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HomeMy WebLinkAboutTHERMEAU HEAT PUMPS101024774 RESIDENTIAL ENERGY EFFICIENCY FLORIDA BUILDING CODE — ENERGY CONSERVATION, 7th EDITION (2020) R-25 R403.5.4 Drain water heat recovery units. Drain water heat recovery units shall comply with CSA B55.2. Drain water heat recovery units shall be tested in accordance with CSA B55.1. Potable water-side pressure loss of drain water heat recovery units shall be less than 3 psi (20.7 kPa) for individual units connected to one or two showers. Potable water-side pressure loss of drain water heat recov- ery units shall be less than 2 psi (13.8 kPa) for individual units connected to three or more showers. R403.5.5 Heat traps (Mandatory). Storage water heaters not equipped with integral heat traps and having vertical pipe risers shall have heat traps installed on both the inlets and outlets. External heat traps shall consist of either a commercially available heat trap or a downward and upward bend of at least 31/2 inches (89 mm) in the hot water distribution line and cold water line located as close as possible to the storage tank. R403.5.6 Water heater efficiencies (Mandatory). R403.5.6.1 Storage water heater temperature con- trols. 403.5.6.1.1 Automatic controls. Service water-heat- ing systems shall be equipped with automatic tem- perature controls capable of adjustment from the lowest to the highest acceptable temperature settings for the intended use. The minimum temperature set- ting range shall be from 100°F to 140°F (38°C to 60°C). R403.5.6.1.2 Shut down. A separate switch or a clearly marked circuit breaker shall be provided to permit the power supplied to electric service sys- tems to be turned off. A separate valve shall be pro- vided to permit the energy supplied to the main burner(s) of combustion types of service water-heat- ing systems to be turned off. R403.5.6.2 Water-heating equipment. Water-heating equipment installed in residential units shall meet the minimum efficiencies of Table C404.2 in Chapter 4 of the Florida Building Code, Energy Conservation, Com- mercial Provisions, for the type of equipment installed. Equipment used to provide heating functions as part of a combination system shall satisfy all stated requirements for the appropriate water-heating category. Solar water heaters shall meet the criteria of Section R403.5.6.2.1. R403.5.6.2.1 Solar water-heating systems. Solar systems for domestic hot water production are rated by the annual solar energy factor of the system. The solar energy factor of a system shall be determined from the Florida Solar Energy Center Directory of Certified Solar Systems. Solar collectors shall be tested in accordance with ISO Standard 9806, Test Methods for Solar Collectors, and SRCC Standard TM-1, Solar Domestic Hot Water System and Com- ponent Test Protocol. Collectors in installed solar water-heating systems should meet the following criteria: 1. Be installed with a tilt angle between 10 degrees and 40 degrees of the horizontal; and 2. Be installed at an orientation within 45 degrees of true south. R403.6 Mechanical ventilation (Mandatory). The building shall be provided with ventilation that meets the requirements of the Florida Building Code, Residential, or Florida Building Code, Mechanical, as applicable, or with other approved means of ventilation including: Natural, Infiltration or Mechanical means. Outdoor air intakes and exhausts shall have automatic or gravity dampers that close when the venti- lation system is not operating. R403.6.1 Whole-house mechanical ventilation system fan efficacy. When installed to function as a whole-house mechanical ventilation system, fans shall meet the efficacy requirements of Table R403.6.1. Exception: Where an air handler that is integral to tested and listed HVAC equipment is used to provide whole-house mechanical ventilation, the air handler shall be powered by an electronically commutated motor. TABLE R403.6.1 WHOLE-HOUSE MECHANICAL VENTILATION SYSTEM FAN EFFICACY For SI: 1 cfm = 28.3 L/min. a. When tested in accordance with HVI Standard 916. FAN LOCATION AIRFLOW RATE MINIMUM (CFM) MINIMUM EFFICACYa (CFM/WATT) AIRFLOW RATE MAXIMUM (CFM) HRV or ERV Any 1.2 cfm/watt Any Range hoods Any 2.8 cfm/watt Any In-line fan Any 2.8 cfm/watt Any Bathroom, utility room 10 1.4 cfm/watt < 90 Bathroom, utility room 90 2.8 cfm/watt Any Copyright © 2020 ICC. ALL RIGHTS RESERVED. Accessed by Terry Wix (OFFICE@POOLSBYGREGINC.COM), (-) Order Number #101024774 on Feb 05, 2021 05:51 AM (PST) pursuant to License Agreement with ICC. No further reproduction, no further reproductions by any third party, or distribution authorized. Single user only, copying and networking prohibited. ANY UNAUTHORIZED REPRODUCTION OR DISTRIBUTION IS A VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER. 101024774 RESIDENTIAL ENERGY EFFICIENCY R-26 FLORIDA BUILDING CODE — ENERGY CONSERVATION, 7th EDITION (2020) R403.6.2 Ventilation air. Residential buildings designed to be operated at a positive indoor pressure or for mechan- ical ventilation shall meet the following criteria: 1. The design air change per hour minimums for resi- dential buildings in ASHRAE 62.2, Ventilation for Acceptable Indoor Air Quality, shall be the maxi- mum rates allowed for residential applications. 2. No ventilation or air-conditioning system make-up air shall be provided to conditioned space from attics, crawlspaces, attached enclosed garages or outdoor spaces adjacent to swimming pools or spas. 3. If ventilation air is drawn from enclosed space(s), then the walls of the space(s) from which air is drawn shall be insulated to a minimum of R-11 and the ceiling shall be insulated to a minimum of R-19, space permitting, or R-10 otherwise. R403.7 Heating and cooling equipment. R403.7.1 Equipment sizing (Mandatory). Heating and cooling equipment shall be sized in accordance with ACCA Manual S based on the equipment loads calculated in accordance with ACCA Manual J or other approved heating and cooling calculation methodologies, based on building loads for the directional orientation of the build- ing. The manufacturer and model number of the outdoor and indoor units (if split system) shall be submitted along with the sensible and total cooling capacities at the design conditions described in Section R302.1. This Code does not allow designer safety factors, provisions for future expansion or other factors that affect equipment sizing. System sizing calculations shall not include loads created by local intermittent mechanical ventilation such as stan- dard kitchen and bathroom exhaust systems. New or replacement heating and cooling equipment shall have an efficiency rating equal to or greater than the minimum required by federal law for the geographic location where the equipment is installed. R403.7.1.1 Cooling equipment capacity. Cooling only equipment shall be selected so that its total capac- ity is not less than the calculated total load but not more than 1.15 times greater than the total load calculated according to the procedure selected in Section R403.7, or the closest available size provided by the manufac- turer’s product lines. The corresponding latent capacity of the equipment shall not be less than the calculated latent load. The published value for AHRI total capacity is a nominal, rating-test value and shall not be used for equipment sizing. Manufacturer’s expanded perfor- mance data shall be used to select cooling-only equip- ment. This selection shall be based on the outdoor design dry-bulb temperature for the load calculation (or entering water temperature for water-source equip- ment), the blower CFM provided by the expanded per- formance data, the design value for entering wet-bulb temperature and the design value for entering dry-bulb temperature. Design values for entering wet-bulb and dry-bulb temperatures shall be for the indoor dry bulb and rela- tive humidity used for the load calculation and shall be adjusted for return side gains if the return duct(s) is installed in an unconditioned space. Exceptions: 1. Attached single- and multiple-family residen- tial equipment sizing may be selected so that its cooling capacity is less than the calculated total sensible load but not less than 80 percent of that load. 2. When signed and sealed by a Florida-regis- tered engineer, in attached single- and multi- ple-family units, the capacity of equipment may be sized in accordance with good design practice. R403.7.1.2 Heating equipment capacity. R403.7.1.2.1 Heat pumps. Heat pump sizing shall be based on the cooling requirements as calculated according to Section R403.7.1.1, and the heat pump total cooling capacity shall not be more than 1.15 times greater than the design cooling load even if the design heating load is 1.15 times greater than the design cooling load. R403.7.1.2.2 Electric resistance furnaces. Electric resistance furnaces shall be sized within 4 kW of the design requirements calculated according to the pro- cedure selected in Section R403.7.1. R403.7.1.2.3 Fossil fuel heating equipment. The capacity of fossil fuel heating equipment with natu- ral draft atmospheric burners shall not be less than the design load calculated in accordance with Sec- tion R403.7.1. R403.7.1.3 Extra capacity required for special occasions. Residences requiring excess cooling or heating equipment capacity on an intermittent basis, such as anticipated additional loads caused by major entertainment events, shall have equipment sized or controlled to prevent continuous space cooling or heating within that space by one or more of the fol- lowing options: 1. A separate cooling or heating system is utilized to provide cooling or heating to the major entertain- ment areas. 2. A variable capacity system sized for optimum performance during base load periods is utilized. R403.7.2. Electric space heating (Prescriptive). Electric resistance space heating shall not be the primary heating system used in Climate Zone 2. R403.8 Systems serving multiple dwelling units (Manda- tory). Systems serving multiple dwelling units shall comply with Sections C403 and C404 of the Florida Building Code, Energy Conservation—Commercial Provisions in lieu of Section R403. R403.9 Snow melt and ice system controls (Mandatory). Snow- and ice-melting systems, supplied through energy ser- Copyright © 2020 ICC. ALL RIGHTS RESERVED. Accessed by Terry Wix (OFFICE@POOLSBYGREGINC.COM), (-) Order Number #101024774 on Feb 05, 2021 05:51 AM (PST) pursuant to License Agreement with ICC. No further reproduction, no further reproductions by any third party, or distribution authorized. Single user only, copying and networking prohibited. ANY UNAUTHORIZED REPRODUCTION OR DISTRIBUTION IS A VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER. 101024774 RESIDENTIAL ENERGY EFFICIENCY FLORIDA BUILDING CODE — ENERGY CONSERVATION, 7th EDITION (2020) R-27 vice to the building, shall include automatic controls capable of shutting off the system when the pavement temperature is above 50°F (10°C), and no precipitation is falling and an automatic or manual control that will allow shutoff when the outdoor temperature is above 40°F (4.8°C). R403.10 Pools and permanent spa energy consumption (Mandatory). The energy consumption of pools and perma- nent spas shall be in accordance with Sections R403.10.1 through R403.10.5. R403.10.1 Heaters. The electric power to heaters shall be controlled by a readily accessible on-off switch that is an integral part of the heater mounted on the exterior of the heater, or external to and within 3 feet (914 mm) of the heater. Operation of such switch shall not change the set- ting of the heater thermostat. Such switches shall be in addition to a circuit breaker for the power to the heater. Gas-fired heaters shall not be equipped with continuously burning ignition pilots. R403.10.2 Time switches. Time switches or other control methods that can automatically turn off and on according to a preset schedule shall be installed for heaters and pump motors. Heaters and pump motors that have built-in time switches shall be in compliance with this section. Exceptions: 1. Where public health standards require 24-hour pump operation. 2. Pumps that operate solar- and waste-heat-recov- ery pool heating systems. 3. Where pumps are powered exclusively from on- site renewable generation. R403.10.3 Covers. Outdoor heated swimming pools and outdoor permanent spas shall be equipped with a vapor- retardant cover on or at the water surface or a liquid cover or other means proven to reduce heat loss. Exception: Where more than 70 percent of the energy for heating, computed over an operation season, is from site-recovered energy, such as from a heat pump or solar energy source, covers or other vapor-retardant means shall not be required. R403.10.4 Gas- and oil-fired pool and spa heaters. All gas- and oil-fired pool and spa heaters shall have a mini- mum thermal efficiency of 82 percent for heaters manu- factured on or after April 16, 2013, when tested in accordance with ANSI Z 21.56. Pool heaters fired by natu- ral or LP gas shall not have continuously burning pilot lights. R403.10.5 Heat pump pool heaters. Heat pump pool heaters shall have a minimum COP of 4.0 when tested in accordance with AHRI 1160, Table 2, Standard Rating Conditions-Low Air Temperature. A test report from an independent laboratory is required to verify procedure compliance. Geothermal swimming pool heat pumps are not required to meet this standard. R403.11 Portable spas (Mandatory). The energy consump- tion of electric-powered portable spas shall be controlled by the requirements of APSP-14. R403.12 Residential pools and permanent residential spas. Residential swimming pools and permanent residen- tial spas that are accessory to detached one- and two-family dwellings and townhouses three stories or less in height above grade plane and that are available only to the house- hold and its guests shall be in accordance with APSP-15. R403.13 Dehumidifiers (Mandatory). If installed, a dehu- midifier shall conform to the following requirements: 1. The minimum rated efficiency of the dehumidifier shall be greater than 1.7 liters/ kWh if the total dehumidifier capacity for the house is less than 75 pints/day and greater than 2.38 liters/kWh if the total dehumidifier capacity for the house is greater than or equal to 75 pints/day. 2. The dehumidifier shall be controlled by a sensor that is installed in a location where it is exposed to mixed house air. 3. Any dehumidifier unit located in unconditioned space that treats air from conditioned space shall be insulated to a minimum of R-2. 4. Condensate disposal shall be in accordance with Sec- tion M1411.3.1 of the Florida Building Code, Residen- tial. R403.13.1 Ducted dehumidifiers. Ducted dehumidifiers shall, in addition to conforming to the requirements of Section R403.13, conform to the following requirements: 1. If a ducted dehumidifier is configured with return and supply ducts both connected into the supply side of the cooling system, a backdraft damper shall be installed in the supply air duct between the dehu- midifier inlet and outlet duct. 2. If a ducted dehumidifier is configured with only its supply duct connected into the supply side of the central heating and cooling system, a backdraft damper shall be installed in the dehumidifier supply duct between the dehumidifier and central supply duct. 3. A ducted dehumidifier shall not be ducted to or from a central ducted cooling system on the return duct side upstream from the central cooling evaporator coil. 4. Ductwork associated with a dehumidifier located in unconditioned space shall be insulated to a mini- mum of R-6. SECTION R404 ELECTRICAL POWER AND LIGHTING SYSTEMS R404.1 Lighting equipment (Mandatory). Not less than 90 percent of the lamps in permanently installed luminaires shall have an efficacy of at least 45 lumens-per-watt or shall utilize lamps with an efficacy of not less than 65 lumens-per-watt. R404.1.1 Lighting equipment (Mandatory). Fuel gas lighting systems shall not have continuously burning pilot lights. Copyright © 2020 ICC. ALL RIGHTS RESERVED. Accessed by Terry Wix (OFFICE@POOLSBYGREGINC.COM), (-) Order Number #101024774 on Feb 05, 2021 05:51 AM (PST) pursuant to License Agreement with ICC. No further reproduction, no further reproductions by any third party, or distribution authorized. Single user only, copying and networking prohibited. ANY UNAUTHORIZED REPRODUCTION OR DISTRIBUTION IS A VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER. 101024774 RESIDENTIAL ENERGY EFFICIENCY R-28 FLORIDA BUILDING CODE — ENERGY CONSERVATION, 7th EDITION (2020) SECTION R405 SIMULATED PERFORMANCE ALTERNATIVE (PERFORMANCE) R405.1 Scope. This section establishes criteria for compli- ance using simulated energy performance analysis. Such analysis shall include heating, cooling and service water heat- ing energy only. R405.2 Mandatory requirements. Compliance with this section requires that the mandatory provisions identified in Section R401.2 be met. All supply and return ducts not com- pletely inside the building thermal envelope shall be insulated to a minimum of R-6. R405.2.1 Ceiling insulation. Ceilings shall have an insu- lation level of at least R-19, space permitting. For the pur- poses of this code, types of ceiling construction that are considered to have inadequate space to install R-19 include single assembly ceilings of the exposed deck and beam type and concrete deck roofs. Such ceiling assem- blies shall be insulated to at least a level of R-10. R405.2.2 Building air leakage testing. Building or dwell- ing air leakage testing shall be in accordance with Sections R402.4 through R402.4.1.2. If an air leakage rate below seven air changes per hour at a pressure of 0.2 inch w.g. (50 pascals) is specified for the proposed design, testing shall verify the air leakage rate does not exceed the air leakage rate of the proposed design instead of seven air changes per hour. R405.2.3 Duct air leakage testing. In cases where duct air leakage lower than the default Qn to outside of 0.080 (where Qn = duct leakage to the outside in cfm per 100 square feet of conditioned floor area tested at 25 Pascals) is specified for the proposed design, testing in accordance with Section R403.3.2 shall verify a duct air leakage rate not exceeding the leakage rate of the proposed design. Otherwise, in accordance with Section R403.3.3, duct test- ing is not mandatory for buildings complying by Section R405. R405.3 Performance-based compliance. Compliance based on simulated energy performance requires that a proposed residence (proposed design) be shown to have annual total normalized Modified Loads that are less than or equal to the annual total loads of the standard reference design as calcu- lated in accordance with Appendix RC of this standard. R405.4 Documentation. Documentation of the software used for the performance design and the parameters for the building shall be in accordance with Sections R405.4.1 through R405.4.3. R405.4.1 Compliance software tools. Computer software utilized for demonstration of code compliance shall have been approved by the Florida Building Commission in accordance with requirements of this code. R405.4.2 Compliance report. Compliance software tools shall generate a report that documents that the pro- posed design complies with Section R405.3. A compli- ance report on the proposed design shall be submitted with the application for the building permit. Upon com- pletion of the building, a compliance report based on the as-built condition of the building shall be submitted to the code official before a certificate of occupancy is issued. Batch sampling of buildings to determine energy code compliance for all buildings in the batch shall be prohibited. Compliance reports shall include information in accordance with Sections R405.4.2.1 and R405.4.2.2. Where the proposed design of a building could be built on different sites where the cardinal orientation of the building on each site is different, compliance of the proposed design for the purposes of the application for the building permit shall be based on the worst-case orientation, worst-case configuration, worst-case building air leakage and worst-case duct leakage. Such worst-case parameters shall be used as inputs to the compliance software for energy analysis. R405.4.2.1 Compliance report for permit applica- tion. A compliance report submitted with the applica- tion for building permit shall include the following: 1. Building street address, or other building site identification. 2. A statement indicating that the proposed design complies with Section R405.3. 3. An inspection checklist documenting the building component characteristics of the proposed design as indicated in Table R405.5.2(1). The inspection checklist shall show results for the proposed design with user inputs to the compliance soft- ware to generate the results. 4. A site-specific energy analysis report that is in compliance with Section R405.3. 5. The name of the individual performing the analy- sis and generating the report. 6. The name and version of the compliance software tool. Exception: Multiple orientations. When an other- wise identical building model is offered in multiple orientations, compliance for any orientation shall be permitted by documenting that the building meets the performance requirements in each of the four cardinal (north, east, south and west) orientations, or the “Worst” orientation. Compliance software tools may calculate the “Worst Case” orientation by rotat- ing the building through the 4 or 8 cardinal orienta- tions. Copyright © 2020 ICC. ALL RIGHTS RESERVED. Accessed by Terry Wix (OFFICE@POOLSBYGREGINC.COM), (-) Order Number #101024774 on Feb 05, 2021 05:51 AM (PST) pursuant to License Agreement with ICC. No further reproduction, no further reproductions by any third party, or distribution authorized. Single user only, copying and networking prohibited. ANY UNAUTHORIZED REPRODUCTION OR DISTRIBUTION IS A VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER. 101024774 RESIDENTIAL ENERGY EFFICIENCY FLORIDA BUILDING CODE — ENERGY CONSERVATION, 7th EDITION (2020) R-29 R405.4.2.2 Compliance report for certificate of occupancy. A compliance report submitted for obtain- ing the certificate of occupancy shall include the fol- lowing: 1. Building street address, or other building site identification. 2. A statement indicating that the as-built building complies with Section R405.3. 3. A certificate indicating that the building passes the performance matrix for code compliance and listing the energy saving features of the build- ings. 4. A site-specific energy analysis report that is in compliance with Section R405.3. 5. The name of the individual performing the analy- sis and generating the report. 6. The name and version of the compliance software tool. Exception: If there is no change to the proposed design during the course of construction and all required inspections to verify compliance have been performed a compliance report for certificate of occupancy is not required. R405.4.3 Additional documentation. The code official shall be permitted to require the following documents: 1. Verification that an EPL display card signed by the builder providing the building component character- istics of the proposed design will be provided to the purchaser of the home at time of title transfer. 2. Documentation of the component efficiencies used in the software calculations for the proposed design. R405.5 Calculation procedure. Calculations of the perfor- mance design shall be in accordance with Sections R405.5.1 through R405.5.3. R405.5.1 General. Except as specified by this section, the standard reference design and proposed design shall be configured and analyzed using identical methods and tech- niques. R405.5.2 Residence specifications. The standard refer- ence design and proposed design shall be configured and analyzed as specified by Table R405.5.2(1). Table R405.5.2(1) shall include, by reference, all notes con- tained in Table R402.1.2. R405.5.3 Calculation requirements for glazing. R405.5.3.1 Glass areas. All glazing areas of a resi- dence, including windows, sliding glass doors, glass in doors, skylights, etc., shall include the manufacturer’s frame area in the total window area. Window measure- ments shall be as specified on the plans and specifica- tions for the residence. Exception: When a window in existing exterior walls is enclosed by an addition, an amount equal to the area of this window may be subtracted from the glazing area for the addition for that overhang and orientation. R405.5.3.2 Overhangs. Overhang effect is measured by Overhang Separation, which is the vertical measure of the distance from the top of a window to the bottom of the overhang. The overhang for adjustable exterior shading devices shall be determined at its most extended position. Nonpermanent shading devices such as canvas awnings shall not be considered overhangs. Permanently attached wood and metal awnings may be considered overhangs. R405.5.3.3 Doors with glazing. For doors that are opaque or where the glass is less than one-third of the area of the door, the total door area shall be included in the door calculation. For unlabeled sliding glass doors or when glass areas in doors are greater than or equal to one-third of the area of the door, the glazing portion shall be included in the glazing calculation and the opaque portion of the door shall be included in the door calculation. When glass areas in doors are greater than or equal to one-third of the area of the door, the door shall be included in the glazing calculation as a total fenestration using the tested U-factor and solar heat gain coefficient. R405.5.3.4 Maximum fenestration SHGC. The Pro- posed Design must have either an area-weighted aver- age maximum fenestration SHGC of 0.50 or a window area-weighted average overhang depth of 4.0 feet or greater (all conditioned space windows must be included in the calculation). The area-weighted average maximum fenestration U-factor permitted using tradeoffs from Section R402.1.5 or R405 shall be 0.48 in Climate Zones 4 and 5 and 0.40 in Climate Zones 6 through 8 for vertical fenestration, and 0.75 in Climate Zones 4 through 8 for skylights. The area-weighted average maximum fenestration SHGC permitted using tradeoffs from Section R405 in Climate Zones 1 through 3 shall be 0.50. Copyright © 2020 ICC. ALL RIGHTS RESERVED. Accessed by Terry Wix (OFFICE@POOLSBYGREGINC.COM), (-) Order Number #101024774 on Feb 05, 2021 05:51 AM (PST) pursuant to License Agreement with ICC. No further reproduction, no further reproductions by any third party, or distribution authorized. Single user only, copying and networking prohibited. ANY UNAUTHORIZED REPRODUCTION OR DISTRIBUTION IS A VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER. 101024774