Today with increase in standard of modern lifestyle, most houses are integrated with facilities that were incomprehensible years before. A swimming pool is one of them. However, if you have a swimming pool in your premises, you will also need a pool heater to keep the water reasonably warm around the year. This is especially true for people living in colder regions of the world. When it comes to choosing a pool heater for your swimming pool, most people are left with two options gas fired pool heater and electrically run pool heater. Selecting a pool heater will depend on many factors such as size of pool, location/climate, and frequency of use, efficiency, and cost. Both these types of heater have their respective advantages and shortcomings. They will lead to conspicuous expenditure on fuel or power. This is in addition to what you are already paying to run your HVAC and other appliances in the house. Has the idea of heating the pool with the waste heat from the house ever come to your mind? Yes, that is what an Air Conditioner Water Heater, or ACWH does. It doubles up as a cooler cooling the house an also as a heater producing hot water for domestic use.