The hot water coil in HVAC systems is responsible for delivering warm air to the building’s interior. It works by transferring heat energy from a hot water source, typically a boiler or a direct hot water heater, to the indoor air. As the hot water runs through the coils, the air around them gets heated, allowing cold air to be removed and replaced with warm air. HVAC Hot Water Coils provide an efficient way to maintain comfortable temperatures in any environment.