ASE Heating and Air Conditioning (A7) Practice Test 2025 - Free ASE A7 Practice Questions and Study Guide

A hydronic heating system is designed specifically to use hot water as a medium for heating spaces. In this system, water is heated in a boiler and then circulated through pipes that run to radiators, baseboards, or underfloor heating systems in various rooms. The heat from the water is released into the spaces, effectively heating them.

The efficiency of hydronic systems often allows for better heat distribution and more comfortable heating on a room-by-room basis. Unlike forced air heating systems that blow hot air into the rooms, or electric systems that rely on electrical resistance and do not use water, hydronic systems take advantage of water’s high heat capacity, making it an efficient choice for heating applications. Additionally, geothermal systems utilize heat from the ground, not hot water generated by a boiler. Therefore, the focus of this question clearly identifies hydronic heating systems as the proper choice, as they are exclusively associated with the use of hot water for heating.