This is a list of all Mandatory Provisions listed within different sections of ASHRAE 90.1-2007

This article begins with a brief outline of the document, and then provides an extended outline of all Mandatory Provisions (included in sections 5-9) for review and comprehension. For a full breakdown of the Mandatory Provisions, consult the full document – especially for exceptions which are given for almost every section but not included here.

ASHRAE 90.1-2007 Document Outline

Section 1 – Purpose (page 4)
Section 2 – Scope (page 4)
Section 3 – Definitions, Abbreviations, and Acronyms (page 4)
Section 4 – Administration and Enforcement (page 15)
Section 5 – Building Envelope (page 17)
Section 6 – Heating, Ventilating, and Air Conditioning (page 30)
Section 7 – Service Water Heating (page 55)
Section 8 – Power (page 58)
Section 9 – Lighting (page 58)
Section 10 – Other Equipment (page 65)
Section 11 – Energy Cost Budget Method (page 66)
Section 12- Normative References (page 74)

ASHRAE 90.1-2007 – Summary of Mandatory Provisions

5.1 Building Envelope

5.4 Mandatory Provisions

5.4.1 Insulation. Where insulation is required in Section 5.5 or 5.6, it shall comply with the requirements found in Sections through

5.4.2 Fenestration and Doors. Procedures for determining fenestration and door performance are described in Section 5.8.2. Product samples used for determining fenestration performance shall be production line units or representative of units purchased by the consumer or contractor

6.1 New Buildings – Heating, Ventilating, and Air Conditioning

6.4 Mandatory Provisions
6.4.1 Equipment Efficiencies, Verification, and Labeling Requirements Minimum Equipment Efficiencies-Listed Equipment-Standard Rating and Operating Conditions.

  • Equipment shown in Tables 6.8.1A through 6.8.1G shall have a minimum performance at the specified rating conditions when tested in accordance with the specified test procedure.
  • Where multiple rating conditions or performance requirements are provided, the equipment shall satisfy all stated requirements, unless otherwise exempted by footnotes in the table.
  • Equipment covered under the Federal Energy Policy Act of 1992 (EPACT) shall have no minimum efficiency requirements for operation at minimum capacity or other than standard rating conditions.
  • Equipment used to provide water heating functions as part of a combination system shall satisfy all stated requirements for the appropriate space heating or cooling category.
  • Tables are as follows:

a. Table 6.8.lA-Air Conditioners and Condensing Units
b. Table 6.8.lB-Heat Pumps
c. Table 6.8.1 C-Water-Chilling Packages
d. Table 6.8.10-Packaged Terminal and Room Air Conditioners and Heat Pumps
e. Table 6.8.1E-Fumaces, Duct Furnaces, and Unit Heaters
f. Table 6.8. IF-Boilers
g. Table 6.8.1 G-Reat Rejection Equipment All furnaces with input ratings ofz65 kW, including electric furnaces, that are not located within the conditioned space shall have jacket losses not exceeding 0.75% of the input rating Minimum Equipment Efficiencies-Listed Equipment-Nonstandard Conditions. Water-cooled centrifugal water-chilling packages that are not designed for operation at ARI Standard 550/590 test conditions shall have a minimum full-load COP and a minimum NPLV rating as shown in the tables 6.8.1H, 6.8.1I and 6.8.1.J.

a. Centrifugal chillers <528 kW shall meet the minimum full-load COP and IPLV/NPLY in Table 6.8.1H.
h. Centrifugal chillers z528 kW and <1055 kW shall meet the minimum full-load COP and IPLY /NPLV in Table 6.8.1I.
c. Centrifugal chillers zl055 kW shall meet the minimum full-load COP and IPLV/NPLY in Table 6.8.l1. Equipment Not Listed. Equipment not listed in the tables referenced in Sections and may be used. Verification of Equipment Efficiencies. Equipment efficiency information supplied by manufacturers shall be verified. Labeling Mechanical Equipment. Mechanical equipment that is not covered by the U.S. National Appliance Energy Conservation Act (NAECA) of 1987 shall carry a permanent label installed by the manufacturer stating that the equipment complies with the requirements of Standard 90.1. Packaged Terminal Air Conditioners. Packaged terminal air conditioners and heat pumps with sleeve sizes less than 0.4 m high and 1.0 m wide shall be factory labeled.
6.4.2 Load Calculations. Heating and cooling system design loads for the purpose of sizing systems and equipment shall be determined in accordance with generally accepted engineering standards and handbooks acceptable to the adopting authority (for example, ASHRAE Handbook-Fundamentals).
6.4.3 Controls Zone Thermostatic Controls General. The supply of heating and cooling energy to each zone shall be individually controlled by thermostatic controls responding to temperature within the zone. Dead Band. Where used to control both heating and cooling, zone thermostatic controls shall be capable of providing a temperature range or dead band of at least 3°C within which the supply of heating and cooling energy to the zone is shut off or reduced to a minimum. Setpoint Overlap Restriction. Where heating and cooling to a zone are controlled by separate zone thermostatic controls located within the zone, means (such as limit switches, mechanical stops, or, for DOC systems, software programming) shall be provided to prevent the heating setpoint from exceeding the cooling setpoint minus any applicable proportional band. Off-Hour Controls. HVAC systems shall have the off-hour controls. Automatic Shutdown. HVAC systems shall be equipped with at least one of the following:

a. Controls that can start and stop the system under different time schedules for seven different day-types per week, are capable of retaining programming and time setting during loss of power for a period of at least ten hours, and include an accessible manual override, or equivalent function, that allows temporary operation of the system for up to two hours.
b. An occupant sensor that is capable of shutting the system off when no occupant is sensed for a period of up to 30 minutes.
c. A manually operated timer capable of being adjusted to operate the system for up to two hours.
d. An interlock to a security system that shuts the system off when the security system is activated. Setback Controls. Heating systems located in climate zones 2-8 shall be equipped with controls that have the capability to automatically restart and temporarily operate the system as required to maintain zone temperatures above a heating setpoint adjustable down to l3°C or lower. Optimum Start Controls. Individual heating and cooling air distribution systems with a total design supply air capacity exceeding 5000 Lis, served by one or more supply fans, shall have optimum start controls. Zone Isolation. HVAC systems serving zones that are intended to operate or be occupied non- simultaneously shall be divided into isolation areas. Stair and Shaft Vents. Stair and elevator shaft vents shall be equipped with motorized dampers that are capable of being automatically closed during normal building operation and are interlocked to open as required by fire and smoke detection systems. Gravity Hoods, Vents, and Ventilators. All outdoor air supply and exhaust hoods, vents, and ventilators shall be equipped with motorized dampers that will automatically shut when the spaces served are not in use. Shutoff Damper Controls. Both outdoor air supply and exhaust systems shall be equipped with motorized dampers that will automatically shut when the systems or spaces served are not in use. Dampers. Where outdoor air supply and exhaust air dampers are required by Section, they shall have a maximum leakage rate when tested in accordance with AMCA Standard 500 as indicated in Table Ventilation Fan Controls. Fans with motors greater than 0.5 kW shall have automatic controls complying with Section that are capable of shutting off fans when not required. Heat Pump Auxiliary Heat Control. Heat pumps equipped with internal electric resistance heaters shall have controls that prevent supplemental heater operation when the heating load can be met by the heat pump alone during both steady-state operation and setback recovery. Supplemental heater operation is permitted during outdoor coil defrost cycles. Humidifier Preheat. Humidifiers with preheating jackets mounted in the airstream shall be provided with an automatic valve to shut offpreheat when humidification is not required. Humidification and Dehumidification. Where a zone is served by a system or systems with both humidification and dehumidification capability, means (such as limit switches, mechanical stops, or, for DDC systems, software programming) shall be provided capable of preventing simultaneous operation of humidification and dehumidification equipment. Freeze Protection and SnowlIce Melting Systems. Freeze protection systems, such as heat tracing of outdoor piping and heat exchangers, including self-regulating heat tracing, shall include automatic controls capable of shutting off the systems when outdoor air temperatures are above 4.4 °C or when the conditions of the protected fluid will prevent freezing. Ventilation Controls for High-Occupancy Areas. Demand control ventilation (DeV) is required for spaces larger than 50 m2 and with a design occupancy for ventilation of greater than 40 people per 100 m2 of floor area and served by systems with one or more of the following:

a. an air-side economizer
b. automatic modulating control of the outdoor air damper
c. a design outdoor airflow greater than 1400 Lis

6.4.4 HVAC System Construction and Insulation Insulation General. Insulation required by this section shall be installed in accordance with industry-accepted standards (see Informative Appendix E). These requirements do not apply to HVAC equipment. Insulation shan be protected from damage, including that due to sunlight, moisture, equipment maintenance and wind. Duct and Plenum Insulation. All supply and return ducts and plenums installed as part of an HVAC air distribution system shall be thermally insulated in accordance with Tables 6.S.2A and 6.S.2B. Piping Insulation. Piping shall be thermally insulated in accordance with Table 6.S.3. Duct Leakage Tests. Ductwork that is designed to operate at static pressures in excess of 750 Pa shall be leak-tested according to industry-accepted test procedures (see Infonnative Appendix E). Representative sections totaling no less than 25 % of the total installed duct area for the designated pressure class shall be tested.

7.1 Service Water Heating for New Buildings. Service water heating systems and equipment shall comply with the requirements of this section.

7.4 Mandatory Provisions
7.4.1 Load Calculations. Service water heating system design loads for the purpose of sizing systems and equipment shall be determined in accordance with manufacturers’ published sizing guidelines or generally accepted engineering standards and handbooks acceptable to the adopting authority.

7.4.2 Equipment Efficiency. All water heating equipment, hot-water supply boilers used solely for heating potable water, pool heaters, and hot-water storage tanks shall meet the criteria listed in Table 7.8. Where multiple criteria are listed, aU criteria shall be met.

7.4.3 Service Hot-Water Piping Insulation. The following piping shall be insulated to levels shown in Section 6, Table 6.8.3.

7.4.4 Service Water Heating System Controls Temperature Controls. Temperature controls shall be provided that allow for storage temperature adjustment from 49°C or lower to a maximum temperature compatible with the intended use. Temperature Maintenance Controls. Systems designed to maintain usage temperatures in hot-water pipes, such as recirculating hot-water systems or heat trace, shall be equipped with automatic time switches or other controls that can be set to switch off the usage temperature maintenance system during extended periods when hot water is not required. Outlet Temperature Controls. Temperature controlling means shal1 be provided to limit the maximum temperature of water delivered from lavatory faucets in public facility restrooms to 43°C. Circulating Pump Controls. When used to maintain storage tank water temperature, recirculating pumps shall be equipped with controls limiting operation to a period from the start ofthe heating cycle to a maximum of five minutes after the end of the heating cycle.

7.4.5 Pools Pool Heaters. Pool heaters shall be equipped with a readily accessible ON/OFF switch to allow shutting off the heater without adjusting the thermostat setting. Pool heaters fired by natural gas shall not have continuously burning pilot lights. Pool Covers. Heated pools shall be equipped with a vapor retardant pool cover on or at the water surface. Pools heated to more than 32°C shall have a pool cover with a minimum insulation value ofR-2.1. Time Switches. Time switches shall be installed on swimming pool heaters and pumps.

7.4.6 Heat Traps. Vertical pipe risers serving storage water heaters and storage tanks not having integral heat traps and serving a nonrecirculating system shall have heat traps on both the inlet and outlet piping as close as practical to the storage tank. A heat trap is a means to counteract the natural convection of heated water in a vertical pipe run.

8.1 Building Power Distribution Systems

8.4 Mandatory Provisions
8.4.1 Voltage Drop Feeders. Feeder conductors shall be sized for a maximum voltage drop of 2% at design load. Branch Circuits. Branch circuit conductors shall be sized for a maximum voltage drop of 3% at design load.
8.5 Prescriptive Path (Not Used)
8.6 Alternative Compliance Path (Not Used)
8.7 Submittals

8.7.1 Drawings. Construction documents shall require that within 30 days after the date of system acceptance, record drawings of the actual installation shall be provided to the building owner, including

a. a single-line diagram of the building electrical distribution system and
b. floor plans indicating location and area served for all distribution.

8.7.2 Manuals. Construction documents shall require that an operating manual and maintenance manual be provided to the building owner. The manuals shall include, at a minimum, the following:

a. Submittal data stating equipment rating and selected options for each piece of equipment requiring maintenance.
b. Operation manuals and maintenance manuals for each piece of equipment requiring maintenance. Required routine
maintenance actions shall be clearly identified.
c. Names and addresses of at least one qualified service agency.
d. A complete narrative of how each system is intended to operate.

9.1 Lighting Systems and Equipment

9.4 Mandatory Provisions
9.4.1 Lighting Control Automatic Lighting Shutoff. Interior lighting in buildings larger than 465 m2 shall be controlled with an automatic control device to shut off building lighting in all spaces. Space Control. Each space enclosed by ceiling height partitions shall have at least one control device to independently control the general lighting within the space. Each manual device shall be readily accessible and located so the occupants can see the controlled lighting. Exterior Lighting Control. Lighting for all exterior applications not exempted in Section 9.1 shall have automatic controls capable of turning off exterior lighting when sufficient daylight is available or when the lighting is not required during nighttime hours.

9.4.2 Tandem Wiring. Luminaires designed for use with one or three linear fluorescent lamps greater than 30 W each shall use two-lamp tandem-wired ballasts in place of single lamp ballasts when two or more luminaires are in the same space and on the same control device.

9.4.3 Exit Signs. Internally illuminated exit signs shall not exceed 5 W per face.

9.4.4 Exterior Building Grounds Lighting. All exterior building grounds luminaires that operate at greater than 100 W shall contain lamps having a minimum efficacy of 60 ImIW unless the luminaire is controlled by a motion sensor or qualifies for one of the exceptions under Section 9.1.1 or 9.4.5.

9.4.5 Exterior Building Lighting Power. The total exterior lighting power allowance for all exterior building applications is the sum of the individual lighting power densities permitted in Table 9.4.5 for these applications plus an additional unrestricted allowance of 5% of that sum.







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