ASTM_F_2644_-_07_2013.pdf

Designation:F264407(Reapproved 2013)An American National StandardStandard Test Method forPerformance of Commercial Patio Heaters1This standard is issued under the fixed designation F2644;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This test method covers the heating performance andenergy consumption of commercial radiant patio heaters.Thefood service operator can use this evaluation to select acommercial patio heater and understand its energy perfor-mance and effective heated area.1.2 This test method is applicable to commercial gas andelectric radiant patio heaters.1.3 The patio heater can be evaluated with respect to thefollowing:1.3.1 Energy input rate(10.2),1.3.2Preheat energy consumption and time(10.3),1.3.3 Temperature distribution(10.4),and1.3.4 Effective heated area(10.4).1.4 The values stated in inch-pound units are to be regardedas the standard.The values given in parentheses are forinformation only.1.5 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D3588 Practice for Calculating Heat Value,CompressibilityFactor,and Relative Density of Gaseous Fuels2.2 ANSI Documents:3ANSI Z83.19 Gas-Fired High-Intensity Infrared HeatersANSI Z83.20 Gas-Fired Low-Intensity Infrared Heaters2.3 ASHRAE Documents:4ASHRAE 551992 Thermal Environmental Conditions forHuman Occupancy3.Terminology3.1 Definitions:3.1.1 boundary,nthe edge of the area being warmed undera patio heater that corresponds to 3F above the designenvironment mean radiant temperature.3.1.2 design environment,nunheated environment forwhich test units performance is to be evaluated.Designenvironment is specified as having a mean radiant temperatureof 60F.3.1.3 effective heated area,nthe amount of square footagethat can be warmed to a specified temperature(3F above thedesign environment mean radiant temperature)under a patioheater.3.1.4 energy input rate,npeak rate at which a patio heaterconsumes energy(kW or Btu/h),typically reflected duringpreheat.3.1.5 heating index,nthe quotient of the effective heatedarea and the measured energy input rate.3.1.6 mean radiant temperature,nthe uniform surfacetemperature of an imaginary black enclosure in which anoccupant would exchange the same amount of radiant heat asin the actual non-uniform space.NOTE1Since all environments radiate thermal energy,the meanradiant temperature can be determined for an unheated as well as a heatedenvironment.3.1.7 operative temperature,nthe uniform temperature ofan imaginary black enclosure in which an occupant wouldexchange the same amount of heat by radiation plus convectionas in the actual non-uniform environment.Operative tempera-ture is numerically the average of the air temperature(Ta)andthe mean radiant temperature(Tr),weighted by their respectiveheat transfer coefficients(hcand hr)(see ASHRAE 551992):To5hc3Ta1hr3Tr!hc1hr!1This test method is under the jurisdiction of ASTM Committee F26 on FoodService Equipment and is the direct responsibility of Subcommittee F26.06 onProductivity and Energy Protocol.Current edition approved June 1,2013.Published August 2013.Originallyapproved in 2007.Last previous edition approved in 2007 as F2644 07.DOI:10.1520/F2644-07R13.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3Available from American National Standards Institute(ANSI),25 W.43rd St.,4th Floor,New York,NY 10036,http:/www.ansi.org.4Available from American Society of Heating,Refrigerating,and Air-Conditioning Engineers,Inc.(ASHRAE),1791 Tullie Circle,NE,Atlanta,GA30329,http:/www.ashrae.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 NOTE2In the absence of air movement,the operative temperature isequal to the mean radiant temperature.3.1.8patio heater,nan appliance that is designed forwarming outdoor areas using radiant heat.3.1.9preheat energy,namount of energy consumed bythe patio heater while preheating the patio heater from ambientroom temperature(75 6 10F)to its operating temperature.3.1.10preheat rate,naverage rate(F/min)at which thepatio heater comes up to its operating temperature from a 75 610F ambient temperature.3.1.11 preheat time,ntime required for the patio heater topreheat from ambient room temperature(75 6 10F)to itsoperating temperature.3.1.12 uncertainty,nmeasure of systematic and precisionerrors in s