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Low Temperature Hydronic Unit Heater


Horizontal delivery low temperature unit heaters are the most popular of all types. These units are ideal for heating buildings with large open areas and low ceilings. In high ceiling open areas we recommend using stratification fans with these units. They are used to counter heat loss along outside building walls, especially where windows are present.


  1. Connections – Female type permits direct connection of unit heater to the piping and eliminates the need for additional fittings.
  2. Water or PG Mixture temperature can be as high as 180°F, however Unit Heaters are rated for 122°F Supply Fluid Temperature.
  3. Vertical Fins – Less opportunity for dust and dirt to collect. Reduces cleaning. Fins die-formed for added strength and heat transfer.
  4. Coil – All air passes through coil. Heating is uniform. Design assures maximum control over air delivery and temperature of air leaving the heater. Aluminum fins die-formed for added strength – increased heat transfer. Fins mechanically bonded to serpentine copper tube.
  5. Motor – All motors are enclosed air over. Single phase and explosion-proof types include built in thermal overload protection. Selected and tested for operation on specific unit heater models. All motor wiring is terminated in an electrical junction box either supplied on the unit heater casing, or as an integral part of the motor.
  6. Fan – Lightweight. Blades accurately balanced and pitched to move air quietly and positively – with minimum power requirement.
  7. Deflector Blades – Adjustable horizontal air-deflector blades are standard. 
  8. Safety Fan Guard – Standard equipment. Bolted to rear casing, steel rod fan guard completely surrounds the fan offering constant protection.
  9. Casings – Baked-on gray-green polyester or Hammertone Beige powdercoat paint is applied over rust-and corrosionresistance- treated steel for long life.