Detailed evaluation of heating costs 2002-2020 of an Exhaust Air Heat Pump (EAHP)

We built an Icon 4 house in 2002 with the company Dennert from Schlüsselfeld, Germany.

We were the first to get the Fighter 315-P Exhaust Air Heat Pump (EAHP) from Nibe.

Now, 19 years later, I have done the work and created a very detailed evaluation of my heating costs.

The spreadsheet with the complete data is here:

Year/PositionHousehold energy ET kWhHousehold energy ET €/kWh net excl. EEG etc. (Tarif 700)Fees net e. g. EEG etc.Basic price netGross amount ET with 19 % German VAT, EEG etc. and basic priceHousehold energy tariff ET Ct/kWh gross with 19 % German VAT, EEG etc. and basic pricePrice increase to 2003Heating HT kWhHeating tariff HT €/kWh net excl. EEG etc. (Tarif 730)Fees net e. g. EEG etc.Basic price netGross amount ET with 19 % German VAT, EEG etc. and basic priceEnergy price HT Ct/kWh gross with 19 % German VAT, EEG etc. and basic pricePrice increase to 2003Heating NT kWhHeating tariff NT €/kWh net excl. EEG etc. (Tarif 732)Fees net e. g. EEG etc.Basic price netGross amount NT with 19 % German VAT, EEG etc. and basic priceEnergy price NT Ct/kWh gross with 19 % German VAT, EEG etc. and basic pricePrice increase to 2003Heating consumption kWhTotal heating costs gross with 19 % German VAT, EEG etc. and basic priceMedium heating energy tariff from HT and NT Ct/kWh gross with 19 % German VAT, EEG etc. and basic priceTotal energy consumption kWhEnergy payment grossRemarkWater cbmWater costs grossWater price Ct/cbmPrice increase to 2003Garbage grossTotal housing costs grossMonthly housing costs grossPrice increase to 2003
20027030,1190000,00000015,08117,500,1671370,0024630,0866000,00000015,08271,770,1103400,0016500,0626000,00000015,08140,860,0853700,004113412,630,0978548954816503,31No complete year41152,613,720,0029,40685,32228,440,00
200330320,0939500,02790073,2526,750,1737310,0068510,0637000,02790059,04817,040,1192590,0037660,0398000,02790059,04373,660,0992190,00106171190,700,109238924136491590,0916 % VAT197749,753,810,00176,402516,24209,690,00
200428460,0978000,03128073,2524,270,1842126,0349090,0702000,03128021,87618,840,1260635,7030000,0473000,03128021,87306,560,1021852,997909925,400,114124024107551374,1916 % VAT137525,43,840,77176,402075,99173,00-17,50
200532800,0976400,03006073,2585,550,1785202,7645490,0707000,03006021,87571,470,1256265,3434000,0478000,03006021,87341,050,1003081,107949912,520,112966702112291463,5916 % VAT169725,714,2912,83178,202367,5197,29-5,91
200633130,1074900,03081073,2632,350,1908709,8742700,0755500,03081021,87566,470,13266311,2440820,0526500,03081021,87431,440,1056936,538352997,910,119178171116651601,96163700,524,3012,92178,202480,68206,72-1,41
200730900,1074900,03081073,2595,650,19276710,9634290,0782000,03081049,20503,360,14679623,0931030,0553000,03081049,2376,520,12133922,296532879,880,13406767996221475,53148637,534,3113,18178,202291,26190,94-8,94
200834220,1189000,03480073,2713,000,20835819,9343620,0943000,03480049,20728,680,16705140,0740780,0650000,03480049,2542,860,13311934,1784401271,540,150085161118621984,54186797,14,2912,60178,202959,84246,6517,63
200930800,1308000,03903075,6712,420,23130733,1446080,1143000,03903049,20899,340,19516863,6543980,0850000,03903049,2707,670,16090862,1890061607,010,178038272120861674,63Vattenfall 1.5.2009 bis 30.04.2010 gesamt 760,10160710,324,4416,65178,202563,15213,601,86
201030000,1308000,03903075,6696,260,23208633,5949900,1126500,03903027,42933,320,18703856,8347810,0833500,03903027,42728,900,15245753,6697711662,220,169747664127711934,13Vattenfall 1.5.2009 bis 30.04.2010 gesamt 760,10, 3000 für ET geschätzt214944,644,4115,99117,902996,67249,7219,09
201132470,1247000,05610073,2785,710,24197939,2855400,1067000,05610028,501107,190,19985467,5850910,0721000,05610028,5810,590,15922060,47106311917,780,179536799138782696,08199847,614,2611,92126,903670,59305,8845,88
201232340,1271050,05795073,2799,280,24715142,2641590,1056050,05795028,50843,380,20278570,0439100,1420100,05795028,5964,310,246626148,5780691807,690,224705684113032278,28155663,754,2812,52135,653077,68256,4722,31
201340640,1333800,08032073,21120,600,27573758,7155090,0939800,08032028,501176,580,21357379,0850340,0648800,08032028,5903,730,17952580,94105432080,310,196549238146073200,91167713,894,2712,32157,184071,98339,3361,83
201429610,1320100,08819073,2863,000,29145667,7628600,0895100,08819028,50638,700,22332187,2628780,0619100,08819028,5547,980,19040391,9057381186,680,20686230886992049,67137708,855,1735,95146,182904,7242,0615,44
201533720,1294100,08656073,2953,730,28283762,8043450,0869300,08656028,50930,950,21425979,6642710,0592900,08656028,5775,200,18150282,9386161706,150,197880443119882659,88139718,965,1735,91151,683530,52294,2140,31
201637880,1285700,09267073,21084,400,28627164,7834260,0930000,09267028,50790,880,23084793,5729720,0739600,09267028,5623,230,209701111,3563981414,110,220273903101862498,50150857,095,7150,14174,443530,03294,1740,29
201729690,1398000,09734078930,660,31346080,4342990,0994000,09734054,001070,740,249068108,8538580,0826600,09734054890,640,230856132,6781571961,390,23996228111262892,04119683,275,7450,87179,903755,21312,9349,24
201830430,1410000,09605078951,220,31259279,9335960,1006000,09605054,00905,770,251883111,2134110,0839000,09605054794,690,232980134,8170071700,470,242431453100502651,66122700,095,7450,78193,403545,15295,4340,89
201933460,1488000,09461086,41072,010,32038684,4138430,1079000,09461058,20995,370,259009117,1833900,0937000,09461058,2828,920,244519146,4472331824,290,251763873105792896,30132944,867,1688,08174,304015,46334,6259,58
202041070,1530300,09813086,41330,320,32391586,4540140,1188900,09923086,401144,700,285177139,1235270,1025600,09923086,4949,750,269281171,4075412094,460,277229185116483309,806 months with 16 % VAT1801254,676,9783,15221,104785,57398,8090,19
Total59897820227060015262220770340231,78291514036,623051,8357138,223174,35
The complete calculation is based on net prices. German VAT increased from 16 % to 19 % in 2007. Temporary reduction in Q3 and Q4 of 2020.

Since the heat pump could break at any moment, we are currently looking into a successor solution.

Unfortunately, I can’t find a good approach to evaluate the current system, because I can’t interpret the data in the heat demand certificate and the determined data of the electricity consumption.

Could someone possibly help me to come to an assessment?

The following questions would be relevant for me:

Does the electricity consumption determined under real conditions correspond to the calculated energy demand from the heat demand certificate?

Can I use the original certificate after almost 20 years or do I need to have a new heat demand certificate prepared?

Is an exhaust air heat pump still recommended in 2021? We are also open to other, modern solutions.

Published by Schmitt Trading Ltd

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