Many of todays studies show that district heating is one of the betteralternatives as heating source because of its low environmental load.

The energy source is often leftovers from other processes producing energy or waste, like garbage or chips.

Electricity in combination with geothermal heating is another heating system that has increased sharply during the last years, and also this system decreases the discharges that have negative affects

on the environment compared to several other heating methods.

This report aims to, concentrated towards these two different heating systems, estimate the amounts of discharges they indirect cause and how the environment is affected.

We have calculated the mean value for discharges of carbon dioxide, nitrogen oxide, sulphur oxide and dust generated from electrical power used in Sweden.

Through interviews and research we have gained data for the same substances that district heating based on combustion of garbage and biofuel generates.

We have also in cooperation with a housing company chosen a building we see representative for many of the new single-family houses built in Sweden today.

Based on its shape and appearance we theoretically created three alternatives of the same house, each of them with climate screens different from each other.

Together with the amounts of discharged environmental affecting substances, these houses were the base for our calculations and studies when investigating the different heating sources environmental effect.

The results have thereafter been analyzed and discussed from different angles.