Blog From cozy woodstove to sustainable and healthy woodstove technology Hopefully my PhD project will contribute to a sustainable woodstove future, where the impact on climate is mitigated and the air quality will be improved, which will improve people’s health and quality of life. Blog Hot hotels in cold climates: reducing energy consumption with CO2 heat pumps We’ve studied 140 hotels in Norway and Sweden, and found that CO2 heat pumps in hotels can reduce thermal energy consumption by about 60%.