TruAire 18 in. Baseboard Diffuser Supply-H118SW - The Home Depot
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Model # H118SW

Internet # 202528154

Store SKU # 412306

18 in. Baseboard Diffuser Supply

TruAire 18 in. Baseboard Diffuser Supply

This item has been discontinued.
The Home Depot no longer carries this specific product.

$12.28 / each


Model # H118SW

Internet # 202528154

Store SKU # 412306

The H118SW is a 18 in. baseboard return air diffuser used for baseboard openings. This diffuser returns air to your home and offers a subtle baseboard design. One simple pull of the latch and the single damper will close quietly and smoothly. Our product is constructed to ensure maximum airflow and compliment your home decor. Using our product to outfit your ventilation system will improve your home air circulation.

  • Allows air to flow freely between your ventilation system and a room
  • Made of high quality steel
  • White powder coat finish
  • High quality steel components


Assembled Depth (in.) 
2.75 in 
Assembled Height (in.) 
4.5 in 
Assembled Width (in.) 
18 in 
Maximum duct height (in.) 
4 or less 
Maximum duct width (in.) 
16-1/8 to 20 
Outside Length 
18 in 
Outside Width 
2.75 in 
Air deflection 
Color Family 
Product Weight (lb.) 
2.05 lb 
Warranty / Certifications
Manufacturer Warranty 


Rated 4.2 out of 5 by 31 reviewers.
Rated 5.0 out of 5.0 by Great looking, really update our home We really like the look of having new baseboard vents in our home that was just remodeled. The price was a pleasant surprise, so much so our son is replacing his vents for your new bright white ones! Thanks April 21, 2015
Rated 5.0 out of 5.0 by good diffuser it served its purpose, was easy to install and I am happy with it. April 14, 2015
Rated 3.0 out of 5.0 by Needs Instructions But Overall Good Product Thankfully I was able to find this installation video on YouTube because I couldn't figure it out for the life of me. May 29, 2014
Rated 5.0 out of 5.0 by The 18 in. baseboard diffuser worked wonderfully for me! I am a 72 year old woman who is redecorating my foyer and my old register was coated not only with thick white paint but also rust that was causing the paint to peel. This register was easy to install and I didn't have to paint it before installing. Fit perfectly and looks fantastic. April 15, 2014
Rated 4.0 out of 5.0 by Replacement. Looks good. Great value for the money. Purchased as a replacement for a remodel. July 21, 2014
Rated 5.0 out of 5.0 by good value fits well and can be painted to match baseboard trim February 10, 2015
Rated 5.0 out of 5.0 by Much needed purchase The diffuser was very easy to install. It is something I have needed for a while but afraid I would not be able to install correctly but it was very simple to do and looks really great. It directs the heat on the floor instead of going straight up like before. I love my Homedepot. February 3, 2015
Rated 5.0 out of 5.0 by Good replacement I live in an older home and needed to replace the baseboard registers. I tried several stores and did not find the correct style until I found these. They work great and were easy to install. I did not have to modify the baseboards. I just removed the old and replaced with the new one's. March 4, 2014
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