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Heater Diffusers (12 Styles Available)

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Heater Diffusers (12 Styles Available)

  • Ships Factory Direct
  • Full Manufacturer Warranty
  • 30 Day Money Back Guarantee
  • Price Match Guarantee

Frequently Asked Questions

What is an HVAC diffuser?

An HVAC diffuser or heater diffuser is an HVAC accessory made to spread out heated air more evenly, increase heat coverage, and improve heat and energy efficiency. It can also be used to reduce the noise generated by a heater.

What is the difference between an HVAC diffuser and a grille?

A heater grille is placed on an HVAC system or ductwork to block objects from entering and typically comes with fixed plates. An HVAC diffuser is used for the uniform distribution of heated air and usually has adjustable fins.

How do I replace a heater diffuser?

Refer to your manufacturer’s guide first before following these general instructions:
  1. Unscrew the heater cover.
  2. Remove the screws from the heater diffuser as well as the diffuser from the duct fitting.
  3. Place the new diffuser against the duct fitting and secure it in place with the old screws.
  4. Attach the cover back to the heater.

How do I choose a heater diffuser size?

Most heater diffusers are made for specific heater models, so you have to check whether your manufacturer offers a compatible diffuser for your unit. Other things you may want to consider are the size of the area that needs heating and the height of the ceiling.

Heater Diffusers

Many heaters work well as they are, and often have in-built features and components that can maximize performance. However, not all heaters are alike, and depending on the layout of the space being heated, certain heaters need heater diffusers in order to work optimally.

Heater diffusers work by directing the flow of heated air from fan-forced heaters. Of course, different heater diffusers direct heated air in different directions and are suitable for different uses. For example, some can direct air to form a sort of air curtain over doorways and can also produce a rectangular heating pattern. Some are suitable for higher heater mounting heights, and some are more suitable for lower mounting heights. Others, meanwhile, can direct heat in such a way that it can cover a larger area. 

These diffusers are typically used with downflow unit heaters. They’re highly useful in spaces with complicated layouts, narrow rooms and corridors, and other spaces with specific heating needs. See the catalog below and find the right heater diffuser for your space!

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