I Sverige finns det cirka 4,5 miljoner bostäder och den siffran stiger i lika snabb takt med den ökande befolkningen. Riksdagen har beslutat att energianvändningen ska minska i två etapper utifrån EU:s direktiv att uppnå så kallade näranollenergibyggnader.Här beskrivs vilka parametrar som utgör en byggnads energiprestanda och hur man sänker energianvändningen i bostäder genom VVS-projektering. Framförallt hur man kan nå detta utifrån den ekonomiska aspekten. Vilka regler och krav måste följas för att inte påverka människans hälsa.Projektet innefattar teoretiska sammanställningar av VVS komponenter som är grunden till genomförandet. Den tänkta bostaden byggdes upp och simulerades i simuleringsprogrammet IDA ICE för att plocka fram viktig information till VVS-projekteringen.Resultatet visar att en bergvärmepump är en fördelaktig värmekälla ekonomiskt men framförallt energimässigt. Ventilationssystemet klarade att upprätthålla ett gott inomhusklimat utan att bryta mot några föreskrifter.

The first of July 2017, Boverket implemented new rules on how to calculate a buildings energy use. This was the first of two steps where Boverket implemented use with a factor depending on the type of energy used in the building and also a factor depending on the location of the building in Sweden. This removed the four zones that were previously used and gave all of Sweden the same energy requirement of 85 kWh/m2 Atemp, year. In the second step, a referral was sent with suggestions of the new stricter requirement to 2020. In the second change, the factors for energy use with electricity and district heating changed from 1,6 to 1,85 for electricity and respectively 1,0 to 0,95 for district heating. In the thesis, an apartment building in Västerås has been investigated. The primary energy has been evaluated in three different cases with different heating. District heating and geothermal heat pump has been calculated separately but also in combination with each other and with solutions as, from supply air ventilation with heat recovery (FTX) and solar panels. The purpose of the thesis is to see how future energy solutions are affected by the changes in Boverket and how to achieve the upcoming energy use regulations that are put on an apartment block. With calculations of the numbers that were implemented in 2017, the primary energy was calculated to 89,3 kWh/m2 Atemp, year for heat pump with district heating, 95,5 kWh/m2 Atemp, year for district heating and 119,4 kWh/ m2Atemp, year for the geothermal heat pump. When the primary energy was calculated with the suggested changes from the referral the value with geothermal heat pump with district heating changed to 92,9 kWh/m2 Atemp, year, with only district heating this changed to 93,6 kWh/m2 Atemp, year and with only a geothermal heat pump it changed to 138 kWh/m2 Atemp, year. This meant that none of the cases met the current 2017 requirement of 85 kWh/m2 Atemp, year and none met the requirement of the 2020 referrals of 78 kWh/m2 Atemp, year. The change that gave the most significant change in primary energy was to install FTX in the building. Results with FTX presents the primary energy for heat pump with district heating decreased from 92,9 kWh/m2 Atemp, year to 75,8 kWh/m2 Atemp, year, and in combination with district heating from 93,6 kWh/m2 Atemp, year to 76,3 kWh/m2 Atemp, year and heat pump decreased from 138 kWh/m2 Atemp, year to 106,5 kWh/m2 Atemp, year. This change made all the cases except the geothermal heat pump reach the 2020 requirement of 78 kWh/m2 Atemp, year. The conclusion of this work is that the possibilities to achieve the requirements are good and that the most challenging case to reach them is with the geothermal heat pump. But it comes with a higher price where investments are getting bigger and higher demands will be made on distributors and the execution. Therefore, it is crucial to find the best solution from both an energy perspective but also an economic perspective.