The Lindell family reduced their CO2 level at best to 1.5 tonnes!
All the small and simple things of everyday life helped reduce the family's CO2 footprint. The budget was tight. To achieve the goal of one tonne per person per year, the family had to cope with a low 80 kg of CO2 per week. The lowest result was measured during week 20, when the family came down to the equivalent of 1.5 tonnes.
A reduced CO2 footprint by 79 %
Emissions from transports accounted for the largest reduction – by up to 95 %. Closely followed by food, 84 %, housing, 58 %, and the rest reduced by 51 %. Overall, this meant a 79 % reduction in CO2 emissions.
Positive excess of energy from week 15
The One Tonne Life House is an exceptionally energy-efficient house. Thanks to solar panels on the garage and solar cells on the house, it also produces heat and electricity. From the time the family moved in through week 13, the weather was cold with very little sunshine. As early as February the solar cells, for short periods, began to deliver more electricity than the house consumed. From mid-April the house began to be a net supplier, calculated over full 24-hour periods of day and night. The house´s electricity surplus during the day was greater than the need at night. The solar cells produced about 5,000 kWh per year, of which about 1,500 could be sold or used to recharge the electric car. From April the family began buying electricity from hydropower, which reduced emissions significantly.
Energy Watch showed where the electricity vampires were
The Lindell´s have had a lot of help from Energy Watch, that among other things, shows the consumption of electricity in real time, and also locates what consumes the most electricity. That all appliances and white goods are of the highest standard has helped out. But even little things like spending less time in the shower, washing everything in the dishwasher instead of under running water, and doing the laundry with a full machine has contributed to the result.
The Lindell´s average consumption before they moved into the house was about 29,000 kWh per year. In The One Tonne Life House the purchase of electricity will be reduced by 80 %, down to 6,000 kWh.
The One Tonne Life House is brand new. During the first few weeks energy consumption was higher than normal due to three factors. The house had to be heated. The family chose an indoor temperature of 23°C, and it was a cold winter. The indoor temperature was lowered gradually to 20°C.
From mid-April the sun, via solar panels on the carport, contributed more and more to the house’s heating and hot water needs. The solar panels will cover a large part of the house’s heating and hot water needs through October.
The use of electricity has been reduced as the Lindell´s have changed their habits, such as always washing with a full machine, and turning off the TV and computers when they are not in use.
The need for electricity amounted to 300-400 watts when the family was not at home. Ventilation and pumps account for a large portion of energy consumption. It is therefore essential that the house is equipped with pumps and ventilation fans with high efficiency, since they are operating 24/7.