Introduction
Lennox is a company under the Lennox industry that manufactures air conditioner products. The air conditioners have for a long time experienced the problem of excess noise during use. Noise is the main problem that has made the products of Lennox be rejected by most customers (Afuah & Tucci, 2012). The improvement of the efficiency of the product will increase the value and the competition of the product in the market. Many people have had a negative attitude towards the products because of their noisy nature. Therefore, this report intends to improve and increase the efficiency of the air conditioners ...