Update: Well combining word in my book says its the root word plus the combining vowel. So in cardiology, the word cardi is the root word meaning heart and the O (combining vowel) connects it to LOGY which means the study of. So the combining word would be cardi/o (cardio) But I cant seem to figure out these bigger... show more Well combining word in my book says its the root word plus the combining vowel. So in cardiology, the word cardi is the root word meaning heart and the O (combining vowel) connects it to LOGY which means the study of. So the combining word would be cardi/o (cardio) But I cant seem to figure out these bigger words. 1 following.
heat exchanger - device that transfers heat from one liquid to another without allowing them to mix. device - an instrumentality invented for a particular purpose; the device is small enough to wear on your wrist; a device intended to conserve water.
In order to get you that piping-hot shower when you want it, a tankless water heater uses a powerful heat exchanger to raise the temperature. A heat exchanger is a device that transfers heat from one source to another. There are heat exchangers in your air conditioner, refrigerator and car radiator.ith tankless water heaters, you can choose from electric, propane or natural gas models. Point-of-use models are generally electric, while whole-house systems are usually powered by either natural gas or propane.