{
  "url": "https://openlegislation.uk/eu-regulation-2016-2281/annex-III",
  "json_url": "https://openlegislation.uk/eu-regulation-2016-2281/annex-III.json",
  "legislation": "eur/2016/2281",
  "legislation_title": "Commission Regulation (EU) 2016/2281 of 30 November 2016 implementing Directive 2009/125/EC of the European Parliament and of the Council establishing a framework for the setting of ecodesign requirements for energy-related products, with regard to ecodesign requirements for air heating products, cooling products, high temperature process chillers and fan coil units (Text with EEA relevance)",
  "legislation_url": "https://openlegislation.uk/eu-regulation-2016-2281",
  "path": "annex/III",
  "kind": "annex",
  "number": "III",
  "heading": "Measurement and calculation",
  "text": "For establishing the values of rated and declared cooling capacity, power input, energy efficiency ratio and the seasonal energy performance ratio, measurements shall be done using the following conditions:\n(a)the reference ambient temperature at the outdoor side heat exchanger shall be 35 °C for air-cooled high temperature process chillers and 30 °C water inlet temperature to the condenser (rating point with 35 °C outdoor air temperature) for water-cooled high temperature process chillers\n(b)the outlet temperature of the liquid at the indoor side heat exchanger shall be 7 °C dry bulb temperature;\n(c)the variations of the ambient temperature throughout the year, representative of average climate conditions in the European Union, and the corresponding number of hours when these temperatures occur, shall be as set out in Table 28;\n(d)the effect of the degradation of energy efficiency caused by cycling depending on the type of capacity control of the high temperature process chiller shall be measured or a default value shall be used.\nTable 16\nStandard rating conditions for air-to-air heat pumps and air conditioners\nThe wet bulb temperature condition is not required when testing units which do not evaporate condensate.\nOutdoor side heat exchanger\nIndoor side heat exchanger\ninlet dry bulb temperature °C\ninlet wet bulb temperature °C\ninlet dry bulb temperature °C\ninlet wet bulb temperature °C\nHeating mode (for heat pumps)\nOutside air/recycled air\n7\n6\n20\n15 max\nExhaust air/outdoor air\n20\n12\n7\n6\nCooling mode (for air conditioners)\nOutside air/recycled air\n35\n24\n27\n19\nExhaust air/recycled air\n27\n19\n27\n19\nExhaust air/outdoor air\n27\n19\n35\n24\nTable 17\nStandard rating conditions for water/brine-to-water comfort chillers\nOutdoor side heat exchanger\nIndoor side heat exchanger\ninlet temperature °C\noutlet temperature °C\ninlet temperature °C\noutlet temperature °C\nCooling mode\nwater-to-water (for low temperature heating applications) from cooling tower\n30\n35\n12\n7\nwater-to-water (for medium temperature heating applications) from cooling tower\n30\n35\n23\n18\nTable 18\nStandard rating conditions air-to-water comfort chillers\nOutdoor side heat exchanger\nIndoor side heat exchanger\ninlet temperature °C\noutlet temperature °C\ninlet temperature °C\noutlet temperature °C\nCooling mode\nair-to-water (for low temperature applications)\n35\n—\n12\n7\nair-to-water (for medium temperature applications)\n35\n—\n23\n18\nTable 19\nStandard rating conditions for water/brine-to-air heat pumps and air conditioners\nFor units designed for heating and cooling mode, the flow rate obtained during the test at standard rating conditions in cooling mode is used.\nOutdoor side heat exchanger\nIndoor side heat exchanger\ninlet temperature °C\noutlet temperature °C\ninlet dry bulb temperature °C\ninlet wet bulb temperature °C\nHeating mode (for heat pumps)\nwater\n10\n7\n20\n15 max\nbrine\n0\n– 3\n20\n15 max\nwater loop\n20\n17\n20\n15 max\nCooling mode (for air conditioners)\ncooling tower\n30\n35\n27\n19\nground coupled (water or brine)\n10\n15\n27\n19\nTable 20\nReference ambient temperatures for high temperature process chillers\nTest point\nPart load ratio of high temperature process chillers\nPart load ratio (%)\nOutdoor side heat exchanger (°C)\nIndoor side heat exchanger\nEvaporator inlet/outlet water temperatures (°C)\nFixed outlet\nA\n80 % + 20 % × (TA -TD )/(TA -TD )\n100\nInlet air temperature\n35\n12/7\nInlet/outlet water temperatures\n30/35\nTable 21\nPart load conditions for air conditioners, comfort chillers and heat pumps\nOutlet temperatures dependent on water flow rate as determined at standard rating conditions (100 % part load ratio when cooling, 88 % when heating)\nRating point\nOutdoor temperature\nPart load ratio\nOutdoor side heat exchanger\nIndoor side heat exchanger\nAir-to-air air conditioners\nTj (°C)\nOutdoor air dry bulb temperatures (°C)\nIndoor air dry bulb (wet bulb) temperatures (°C)\nA\n35\n100 %\n35\n27 (19)\nB\n30\n74 %\n30\n27 (19)\nC\n25\n47 %\n25\n27 (19)\nD\n20\n21 %\n20\n27 (19)\nWater-to-air air conditioners\nRating point\nTj (°C)\nPart load ratio\nCooling tower or water loop application inlet/outlet temperatures (°C)\nGround coupled application (water or brine) inlet/outlet temperatures (°C)\nIndoor air dry bulb (wet bulb) temperatures (°C)\nA\n35\n100 %\n30/35\n10/15\n27 (19)\nB\n30\n74 %\n26/\n10/\n27 (19)\nC\n25\n47 %\n22/\n10/\n27 (19)\nD\n20\n21 %\n18/\n10/\n27 (19)\nAir-to-water comfort chillers\nRating point\nTj (°C)\nPart load ratio\nOutdoor air dry bulb temperatures (°C)\nFan coil application inlet/outlet water temperatures (°C)\nCooling floor application inlet/outlet water temperatures (°C)\nFixed outlet\nVariable outlet\nA\n35\n100 %\n35\n12/7\n12/7\n23/18\nB\n30\n74 %\n30\n/7\n/8,5\n/18\nC\n25\n47 %\n25\n/7\n/10\n/18\nD\n20\n21 %\n20\n/7\n/11,5\n/18\nWater-to-water comfort chillers\nRating point\nTj (°C)\nPart load ratio\nCooling tower or water loop application inlet/outlet temperatures (°C)\nGround coupled application (water or brine) inlet/outlet temperatures (°C)\nFan coil application inlet/outlet water temperatures (°C)\nCooling floor application inlet/outlet water temperatures (°C)\nFixed outlet\nVariable outlet\nA\n35\n100 %\n30/35\n10/15\n12/7\n12/7\n23/18\nB\n30\n74 %\n26/\n10/\n/7\n/8,5\n/18\nC\n25\n47 %\n22/\n10/\n/7\n/10\n/18\nD\n20\n21 %\n18/\n10/\n/7\n/11,5\n/18\nAir-to-air heat pumps\nRating point\nTj (°C)\nPart load ratio\nOutdoor air dry bulb (wet bulb) temperatures (°C)\nIndoor air dry bulb temperature (°C)\nA\n– 7\n88 %\n– 7(– 8)\n20\nB\n+ 2\n54 %\n+ 2(+ 1)\n20\nC\n+ 7\n35 %\n+ 7(+ 6)\n20\nD\n+ 12\n15 %\n+ 12(+ 11)\n20\nE\nTol\ndepends on Tol\nTj = Tol\n20\nF\nTbiv\ndepends on Tbiv\nTj = Tbiv\n20\nWater/brine-to-air heat pumps\nRating point\nTj (°C)\nPart load ratio\nGround Water\nBrine\nIndoor air dry bulb temperature (°C)\nInlet/outlet temperatures (°C)\nInlet/outlet temperatures (°C)\nA\n– 7\n88 %\n10/\n0/\n20\nB\n+ 2\n54 %\n10/\n0/\n20\nC\n+ 7\n35 %\n10/\n0/\n20\nD\n+ 12\n15 %\n10/\n0/\n20\nE\nTol\ndepends on Tol\n10/\n0/\n20\nF\nTbiv\ndepends on Tbiv\n10/\n0/\n20\nTable 22\nPart load conditions for SEPR calculation for air-cooled high temperature process chillers\nWith the water flow rate determined during ‘A’ test for units with a fixed water flow rate or with a variable flow rate.\nRating point\nPart load ratio of high temperature process chillers\nPart load ratio (%)\nOutdoor side heat exchanger\nIndoor side heat exchanger\nInlet air temperature (°C)\nEvaporator inlet/outlet water temperatures (°C)\nFixed outlet\nA\n80 % + 20 % × (TA -TD )/(TA -TD )\n100\n35\n12/7\nB\n80 % + 20 % × (TB -TD )/(TA -TD )\n93\n25\n/7\nC\n80 % + 20 % × (TC -TD )/(TA -TD )\n87\n15\n/7\nD\n80 % + 20 % × (TD -TD )/(TA -TD )\n80\n5\n/7\nTable 23\nPart load conditions for SEPR calculation for water-cooled high temperature process chillers\nWith the water flow rate determined during ‘A’ test for units with a fixed water flow rate or with a variable flow rate.\nRating point\nPart load ratio of high temperature process chillers\nPart load ratio (%)\nWater-cooled condenser\nIndoor side heat exchanger\nInlet/outlet water temperatures (°C)\nOutdoor air temperature (°C)\nEvaporator Inlet/outlet water temperatures (°C)\nFixed outlet\nA\n80 % + 20 % × (TA -TD )/(TA -TD )\n100\n30/35\n35\n12/7\nB\n80 % + 20 % × (T B-T D)/(T A-T D)\n93\n23/\n25\n/7\nC\n80 % + 20 % × (T C-T D)/(T A-T D)\n87\n16/\n15\n/7\nD\n80 % + 20 % × (TD-TD)/(TA-TD)\n80\n9/\n5\n/7\nTable 24\nReference design conditions for comfort chillers, air conditioners and heat pumps\nFunction\nSeason\nReference design temperature dry bulb (wet bulb)\nTdesign,c\nCooling\nAverage\n35 (24) °C\nReference design temperature\nBivalent temperature maximum\nOperation limit temperature maximum\nTdesign,h\nTbiv\nTol\nHeating\nAverage\n– 10 (– 11) °C\n+ 2 °C\n– 7 °C\nWarmer\n2 (– 1) °C\n7 °C\n2 °C\nColder\n– 22 (– 23) °C\n– 7 °C\n– 15 °C\nTable 25\nStandard rating conditions for fan coil units\nCooling test\nHeating test\nSound power test\nAir temperature\n27 °C (dry bulb)\n19 °C (wet bulb)\nAir temperature\n20 °C (dry bulb)\nAt ambient conditions without water flow\nInlet water temperature\n7 °C\nInlet water temperature\n45 °C for 2-pipe units\n65 °C for 4-pipe units\nWater temperature rise\n5 °C\nWater temperature decrease\n5 °C for 2-pipe units\n10 °C for 4-pipe units\nTable 26\nEuropean heating seasons for heat pumps\nbinj\nTj (°C)\nHj (h/annum)\nWarmer\nAverage\nColder\n1 to 8\n– 30 to – 23\n0\n0\n0\n9\n– 22\n0\n0\n1\n10\n– 21\n0\n0\n6\n11\n– 20\n0\n0\n13\n12\n– 19\n0\n0\n17\n13\n– 18\n0\n0\n19\n14\n– 17\n0\n0\n26\n15\n– 16\n0\n0\n39\n16\n– 15\n0\n0\n41\n17\n– 14\n0\n0\n35\n18\n– 13\n0\n0\n52\n19\n– 12\n0\n0\n37\n20\n– 11\n0\n0\n41\n21\n– 10\n0\n1\n43\n22\n– 9\n0\n25\n54\n23\n– 8\n0\n23\n90\n24\n– 7\n0\n24\n125\n25\n– 6\n0\n27\n169\n26\n– 5\n0\n68\n195\n27\n– 4\n0\n91\n278\n28\n– 3\n0\n89\n306\n29\n– 2\n0\n165\n454\n30\n– 1\n0\n173\n385\n31\n0\n0\n240\n490\n32\n1\n0\n280\n533\n33\n2\n3\n320\n380\n34\n3\n22\n357\n228\n35\n4\n63\n356\n261\n36\n5\n63\n303\n279\n37\n6\n175\n330\n229\n38\n7\n162\n326\n269\n39\n8\n259\n348\n233\n40\n9\n360\n335\n230\n41\n10\n428\n315\n243\n42\n11\n430\n215\n191\n43\n12\n503\n169\n146\n44\n13\n444\n151\n150\n45\n14\n384\n105\n97\n46\n15\n294\n74\n61\nTotal hours:\n3 590\n4 910\n6 446\nTable 27\nEuropean cooling season for comfort chillers and air conditioners\nBins\nOutdoor temperature (dry bulb)\n‘Average cooling season’\nEER calculation\nbin hours\nj\nTj\nhj\n#\n°C\nh/annum\n1\n17\n205\nEER(D)\n2\n18\n227\nEER(D)\n3\n19\n225\nEER(D)\n4\n20\n225\nD — Measured value\n5\n21\n216\nLinear interpolation\n6\n22\n215\nLinear interpolation\n7\n23\n218\nLinear interpolation\n8\n24\n197\nLinear interpolation\n9\n25\n178\nC — Measured value\n10\n26\n158\nLinear interpolation\n11\n27\n137\nLinear interpolation\n12\n28\n109\nLinear interpolation\n13\n29\n88\nLinear interpolation\n14\n30\n63\nB — Measured value\n15\n31\n39\nLinear interpolation\n16\n32\n31\nLinear interpolation\n17\n33\n24\nLinear interpolation\n18\n34\n17\nLinear interpolation\n19\n35\n13\nA — Measured value\n20\n36\n9\nEER(A)\n21\n37\n4\nEER(A)\n22\n38\n3\nEER(A)\n23\n39\n1\nEER(A)\n24\n40\n0\nEER(A)\nTable 28\nEuropean reference refrigeration season for high temperature process chillers\nbinj\nTj (°C)\nHj (h/annum)\n1\n– 19\n0,08\n2\n– 18\n0,41\n3\n– 17\n0,65\n4\n– 16\n1,05\n5\n– 15\n1,74\n6\n– 14\n2,98\n7\n– 13\n3,79\n8\n– 12\n5,69\n9\n– 11\n8,94\n10\n– 10\n11,81\n11\n– 9\n17,29\n12\n– 8\n20,02\n13\n– 7\n28,73\n14\n– 6\n39,71\n15\n– 5\n56,61\n16\n– 4\n76,36\n17\n– 3\n106,07\n18\n– 2\n153,22\n19\n– 1\n203,41\n20\n0\n247,98\n21\n1\n282,01\n22\n2\n275,91\n23\n3\n300,61\n24\n4\n310,77\n25\n5\n336,48\n26\n6\n350,48\n27\n7\n363,49\n28\n8\n368,91\n29\n9\n371,63\n30\n10\n377,32\n31\n11\n376,53\n32\n12\n386,42\n33\n13\n389,84\n34\n14\n384,45\n35\n15\n370,45\n36\n16\n344,96\n37\n17\n328,02\n38\n18\n305,36\n39\n19\n261,87\n40\n20\n223,90\n41\n21\n196,31\n42\n22\n163,04\n43\n23\n141,78\n44\n24\n121,93\n45\n25\n104,46\n46\n26\n85,77\n47\n27\n71,54\n48\n28\n56,57\n49\n29\n43,35\n50\n30\n31,02\n51\n31\n20,21\n52\n32\n11,85\n53\n33\n8,17\n54\n34\n3,83\n55\n35\n2,09\n56\n36\n1,21\n57\n37\n0,52\n58\n38\n0,40\nTable 29\nOperational hours per functional mode for comfort chillers, air conditioners and heat pumps\nSeason\nOperational hours\nOn-mode\nThermostat Off mode\nStandby mode\nOff mode\nCrankcase heater mode\nHCE (cooling); HHE (heating)\nHTO\nHSB\nHOFF\nHCK\nCooling (to calculate SEER)\nAverage\n600\n659\n1 377\n0\n2 036\nColder\n300\n436\n828\n0\n1 264\nWarmer\n900\n767\n1 647\n0\n2 414\nHeating only (to calculate SCOP)\nAverage\n1 400\n179\n0\n3 672\n3 851\nColder\n2 100\n131\n0\n2 189\n2 320\nWarmer\n1 400\n755\n0\n4 345\n5 100\nHeating, if reversible (to calculate SCOP)\nAverage\n1 400\n179\n0\n0\n179\nColder\n2 100\n131\n0\n0\n131\nWarmer\n1 400\n755\n0\n0\n755",
  "extent": "E+W+S+N.I.",
  "status": null,
  "version": "current",
  "annotations": [
    {
      "type": "footnote",
      "label": "f1",
      "text": "The wet bulb temperature condition is not required when testing units which do not evaporate condensate."
    },
    {
      "type": "footnote",
      "label": "f2",
      "text": "For units designed for heating and cooling mode, the flow rate obtained during the test at standard rating conditions in cooling mode is used."
    },
    {
      "type": "footnote",
      "label": "f3",
      "text": "Outlet temperatures dependent on water flow rate as determined at standard rating conditions (100 % part load ratio when cooling, 88 % when heating)"
    },
    {
      "type": "footnote",
      "label": "f4",
      "text": "With the water flow rate determined during ‘A’ test for units with a fixed water flow rate or with a variable flow rate."
    },
    {
      "type": "footnote",
      "label": "f5",
      "text": "With the water flow rate determined during ‘A’ test for units with a fixed water flow rate or with a variable flow rate."
    }
  ],
  "outstanding_effects": [],
  "provenance": {
    "source": "legislation.gov.uk",
    "source_url": "https://www.legislation.gov.uk/eur/2016/2281/annex/III",
    "retrieved_at": "2026-11-01T14:45:17.759928+00:00"
  },
  "licence": "Open Government Licence v3.0",
  "licence_url": "https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/",
  "attribution": "Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives."
}