log house has great ability on heat preservation energy and economize on energy.Under the same thickness condition,log made house's heat insulationg value is 16 times than air brick made house.In summer,the temperature in log house is 2.4 degree lower than brick house;in winter is 4 degree higher.Log house is coller in summer and warmer in winter.
Chinese unification forestry teaching material "Lumber Protection Study" explicitly indicate that, the life-span of people who live in log made houses is 9 to 11 years longer than people who live in ferroconcrete made houses.It is obvious that log living environment has supernatural effect to human being's health.
