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AIR HANDLER / BLOWER UNITS
AIRBOUND HEAT SYSTEM REPAIR by WATER FEED VALVE
BACKDRAFTING HEATING EQUIPMENT
BACKUP HEAT for HEAT PUMPS
BLOWER FAN OPERATION & TESTING
BOOKSTORE - InspectAPedia
CIRCULATOR PUMPS & RELAYS
CONVECTOR HEATERS - HYDRONIC COILS
COOL OFF HEAT, Thermostat Switch
DEFINITION of HEATING & COOLING TERMS
DIAGNOSTIC GUIDES A/C / HEAT PUMP
DIAGNOSE & FIX HEATING PROBLEMS-BOILER
DIAGNOSE & FIX HEATING PROBLEMS-FURNACE
DUCT SYSTEM & DUCT DEFECTS
ELECTRIC MOTOR OVERLOAD RESET SWITCH
ELECTRICAL POWER SWITCH FOR HEAT
FAN, AIR HANDLER BLOWER UNIT
FAN AUTO ON Thermostat Switch
FAN, COMPRESSOR/CONDENSER UNIT
FAN CONVECTOR HEATERS - HYDRONIC COILS
FAN LIMIT SWITCH
FLOODED HEATING EQUIPMENT REPAIR
HEATING LOSS DIAGNOSIS-BOILERS
HEATING LOSS DIAGNOSIS-FURNACES
HEATING SYSTEM INSPECT DIAGNOSE REPAIR
LOW VOLTAGE BUILDING WIRING
LOW VOLTAGE TRANSFORMER TEST
MANUALS & PARTS GUIDES - HVAC
NO HEAT - BOILER
NO HEAT - FURNACE
ODORS FROM HEATING SYSTEMS
OIL FILTERS on HEATING EQUIPMENT
PULSE COMBUSTION HEATERS
Reset Switch - Heater Primary Control
Reset Switch Broken - Quick Repair
RESET SWITCH - ELECTRIC MOTOR
Reset Switch - Stack Relays
STEAM HEATING SYSTEMS
THERMOSTATS, HEATING / COOLING
THERMOSTATS, WATER HEATER
THERMOSTATIC EXPANSION VALVES
ZONE VALVES, HEATING
Here we explain the identification, selection, diagnosis and repair of hydronic or steam heated convector fan heaters and similar water-to-air or steam-to-air heating devices such as ceiling, wall or floor mounted heating convectors and heating coils in heat pump air handlers and ductwork. This article focuses on heating convectors heated by hot water from a heating boiler or heat pump. Hydronic heating convectors use hot water or steam from a separate boiler to heat a water-to-air heat exchanger coil mounted in the heating convector unit. A thermostat or manual switch operates a fan to blow room air across the heat exchanger coil to deliver heat where it is wanted.
Our photo above (at page top) shows a hydronic (hot water) heated wall-mounted fan convector heater in a New York City apartment. You can see dual blower fans at the bottom of the unit (the air intake port); Hot water piping from the building boiler is visible at the left edge of this convector heater. Also see ELECTRIC HEAT where we show a wide variety of electrically heated wall, floor, and kick space fan convector heating units.
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How Ceiling, Wall, or Floor Fan Convector Units or Hydronic Heating Coils Convert Hot Water Heat to Warm Air Heat
Fan convector heaters combine a heat source such as hot water piped through a heat exchanger coil and a fan to blow warm air into HVAC ductwork of a warm air heating system or to push warm air into a chilly spot such as a basement, crawl space or into a bathroom or kitchen where there may not be wall space for a conventional heating register radiator.
Fan Convector Heaters as Backup Heat for Heat Pumps
As our photo of a hydronic heating coil (photo at left) shows, hot water heated by a hydronic heating boiler is used to warm air via a heat exchanger that is mounted in an air handler.
Pipes conduct hot water from the boiler to the heat exchanger and back to the boiler. The air handler blows building air from return registers and ducts into the air handler, across the heating coil, and on to supply ducts and registers.
We illustrate and discuss conventional heating convectors (units that work by "gravity" or warm air convection without the added output of an internal fan) at RADIATORS.
Fan Convector Heaters as Add-On Heat for Crawl Spaces, Basements, Garages
Used in crawl spaces, garages, basements, or other locations where additional heat is required or where we want to add heat to a previously un-heated area, ceiling, wall, or floor mounted fan convector heating units are a convenient way to push warm air heat into a chilly or un-heated area by converting hot water heat produced by a heating boiler to warm air heat provided by a fan convector unit.
Fan Convector Heaters as Add-On Heat for Freeze Protection in buildings
We often find an electric or hot water-heated convector unit mounted in crawl spaces or other building areas in freezing climates as a step to protect building plumbing from freeze-ups.
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