Combination furnace/water heater system

Plumbing · Combination Systems · printed page 282 (PDF page 283)

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Book index entries

Water Heater – Combination Furnace/Water Heater System Plumbing

Text in the illustration

evaporator coil
thermostat
supply plenum
air flow
furnace coil
water flow
air return
blower
filter
fan coil unit
check valve
pump
hot
cold
gas water heater (high efficiency) (large capacity)

Generated explanation

The illustration shows a high-efficiency, large-capacity gas water heater connected to a fan coil unit for combined domestic water heating and space heating. A pump circulates hot water from the heater through the furnace coil, with arrows indicating supply and return water flow and a check valve identified in the piping. Return air travels down the return duct and then upward through a filter, past an evaporator coil and blower, and through the furnace coil into the supply plenum. A thermostat is shown with control wiring to the equipment. The water heater also has separate hot and cold domestic water connections and a vent pipe extending above it.

Components

gas water heater fan coil unit furnace coil evaporator coil blower air filter return air duct supply plenum circulating pump check valve thermostat control wiring water circulation piping domestic hot water outlet cold water inlet vent pipe

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