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% ~% -~- 6 i 2-13 ~._ CEI,JTF;.-._' EN4ll~==` ~~' a EXHIBIT 7 G~10 G I~° a Sfandard5 for NATURAL AND MECHANICAL VENTILATION Approved by the American Society of Heating, Refrigerating and AirrConditioning Engineers Inc. Standards Committee January 28, 1973, and Board of Directors by Letter Ballot February 16, 1973: ASH RAE Standards are updated on a five-year cycle;,the date following,the Standard'number is the year of approval. The latest copies may be purchased from the ASHRAE Circulation Sales Department, 345 East'47th Street, New York NY l'0017: Copyright ~~ 1979 ~ C Ti;e Amerieae Scietv ef Heatieg, Heipioeratieg. W aad Rir-caeg6tiaeieg Engiee~OR1rs,lee. 9 N c~

C PROJECT COMMITTEE 62 C Ralph G. Nevins, Chairman Paul M. Engle Albert S. Gates, Jr. Peter B. Gordon Richard L. Kuehner Preston E. McNall, Jr. Richard D. Rivers Kenneth E. Robinson Sam P. Soling David J. Sutton Warren Viessman George S. Yamamoto, ($tds. Committee Liaison) 1972-1973 STANDARDS COMMITTEE Raymond Cohen, Chairman - George S. Yamamoto, Vice Chairman Edward A. Cruse J. Barrie Graham Richmond S. Hayes, Jr. Kenneth L. Lamm Metin Lokmanhekim Ralph G. Nevins Joseph Frederick J. Reed Joseph K. Thornton Jack E. Tumilty G. Harold West John t. Woodworth D. Loveley, ExO, BOD William J. Collins, Jr., (Coordinating Officer, BOD) Nicholas A. La Courte, Director of Standards 1973-1974 STANDARDS COMMITTEE George S. Yamamoto, Chairman Richmond S. Hayes, Jr., Vice Chairman Edward A Cruse Herbert T. Gilkey J. Barrie Graham Tamami Kusuda Kenneth L. Lamm Robert F. Logsdon Metin Lokmanhekim Joseph D. Loveley John P. Slattery Leon J. Taub Lloyd L. Wallstrom John I. Woodworth Don J. Massa, ExO, BOD William J. Collins, Jr., ExO, BOD Nicholas A. La Courte, Director of Standards FOREWORD This Standard was prepared under the auspices of the American Society of Heating, Refrigerating and Air-Conditioning Engineers. It may be used, in whole or in part, by any association or government agency with due credit to the American Society of Heating, Refrigerating and Air-Conditioning Engineers. Adherence is strictly on a voluntary basis and merely in the interest of obtaining uniform standards throughout the industry. Ratings published as conforming to this Standard must comply with the publication provisions stated herein. ASHRAE INDUSTRIAL ADVERTISING POLICY ON STANDARDS ASHRAE Standards are established to assist industry and the public by offering a uniform method of testing equipment for rating purposes, by suggesting safe practices in designing and installing such equipment, by providing proper defini~ tions of this equipment and by providing other information iwh ich may serve to guide the industry. The creation of ASHRAE Standards is determined by the need for them; and conformance to them is completely voluntary. In referring to this standard and in marking of equipment and in advertising, no claim shall be made, either stated or implied, that the product has been approved by ASH RAE. The following form of statement should be used: A representative product sample of the ...................... model, has been tested in accordance with ASH RAE Standard 62-73. ASHRAE STANDARD 62-73 v

CONTENTS Section Page 1 Purpose and Scope ................................................ 3 2 Definitions ...................................................... 3 3 Acceptable Ventilation Air Quality .................................... 4,5 4 Ventilating~Systems-General Requirements ............................. 5 5 Recirculation .................................................... 5 6 Ventilation Requirements ........................................... . .5-17 ASHRAE STANDARD 62-73 1

C INTRODUCTION The importance and confusion regarding the need for venrilation standards is evidenced by the existence of such standards in numerous building codes since the early 1900's and, at' the same time, the diverse and often conflicting~specifications. In 1965, ASHRAE was invited to participate in the revision and updating of ASA Standard A53.1, Light and Ventilation, dated' May 23, 1946. Responsibility for the Mechanical Ventilation Section of this Standard was assigned to an ASHIRAE Project Committee appointed in 1966. With the reorganization of ASA (now ANSI)', and a change in its procedures, the A53 Committee became inactive; at the instructions of the ASHRAE Standards Committee, the Project Committee was advise& to continue its efforts and develop an ASHRAE Standard'. To meet its responsibility, the Project Committee undertook an extensive program to obtain input from all segments of industry, the public, and ASHRAE members. A comprehensive review and comparison of ventilation codes was undertaken to aid' the Committee in its formulation and standardization of definitions and recommendations. An article in the ASHRAE JOURNAL and a press release to the trade press solicited opinions, comments and suggestions. An, open forum was held at the ASHRAE Semi- annual Meeting in Chicago, January 1969. Interest was high, and considerable information was obtained for guidance of the Project Committee. Following Project Committee acceptance of the eighth draft, the proposed Standard was submitted to an additional review by ASH RAE members and representatives from industry and government prior to approval by the Standards Committee and'ASHIRAE's Board of Directors. The Standard recommends ventilation rates based upon the best available scientific and technical knowledge. It also incorporates, for the first time, a quantitative definition of "acceptable outdoor air" and specifies conditions under which the amount of outdoor air may be reduced, thereby taking advantage of advancements in air cleaning technolbgy. The Committee wishes to thank all those who submitted comments and suggestions and wishes it to be known that each reviewer's comment received'serious consideration and in many cases was incorporated into this final document. Further comments are welcome and should be sent to the ASHRAE Director of Standards, 2 ASHRAE STANDARD 62-73 M

1 C STANDARDS FOR NATURAL AND MECHANICAL VENTILATION SECTION 1.0 PURPOSE AND SCOPE. This standard* defines ventilationi requirements for spaces intended for human occupancy and specifies minimum and recommended ventilation air quantities for the preservation of the occupants' health, safety, and well-being. Good ventilation practice exists when clean ventila- tion air is provided in sufficient quantities to maintaini the required oxygen, carboni dioxide, and other air quality levels in the space under consideration. The standard does not specify the air quantities required for the control of temperature and humidity or the exhaust quantities required for source cont'fol' of domestic or industrial wastes. The specifications aree based on the current state of knowledge and acceptable practice related to air filtration, odor control and en- vironmental physiolQgy. •Replaces the ventilation sectiom of ASA Standard A53.1 dated May 23, 1946. SECTION 2.0 DEFINITIONS (SEE FIG. 1) 2.1 AIR CLEANER: a device capable of removing airborne impurities such as dusts, gases, vapors, fumes and smokes. ALTERNATE AIR CLEANER LOCATION r.-.1. -4 f OUTOGOR- I I AIR, ' I 1 -4 ~- L_J r-r AIR CLEANER r-i , ~VENTILATING AIR C 2.2 AIR CONDITIONING: the process of treating air to meet the requirements of the conditione& space by controlling simultaneously its temperature, humidity, cleanliness, and distribution. 2.3 AIR, EXHAUST: air removed from a space and not reused. 2.4 AIR, OUTDOOR: air taken from outdoors and therefore not previously, circulated through~the system. 2.5 AIR, RECIRCULATED: return air again supplied to a space. 2.6 AIR, RETURN: air removed from a space and recirculated or exhausted. 2.7 AIR, SUPPLY: that air delivere& to each or any space in the system, or the total delivered to all spaces in the system, which is used for ventilation, heating, cooling, humidification, dehumidification, distribution, etc. 2.8 AIR, VENTILATION: that portion of supply air which comes from outside (outdoors) plus any recircu- lated air that has beeni treated to maintain the desired quality of air within a designated space. (See Section 3.0). 2.9 EXFILTRATION: air flow outward through cracks and interstices, around windows and doors, and through floors and walls of a space or building. 2.10 INFILTRATION`' the inward air leakage through cracks and interstices, aroun& windows and doors, and! through floors and walls of a space or building. INFILTRATION EXFILTRATION X SUPPLY - EXHAUST CONDITIONED SPACE ALTERNATE ~-AIR' CLEANER' / LOCATION r ~~ i r L --- ~ L -- ~ ~ ASHRAE STANDARD 62-73 1 RECIRCULATED Fig, 1 Diagram of'Definitions t W ALTERNATE EXHAUST 3

C 2.11 MECHANICAL EXHAUST SYSTEM: a system for removing air from a room or space by mechanical means. 2.12 MECHANICAL SUPPLY SYSTEM: a system for forcing air into a room or space by mechanical!means. 2.13 NATURAL VENTILATION!: the movement of air into and out of a space through intentionally provided openings, such as windows and doors, or through non- powered ventilators. 2.14 VENTILATION: the process of supplying ventila- tion air to any space by natural or mechanical means. (Provision must be made for simultaneous removal of air from the space.) SECTION 3.0. ACCEPTABLE VENTILATION AIR QUALITY (SEE BIBLIOGRAPHY) 3.1 TABLE I list's the maximum allowable pollutant concentrations in ventilation air commensurate with the ventilation requirements set forth in Section 6.0 of this Standardl In addition ventilation air shall conform to the limiting conditions given in Section 3.3. 3.2 OUTDOOR AIR shall be considered of that quality which meets or exceeds the criteria of Table I if one of the following conditions is met: C 3.2.1 Monitoring Data of governmental pollut'iom control agencies such as the National Air Pollution Control Administration show that the air quality of the community ini which the ventilation system is located meets the requirements of Table I'; 3.2.2 The Community in which the ventilation sys- tem is located is similar in population, geographic and meteorological setting and industrial pattern to a com- munity having acceptable air quality as determined in paragraph 3'.2.1;, 3.2.3 The Community in, which the ventilation sys- tem is located has a population of less than 20;000 people, and no nearby substantial contamination source; 3.2.4 Air Monitoring, for three consecutive months, as required for inclusion in the NAPCA-SORAD Sys- tem, shows that the air quality meets the requirements of Table I. 3.3 AIR shall be considered unacceptable for ventilal tion use in accordance with this standard if it contains any, contaminant in, a concentration greater than one- tenth the Threshold Limit Value (TLV) currently ac- cepted by the American Conference of Governmental Industrial Hygienists. Where there is reasonable ex- pectation that the air is unacceptable, as indicated above, sampling and analysis shall be carried out by qualified personnel in accordance with procedures and equipment acceptable to the American Conference of Table I Maximum Allowable Contaminant Concentrations for Ventilation Air 4 Annual Average Short-Term,Leve1 (Arithmetic3Mean) "(Not to be exceeded Contaminant µg/m More than once a Year)iµg/m 3 Averaging Period (hr) Particulates 60* 150* 24 Sulfur Oxides 80 400 24 CarboniMonoxide 20;000 30,000 8 Phot'ochemicalOxidant 100, 500 1 Hydrocarbons (not including methane) 1,800 4,000' 3 Nitrogen Oxides 200: 500 24 Odor Essentially Unobjectionable* * •Federal'criteria for US. by 1975. "Judged unobjectionable by 60`70 of a panel of 10 untrained subjects. The levels listed are met by ambient outdoor air in many major cities, or will be met by such outdoor air when passed through minimal air treatment systems (containing suitable combinations of heaters; coolers, humidifiers, etc., and including roughing particulate filters). Conformity of users' local air to these concentrations may be determined by reference to the Storage and Retrieval of Aerometric Data System~ (SORAD) of the National Air Pollution Control Administration; and by other means„ as listed in Section 3.2. ASHRAE STANDARD 62-73 ~

C Governmental' Industrial Hygienists, the American In} dustrial Hygiene Association or the Occupational Health Section of the U.S. Public Health Service. 3.4 IF OUTDOOR AIR of the quality specified by Sections 3.1 and 3.3 is not available, filtration or other treatment devices shall be used to bring its quality to or above the minimum level defined by Sections 3A and 3.3. 3.5 ACCEPTABLE VENTILATIONAIR may contain~ a mixture of suitably treated recirculated' air and out- door air such that the mixture meets or exceeds the quality limits stated in 3.1 and 3.3 (See Section 5.0). SECTION 4.0. VENTILATING SYSTEMS- GENERAL REQUIREMENTS 4.1 VENTILATING SYSTEMS shall be provided with adequate openings for supply, return and exhaust air to obtain the required circulation. 4.2 OUTDOOR AIR INLETS shall be located to mini- mize or eliminate possible contamination. 4.3 EXHAUST DISCHARGES shall be located so that the air exhausted to the outside does not create a nuisance or contaminate outdoor air, near outdoor air inlets. 4.4 VENTILATING' SYSTEMS shall be designed and! installed so that the air coming in contact with occu- pants is at a temperature, velocity and quality not t'oo constitute a health hazard or discomfort. 4.5 VENTILATING DUCTS shall be constructed en- tirely of incombustible, nonporous materials. Their construction shalli comply with the standards of air conditioning and ventilating systems of the National Fire Protective Association (Pamphlets NFPA No. 90A and' NFPA No. 90B). 4.6 OCCUPIED SPACES shall be provided with means of supplying sufficient ventilation, air for fhemaximum number of persons for which such spaces are designed. 4.7 TIflS STANDARD assumes that contaminants from concentrated sources which can be a potential hazard or nuisance (heat, smoke, fumes, etc.) are col- lected as close as possible to the source by exhaust systems separate from the space ventilating system. \ 4.8 WHEN! SPECIAL EXHAUSTS are used (as in~ the kitchen), consideration~ must! be given to provide ade- quate supply air to the space to replace the exhaust air. SECTION 5.0. RECIRCULATION The requirements for ventilation quantities given in Section 6.0 are for 100% outdoor air when~ the outdoor air meets the specifications for air quality given in Section 3.0. Except' for areas where recirculation is prohibited by other codes or standards having prece- denee,, the outdoor air requirements may be reduced to 33% of the specified required ventilation air quantity if adequate temperature control is provided, in addition to filtering equipment, so that the maximum allow- able concentration of particulates entering the space is less than that specified in Table I. If, in addition, high efficient adsorption or other odor and gas removal equipment is employed, so that' the air entering the space has been purified to meet the requirements of Sections 3.1 and 3.3, the outdoor air requirement may be reduced to 15% of the specified required ventilatiom air quantity. In no case shall the outdoor air quantity be less than 5 cfm per person. SECTION 6.0. VENTILATION REQUIREMENTS The required air quantities are for outdoor air meet- ing the requirements of Section 3.0 or for a combina- tion of acceptable outdoor air and recirculated air in accordance with Section 5.0. Minimum and recom- mend'ed' values are given to provide different qual- ity levels in recognition of the need to provide choices of environmental performance for different classes of projects. In either case the designer is en- couraged to use his experience and judgment in the application~ of this Standard as long as the minimum requirements are satisfied. In many cases the required ventilation air quantities for spaces with positive exhaust systems, such as toilets, baths, lobbies, corridors, and kitchens, may be supplied from~ adjacent' spaces. The sum of the ventila- tion requirements for the space and the adjacent space shall be provided. O 40 W Clt ASHRAE STANDARD 62-73 5

Estimated persons/, 1000 sq ft floor area. Use only whem design oc- cupancy is not known `. Single Unit Dwellings General Living Areas, Bedrooms Kitchens Baths, Toilet Rooms Basements, Utility Rooms Multiple Unit Dwellings General Living Areas, Bedrooms Kitchens Baths, Toilet Rooms Basements, Utility Rooms Garages Mobile Homes 'lnstalled capacity for intermittent use. •*cfm per sq ft of floor, area. General Requi'rements-Merchandising (Apply to all forms unless specially noted) Sales Floors and Showrooms (Basement and Street Floors) Sales'Floor and Showrooms (Upper Floors) Storage Areas (Serving Sales Floors and Storerooms) Dressing Rooms Malls and Arcades Shipping and Receiving Areas Warehouses Elevators Food Markets„Supermarkets, etc: Meat Processing Rooms Required ventilation air, cubic feet per minute per human occupant, (when the number is bracketed, refer to the notes). Minimum 6.1. RESIDENTIAL (Private dwelling places, single or multiple units) 5 6.2. COMMERCIAL 30 I I 20 40 10 5 10 Recommend'ed~ Comments 5 7-10 20 30-50 * 20 30-50 * 5 5 5 7-10 20 30-50 * 20 30-50 * 5 7-10 (1.5). (2.0)-(3.0) 5 7-1 0 7 10-15 7 10-15 5 7-10' 7 10-15 7 10-15 15 15-20 7' 10-15. 7 1"0-15. 5 5 * •Spaces maintainedi at low temperatures (-1!0 to 50 F) are not covered by these requirements unless the occupancy is continuous. Ventilation from adjoining spaces is permissible. When the occupancy is intermittent, infiltration will normally exceed the ventilation requirement. (See Chapter 23, Refrigeration Load, ASHRAE Handbook of Fundamentals, 1972); Drug Stores Pharmacists' Work Rooms 10 20 25-30 Specialty Shops Pa Shops (1.0). (1.5)-(2,0) * Flo i t 10 5 7 * * r s s Greenhouses 1 5 7-10 ** •cfm per sq ft of floor area ••Maximum allowable concentration (MA:C),for sulfur dioxide = 30 µg/eu m •''Ventilation to optimize plant growth, temperature, humidity; etc., will almost always be greater than shown. 6 ASHRAE STANDARD 62-7 3 is

Banks (see sales floors and offices Vaults Food Services Dining Rooms Kitchens Cafeterias, Short-Order, Drive-Ins, Seating Areas, and Queuing Areas Bars (Predominantly Stand-up) Cocktaili Lounges *Exhaust to outside; source control'as required. Hotels, Motels, Resorts Bedrooms (Single, Doublr;). Living Rooms (Suites). Baths, Toilets (attached to bedrooms) Corridors Lobbies Conference Rooms (Small) Assembly Rooms (Large) Public Rest Rooms Cottages (treat as single- unit dwellings) (See also Food Services, Industrial, Merc handising, Barber and Beauty Shops, Garages for a ssociated Hotel/Motel Services). •Installed capacity for intermittent use. Dry Cleaners and Laundries Commercial' Storage/Pickup Areas. Coin-operated *ExhausF to outside; source control as required. ••lnstalled equipment must incorporate positive ex haust and control (as required) of undesirable contaminants (t (toxic or otherwise).. Barber, Beauty and Health Services Beauty Shops (Hair dressers) Reducing Salons (Exercise Rooms). Sauna Baths and Steam Rooms Barber Shops Photo Studios Camera Rooms, Stages Darkrooms •Thermal'effects probably determine requirements. Shoe Repair Shops (Combined Workrooms/' Trade Areas) ASHRAE STANDARD 62-73 i Estimated persons/ 1000 sq ft floor, area. Use only when design oc- Required ventilation air, cubic feet per, minute per, human occupant, (whenithe number is bracketed, refer to the notes). Comments cupancy is not known Minimum Recommended - 5 5 70 10 15-20 20 30 35-35 * 100 30 35-35 150 30 40-50 100 30 35-40 5 7 10-15 20 10 15-20 - 20 30-50 * 5 5 7-10 30' 7 10-15. 70 20 25-30 140 15 20-25 100 1s 20-25 10 20 25-30 * * * 30 7 10-15 20 15 15-20 ** 50 25 30-35 20 25 30-35. - 5 5 25 7 10-15 10 5 7-10 * 10 10 15-20 W W 110 10 15-20 7 I

C Estimatedd persons/ 1000' sq ft floor area. Use only when design oc- cupancy is not known Garages, Auto Repair Shops; Service Stations Parking Garages (enclosed) Auto Repair Workrooms (general) Service Station Offices 0 'cfm per sq ft of floor area •'Stands where engines are run must incorporate systems for positive engine exhaust withdrawal Theatres Ticket Booths Lobbies, (Foyers and Lounges ) 150 Auditoriums (in Motion Picture Theatres, Legitimate Theatres, Lecture, Concert and Opera Halls-no smoking) 50 Auditoriums (smoking permitted) 150~ Stages (with proscenium and curtains) 70 Green Rooms an& Workrooms. 20 Public Rest'Rooms 100 •Thermal effects probably determine requirements ''Special ventilation will be needed to eliminate stage effect contaminants Bowling Alleys (Seating Area) Gymnasiums and Arenas' Playing Floors-minimal or no seating Locker Rooms Spectator Areas. Ramps, Foyers, and Lobbies Pool Rooms Amusement Parlors Tennis, Squash, Handball Courts (indoor) Swimming Pools (indoor) 'The same for air.supported structures ice•skating and Curling Rinks •The same for air-supported structures Roller Rinks 100 70 70 20. 1'50 150 25 25: 25 70 70 C Required ventilation air, cubic feet per minute per human occupant„(when the number isbrackete& , refer to the notes). Minimum ~ Recommended (11.5) (2.0}(3.0) (1i.5) (2.0)-(3.0) 7 10-15 5 7-10 20 25-30 5 5-10 10 10-20 10 12-15 10 12-15 15 20-25 15 20-25 15 20-25 20: 25-3 0 (30) (40)-(50) 20 25-30 10 15-20 20 2 5-30 20 25-30 20 25-30 15 20-25 10 15-20 10. 15-20 Comments * © GD 'The same for air-supported structures 8 ASHRAE STANDARD 62-7 3 0 t