We have investited on the efficiency of the electric vacuum cleaners for household use. On this experiment, we have used the Expired Gas Analyer IHO6(SAN-EI, K.K) to get energy expenditure of house cleaning. The testing items are, (1) The difference of energy expenditure of cleaning for the each types of the test floors: Which are P-tile, Tatami, and 4 kinds of carpets. (2) The energy expenditure of cleaning for the room with a given quantity of furnitures: The volumes of furnitures are 0, 3, 10, 20% of the room with 2 kinds of chair. The results of the experiments are as follows. 1. The energy expenditure of cleaning for the types of test floors: Setting the energy expenditure on the basis of P-tile, Tatami needs 20~24% energy expenditure than P-tile, and carpet needs 60~64% energy expenditure than P-tile. 2. Cleaning time: The more the room has many furnitures, the more it takes longer. The types of vacuum cleaners, the Shoulder-type cleaner needs 1.19 times of the Upright-type, and the Cylender-type needs 1.08 times of the Upright-type. 3. The energy expenditure of cleaning for a given quantity of furnitures: The more the rooms has many furnitures, the more the energy expenditure increase. A 10% (20%) increases in the volume of the furniture causes a 100% (200%) increases in the energy expenditure of vacuum cleaners.