An Easy Retrofit for Return Air

Bedrooms that don't have any kind of return air pathways can create comfort, efficiency, and health and safety problems. Here's an inexpensive, easy-to-install device that solves the problem. For more info, see our article, An Easy Retrofit for Return Air From Bedrooms, at: https://www.energyvanguard.com/blog/easy-retrofit-return-air-bedrooms
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