. The clearance reduction methods specified in Table 18-28-308.6 shall not be utilized to reduce the minimum clearances required by Section 18-28-506.3.12, Fire-resistive access opening, for kitchen exhaust ducts enclosed in a shaft.

Municipal Code of Chicago § 18-28-309.1 General.

18-28-309.1 General. Temperature control for interior spaces shall be provided in accordance with Section 1203 of the Chicago Building Code. (Amend Coun. J. 9-14-21, p. 35949, Art. III, § 7)

Municipal Code of Chicago § 18-28-310.1 General.

18-28-310.1 General. Structures occupied for purposes involving explosion hazards shall be provided with explosion control where required by the Chicago Fire Prevention Code. (Amend Coun. J. 9-14-21, p. 35949, Art. III, § 8)

Municipal Code of Chicago § 18-28-311.1 General.

18-28-311.1 General. Buildings shall be provided with smoke and heat vents or mechanical smoke removal systems where required by the Chicago Building Code. (Amend Coun. J. 9-14-21, p. 35949, Art. III, § 9)

Municipal Code of Chicago § 18-28-312.1 Load calculations.

18-28-312.1 Load calculations. Heating and cooling system design loads for the purpose of sizing systems shall be determined in accordance with the procedures described in ASHRAE/ACCA Standard 183. Alternatively, design loads shall be determined by an approved equivalent computation procedure using the design parameters specified in Chapter 3 [CE] of the Chicago Energy Conservation Code. (Amend Coun. J. 9-14-21, p. 35949, Art. III, § 10)
Source: City of Chicago, Municipal Code of Chicago (American Legal Publishing, codelibrary.amlegal.com)URL: https://codelibrary.amlegal.com/codes/chicago/latest/chicago_il/0-0-0-2686701Fetched: 10/24/2026

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