Exhibit A Ordinance Number ________ CIVANO ENERGY CODE FINAL DRAFT - 10/26/95 (CABO Model Energy Code, 1995 Edition Modified for Civano) Material to be added is shown; material to be deleted is shown as *>strikeout<* . CHAPTER 1 ADMINISTRATION AND ENFORCEMENT Section 101.4 Scope. Add a paragraph to read: The calculated source annual energy consumption at the building site shall be less than the energy required by the present Tucson/Pima County Model Energy Code by the following percentages: Single family/Multifamily dwellings - 60 percent Commercial buildings/Retail Establishments - 50 percent Source energy consumption shall be determined by multiplying the site energy usage in KBtuh per square foot by the following factors: Site Energy Factor Electric 3.10 Gas 1.11 Wood 1.00 Solar (amount of displaced electric or gas) 0.00 Section 102.2 Maintenance Information: Delete the first two sentences. Section 102.3 Change the first sentence to read: Whole-window U-factor, solar heat gain coefficient, visible light transmittance and air leakage values of fenestration products ... Table 102.3a Add the following notes at the end of the table: The minimum design characteristics to qualify as a Thermal Break are: a. The material used as the thermal break must have a thermal conductivity of not more than 3.6 Btu/inch/hr/sq. ft./oF, and; b. The thermal break must produce a gap not less than 0.210 inches, and; c. All metal members of the product exposed to interior and exterior air must incorporate a thermal break meeting the criteria in (a) and (b) above. In addition, the product must be clearly labeled by the manufacturer that it qualifies as a thermally broken product. Non-metal products may include metal fasteners, hardware, and door thresholds. For all dual glazed products, adjust the listed U-values as follows: a. Subtract 0.05 for spacers 7/16" or wider. b. Add 0.05 for products with dividers between panes if the spacer is less than 7/16" wide. c. Add 0.05 to any product with true divided lites (dividers through the panes). Section 102.4 Equipment Add a new subsection to read: 102.4 Equipment. Buildings constructed under the provisions of this code shall be permitted to use refrigerated air conditioning systems only if installed in conjunction with ductwork, electrical service and control wiring and plumbing compatible with an evaporative cooler. Other provisions of this code notwithstanding, air conditioning equipment shall have a minimum SEER of 12 or a minimum EER of 10. Section 104.1 General: Delete parenthesis around last sentence, delete the Footnote. Add a paragraph after the exception to read: Plans and specifications shall show the method of utilizing solar energy. Solar usage shall include, but not be limited to, optimum building orientation, passive solar design for window placement, solar water heating or space heating. CHAPTER 2 DEFINITIONS Section 201 Definitions: Revise as follows: 201.1 Application of Terms. Conditioned Floor Area: Delete the words "The horizontal projection of", and capitalize the new first word "That". 201.1 Application of Terms. Positive Cooling Supply: Insert including evaporative cooling systems, between "cooling" and "deliberately" Add a new subsection: 201.1 Application of Terms. Civano: A Tucson Solar Village, a model sustainable community; a vision of the future where resource consumption is reduced through more efficient technologies, use of solar energy and lifestyles which promote greater harmony and balance with the natural environment; a community in the spirit of the "Civano" period, a golden era of the Hohokam culture which balanced natural resources and human needs; incorporates and demonstrates strategies for achieving more sustainable development. Add a new subsection: 201.1 Application of Terms. Power Density: The total connected power load of all components of a building system, including all auxiliary components and circuitry, without regard to the timing, scheduling, or control of their operation, in w/ft2 or Btuh/ft2. Add a new subsection: 201.1 Application of Terms. Site Energy: Energy, other than recovered energy, utilized for any purpose on the site. 201.1 Application of Terms. SOLAR ENERGY SOURCE. Revise to read: SOLAR ENERGY SOURCE. *>Source of n<* Natural daylighting *>and of<* or thermal, chemical or electrical energy derived directly from conversion of incident solar radiation. 201.1 Application of Terms. Water-chilling Package of Absorption Revise to read: Water-chilling package, absorption. CHAPTER 3 DESIGN CONDITIONS Table 302.1 Exterior design conditions: Revise the table as follows: Table 302.1 Exterior Design Conditions3 WINTER DESIGN DRY BULB TEMP. 30 oF SUMMER DESIGN DRY BULB TEMP. 104 oF DESIGN WET BULB TEMP. 66 oF DEGREE DAYS HEATING 7000 DEGREES NORTH LATITUDE 32o 3 This table is not intended to be used for the purpose of system or equipment sizing. Add a new section to read: SECTION 304 WOOD-BURNING STOVES AND FIREPLACES 304.1 General. A wood-burning stove or fireplace shall be considered as providing the required space heating energy only when installed as backup energy for a solar-thermal collection system. 304.2 Wood-burning stoves. Wood-burning stoves shall be labeled to show compliance with the following U. S. Environmental Protection Agency (EPA) standards for particulate emissions during operation: Stoves with catalytic elements 4.1 grams per hour Stoves without catalytic elements 7.5 grams per hour Catalytic stoves shall have an accessible, modular, replaceable catalyst element. 304.3 Fireplaces. Wood-burning fireplaces shall be provided with a means of supplying 100% of the combustion air for operation from the outside, and shall limit particulate emissions to less than 7.5 grams per hour. All fireplaces shall be provided with a tight fitting glass door and a positive means of circulating the heated air in the occupied space. CHAPTER 4 RESIDENTIAL BUILDING DESIGN BY SYSTEMS ANALYSIS AND DESIGN OF BUILDINGS UTILIZING RENEWABLE ENERGY SOURCES Section 402.1 Energy Analysis. Change the first paragraph to read: 402.1 Energy Analysis. Compliance with this chapter will require an analysis of the annual source energy usage as required in section 101.4, hereinafter called an annual energy analysis. 402.1.1 Input values for Group R buildings. Add a sentence at the end of the first paragraph to read: Domestic hot water energy use must be calculated separately from glazing systems, heat storage, thermal envelope and space conditioning equipment and must meet the energy reduction percentages of section 101.4. Distribution System Loss Factor on page 12; change the Outside factor for Cooling to read *>0.80 <* 0.75. Section 402.4 Calculation Procedure. Operational Characteristics: Add a sentence to read: The occupied mode shall be not less than 10 hours in a 24-hour period. Section 402.5 Documentation. Delete the exception. Section 404.1 Water heaters, storage tanks and boilers. Add a sentence to read: All water heating applications which exceed a 30oF T shall include a solar heating component, heat recovery from a device other than the water heater or an energy-equivalent alternative on a fuel use basis. CHAPTER 5 RESIDENTIAL BUILDING DESIGN BY COMPONENT PERFORMANCE APPROACH Section 502.1 General: Add: Thermal design parameters to be used in this chapter are found in Chapter 3, Section 302.1. Section 502.1.2: Revise the second paragraph by placing a comma after "Masonry", and adding "earthen materials," between "Masonry" and "or". Table No. 502.1.2c Delete the phrase " *>, SUCH AS A LOGWALL<* " in the heading. Section 502.2.1 Walls. Add a subsection to read: 502.2.1.2 Glazing. Whole-unit glazing maximum U-value shall be determined by the following equation: U = 5 (Glazing Percentage) - 5 where Glazing Percentage = 100 x (glazing area / floor area) Table 502.2.1a Revise as follows: Table 502.2.1a ( 1 ) HEATING AND COOLING CRITERIA ELEMENT MODE TYPE A-1 BUILDINGS or TYPE A-2 BUILDINGS UO Walls *>2 <* Heating or cooling 0.110 Roof/Ceiling Heating or cooling 0.026 Floors over unheated spaces Heating or cooling 0.05 Heated slab on grade *>3<* Heating R-Value 5 Unheated slab on grade *> 4<* Heating R-Value 5 Basement wall *>5<* 2 Heating or cooling U-Value 0.095 Crawl space wall *>5,6<* 2,3 Heating or cooling U-Value 0.06 1 Values *>shall be<* are determined by using the graphs (Figure Nos. 1, 2, 3, 4, 5 and 6) contained in Chapter 8 using heating degree days as specified in Section 302. *>2 Walls. The requirements for locations with less than 500 heating degree days shall be: (a) No maximum Uo if building is heated only. (b) If the building is to be mechanically cooled when built or if provision is made for the future addition of mechanical cooling, the maximum Uo for walls in Type A-1 buildings shall be 0.30 Btuh/ft/oF and in type A-2 buildings shall be 0.38 Btuh/ft/oF.<* *>3<* *>There are no insulation requirements for heated slabs in locations having less than 500 Fahrenheit heating degree days. 4 There are no insulation requirements for unheated slabs in locations having less than 2,500 Fahrenheit heating degreedays.<* *>5<* 2 Basement and crawl space wall U values shall be based on the wall components and surface air films. Adjacent soil shall not be considered in the determination of the U value. *>6<* 3 Typical foundation wall insulation techniques can be found in Standard RS-20 listed in Chapter 8. Section 502.2.2 Roof/ceiling. Add the following: Roof/ceiling surfaces shall have a Heat Rejection Index greater than 0.8 over at least 75 percent of the opaque area, as determined by the formula Heat Rejection Index = albedo + (absorptance x emissivity) / 2 where: albedo = the portion of light across visible spectrum reflected, on a 0 to 1 scale absorptance = 1 - reflectance emissivity = portion of absorbed heat radiantly emitted, across the infrared spectrum, on a 0 to 1 scale as determined for varying finishes by Standard RS-56, listed in Chapter 8,or other documentation approved by the building official. Section 502.2.4 Slab-on-grade floors: Revise as follows: 502.2.4 Slab-on-grade floors. For slab-on-grade floors, the thermal resistance of the insulation around the perimeter of the floor shall not be less than the value given in Table 502.2.1a. Insulation shall be placed on the outside of the foundation or on the inside of a foundation wall. *>In climates below 6,000 annual Fahrenheit heating degree days (HDD) (Celsius) or greater,<* The insulation shall extend downward from the top of the slab for *>a minimum of 48 inches (1219 mm)<* a minimum of 12 inches (304 mm) below grade, or to the bottom of the footing, whichever is greater; or downward to at least the bottom of the slab and then horizontally to the interior or exterior for a minimum total distance of *>48 inches (1219 mm) <* 36 inches (914 mm). *>In all climates, t <* The horizontal insulation extending outside of the foundation shall be covered by pavement or by soil a minimum of 10 inches (254 mm) thick. The top edge of the insulation installed between the exterior wall and the edge of the interior slab shall be permitted to be cut at a 45-degree angle away from the exterior wall. Section 502.3.4 Recessed lighting fixtures. Revise the first paragraph to read: 503.2.4 Recessed lighting fixtures. When installed in the building envelope, recessed lighting fixtures shall be constructed so as to accept only lamps with efficacy greater than 40 lumens/watt, and meet one of the following requirements: Section 503.2.1 Calculation procedures. Add a sentence to read: Equipment not covered by the tables in this section shall show the following maximum installed cooling power densities, including all auxiliaries: less than 65,000 BTU/hr: 2.7 kW primary energy per 1000 sf at site 65,000 - 135,000 BTU/hr: 3.6 kW per 1000 sf 135,000 - 250,000 BTU/hr: 3.7 kW per 1000 sf greater than 250,000 BTU/hr: 2.0 kW per 1000 sf with energy intensity of mechanical cooling equipment calculated from EER ratings if entirely electric. Table 503.35a Change the SEER values in the fourth column (Minimum Performance) from 10 and 9.7 to 12.0 and 10, respectively. Section 503.4 Add a new sub-section to read: 503.4.3 Speed Reduction: An automatic method of speed reduction for pump and fan motors, or air or water flow reduction, during less than full system load conditions, which assures energy savings through motor power input reduction, shall be employed for any air system that exceeds a total system static pressure of 2.0 inches water gauge, and any water system that exceeds a total water system pressure equivalent to a 50 foot head of water. Section 503.5 Balancing. Add a new second sentence to read: For structures with a floor area greater than 5000 square feet with forced-air climate control, balancing shall be performed, or included as part of a commissioning process from the design and construction phase. Certification and results of the balancing shall be submitted to the jurisdiction, the owner and the designer of the project. Section 503.9 Piping Insulation. Delete exceptions 2 and 4, and renumber exception 3 to 2. Section 504.2 Water heaters, storage tanks and boilers. Add a sentence to read: All water heating applications which exceed a 30oF T shall include a solar heating component, heat recovery from a device other than the water heater or an energy-equivalent alternative on a fuel use basis. Section 504.2.1.1 Electric Water heaters. Revise as follows: 504.2.1.1 Electric Water heaters. All Automatic electric storage water heaters *>having a storage capacity of 120 gallons (454L) or less and an input rating of 12 kW or less <* shall have a standby loss not exceeding 4.0 watts/ft2 (43W/m2) of tank surface or 43 watts, whichever is greater, when tested in accordance with Standard RS-5 listed in Chapter 8 and calculated at an 80o temperature difference. *> <* Section 504.2.1.2 Gas- and oil-fired water heaters. Change the sixth paragraph to read: Natural gas- *>and oil-<* fired water heaters *>having an input rate of more than 4,000 Btu/h per gallon (1172 W per L) of stored water and having a pilot input rate greater than 0.5 percent of the maximum heater input rate (but not exceeding 750 Btu/h) (220 W)<* shall be equipped with an ignition system which is not a continuously burning pilot light, and shall be accompanied by an automatic flue damper. Section 504.2.3 Combination service water heating/space heating boilers. Delete the exceptions. Section 504.5.1 Add the following at the beginning of the paragraph: All recreational swimming pools shall utilize solar energy as the only water heating source. Medical and rehabilitation pools smaller than 3,000 gallons water capacity shall use solar energy as the primary water heating source, with a new energy source permitted as backup. Add a new Section 504.2.4: Section 504.5.4 Recirculating Systems. Recirculating systems shall be provided with time clocks as required in Sec. 504.5.3, switches as required in Sec. 504.6, and pipe insulation as required in Sec. 504.7. Section 504.8 Conservation of Hot Water. Delete in its entirety and add "Plumbing fixtures supplied with hot water shall comply with Chapter 15 of the Tucson/Pima County Plumbing Code" Add a new section 506 to read: 506. Energy Consumption - Other Than Electrical. In multifamily dwellings , provisions shall be made to determine the energy consumed by each tenant by separately metering individual dwelling units or tenant spaces. CHAPTER 6 RESIDENTIAL BUILDING DESIGN BY ACCEPTABLE PRACTICE Section 602.2.1 Walls. Add the following paragraph to read: 602.2.1.1 Wall assemblies. Exterior walls shall be constructed to meet a minimum composite R-Value of 14 including air films. The following assemblies are deemed to meet this requirement: 1. Nominal 2 x 6 wood-frame construction insulated with R-19 batts or loose-fill insulation. 2. Nominal 2 x 4 wood-frame construction insulated with R-11 batts or loose-fill insulation and rigid insulation board on the exterior with an R-Value of not less than 3.2, with a nominal 4 inch brick veneer. 3. Nominal 2 x 4 wood-frame construction insulated with R-11 batts or loose-fill insulation and rigid insulation board on the exterior with an R-Value of not less than 5.0. 4. Earthen material or solid masonry, with a total heat capacity of 22 Btuh/ft/oF, at least 12 inches in thickness with rigid insulation board with an R-Value of not less than 5.0 applied to the exterior. 5. Earthen material or solid masonry, with a total heat capacity of 44 Btuh/ft/oF, at least 24 inches in thickness. 6. Straw bales at least 14 inches in thickness. 7. Log construction with an average thickness of 12 inches. 8. Log construction with an average thickness of 6 inches and nominal 2 x 4 frame construction insulated with R-11 batts or loose-fill insulation. Add the following exceptions after the last paragraph: Exceptions: 1. Doors whose area and U-value are considered as glazing in section 602.2.1 shall be exempt. 2. One exterior swinging door with a maximum area of 32 square feet may be installed for ornamental, security or architectural purposes and be exempt from these requirements. Add new subsections to read: 602.2.1.1 Exterior door area. For doors containing at least 20 percent of the door area in glazing, the glazing area shall be subtracted from the door area for the purpose of determining the U-value of the door. 602.2.1.2 Exterior door U-value. All exterior doors shall have a maximum area weighted U-value not exceeding that prescribed in Table 102.3b. 602.2.1.3 Glazing. Whole-unit glazing maximum U-value shall be determined by the following equation: U = 5 / ((Glazing Percentage) - 5) where Glazing Percentage = 100 x (glazing area / floor area) Section 602.2.2 Roof/ceiling. Add a new subsection to read: 602.2.2.1 Roof/ceiling assemblies. Ceilings below ventilated attic spaces and single rafter vaulted ceilings shall be constructed to meet a minimum composite R-value of 38 including air films. The following assemblies are deemed to meet this requirement: 1. Wood-frame assembly insulated with R-36 batts or loose-fill insulation. 2. Earthen material or solid masonry, with a total heat capacity of 22 Btuh/ft/oF, at least 12 inches in thickness with glass fiber or foam insulation with an R-Value of not less than 22 applied to the interior. 3. Earthen material or solid masonry, with a total heat capacity of 44 Btuh/ft/oF, at least 24 inches in thickness with glass fiber or foam insulation with an R-Value of not less than 11 applied to the interior. 4. Earthen material or solid masonry, with a total heat capacity of 66 Btuh/ft/oF, at least 36 inches in thickness 5. Straw bales at least 14 inches in thickness. Section 602.2.4 Slab-on-grade floors. Change the second paragraph as follows: Insulation shall be placed on the outside of the foundation or on the inside of a foundation wall. *>In climates below 6,000 annual Fahrenheit heating degree days (HDD) (Celsius) or greater,<* The insulation shall extend downward from the top of the slab for *>a minimum of 48 inches (1219 mm)<* a minimum of 12 inches (304 mm) below grade to, or the bottom of the footing which ever is greater; or downward to at least the bottom of the slab and then horizontally to the interior or exterior for a minimum total distance of *>48 inches (1219 mm) <* 36 inches (914 mm). *>In all climates, t <* The horizontal insulation extending outside of the foundation shall be covered by pavement or by soil a minimum of 10 inches (254 mm) thick. The top edge of the insulation installed between the exterior wall and the edge of the interior slab shall be permitted to be cut at a 45-degree angle away from the exterior wall. At least 25 percent of the floor area in the living space shall be without carpet. Section 603.2 HVAC equipment requirements, change to read: ... efficiency and power density requirements of section 503.2 and 503.3. Table No. 603.5 Minimum Pipe Insulation; Revise by changing the numbers 1 1/2 to 1/2 in the third and fourth columns on the line "CHILLED WATER". Section 603.6 Add a new section to read: 603.6 Space Cooling. Buildings that are cooled using air conditioners or air-to-air, ground-to-air or water-to-air heat pumps shall be sized to provide a ratio of one ton of cooling per 600 square feet or more of floor space. System sizing shall be determined by an analysis consistent with industry standards. Section 603.7 Add a new subsection to read: 603.7 Mechanical Equipment and Water Heater Efficiency. The efficiency of water heating and mechanical equipment shall be in accordance with sections 503 and 504 of this code. SECTION 604 SERVICE WATER HEATING Section 604.1.2.3 Swimming Pools. Add the following at the beginning of the first paragraph: All recreational swimming pools shall utilize solar energy as the only water heating source. Medical and rehabilitation pools smaller than 3,000 gallons water capacity shall use solar energy as the primary water heating source, with a new energy source permitted as backup. When permitted, *>P<* pool . . . . . remainder unchanged. Section 604.4 Conservation of hot water. Delete in its entirety and add "Plumbing fixtures supplied with hot water shall comply with Chapter 15 of the Tucson/Pima County Plumbing Code" CHAPTER 7 BUILDING DESIGN FOR ALL BUILDINGS OTHER THAN RESIDENTIAL BUILDINGS Section 702.1 Basic Requirements. Revise to read as follows: 702.1 Basic Requirements. Building designs shall meet the requirements of Chapter 4, 5 or 6 of this code as well as the requirements of Sections 5.4, 6.4, 7.4, 8.4, 9.4, 10.4, 11.4 and 12.4 in Standard RS-22 listed in Chapter 8. Section 702.2 Additional requirements. Add the following before the first exception: Buildings otherwise meeting the requirements of Chapter 4, 5 or 6 of this code may employ the following performance requirement substitutions of Standard RS-22, listed in Chapter 8: Remainder unchanged. Add a new section to read: SECTION 703 ELECTRICAL REQUIREMENTS 703.1 Lighting Power Budget. The maximum lighting power density (LPD) for any building may be calculated by either the Complete Building Method or the Area Category Method, according to the following table: TABLE 703.1 Complete Building Method Building Type Max.Lighting Power Density (W/sf) General commercial or industrial work buildings 0.8 Grocery stores 1.2 Industrial or commercial storage buildings 0.5 Medical buildings and clinics 1.0 Office buildings 1.0 Religious worship, auditorium/convention centers 1.3 Restaurants 1.0 Retail and wholesale stores 1.3 Schools 1.2 Theaters 1.0 All others 0.5 Area Category Method Area Type Max.Lighting Power Density (W/sf) Auditorium 1.3 Bank/financial institutions 1.2 Classrooms 1.3 Convention/conference/meeting centers 1.0 Corridors, restrooms, support areas 0.5 Dining 0.8 Exhibit 1.5 General commercial and industrial work 0.8 Grocery 1.3 Hotel function 1.5 Industrial and commercial storage 0.4 Kitchen 1.5 Lobbies: Hotel lobby 1.5 Main entry lobby 1.0 Malls, arcades, and atria 0.8 Medical and clinical care 1.2 Office 1.0 Precision commercial and/or industrial work 1.3 Religious worship 1.4 Retail sales, wholesale showrooms 1.4 Theaters: Motion picture 0.7 Performance 1.0 For any building greater than 5,000 square feet in area, and for all non-residential buildings, the following shall apply: Lighting design shall comply with current IESNA guidelines and application notes, with selection of the median illuminance as the target optimum, not the minimum. In all areas designated higher than IESNA category C, specified illuminance shall be on task, with ambient illuminance generally task/3. LPD shall in no case exceed the values in Table 703.1. In all areas, lighting targets shall be achieved by the most energy efficient technology which meets the following requirements: À"ÀCRI greater than 80 for work areas, greater than 75 for all areas. À"ÀColor Temperature less than 3600oK, except in retail display, excluding tasklights Technologies include but are not limited to: À"ÀIncorporation of natural daylight, and daylight-supplementing artificial light À"ÀArea lighting by high-CRI straight tube fluorescent with specular reflectorized interior luminaire. Fully electronic instant start 4-lamp parallel-circuit ballasts, wired in tandem to multiple luminaries. Daylight-dimming via photocell sensor/controller. À"ÀTask lighting by 13 watt lamps (or smaller), with laterally offset placement so as not to cause direct or veiling glare À"ÀConference rooms to have continuous architectural-dimming (to 10%) fluorescent luminaries in place of can downlights, or else can lights controlled by center-off double throw switch which prevents simultaneous operation of area lights and downlights. Prohibited technologies include: À"ÀTungsten filament incandescent except quartz-halogen À"ÀT12 fluorescent À"ÀVHO and SHO lamps À"ÀMercury vapor lamps À"ÀU-shaped lamps (except CFLs <20W) À"ÀSmall-cell paracube grates À"ÀMagnetic fluorescent ballasts À"ÀSeries-circuit ballasts À"ÀUnreflectorized interior luminaries Occupancy Sensors shall be specified and installed in accordance with EPA Green Lights guidelines, with control technology appropriate to the application. Areas with video display terminals shall be primarily illuminated by task lighting, with overhead luminaries using high-VCP transparent lenses. Visual acuity factors are to be treated as minus weighting factors. Areas with visible daylight shall use continuous-dimming photocell-controlled variable light output devices except those controlled by non-defeatable occupancy sensors. Daylighting contribution to be considered in calculation of IESNA target illuminance.