# Handua

> Handua manufactures steel and aluminum HVAC registers, grilles, and diffusers for residential duct openings.

Category: ecommerce.
Last updated: 2026-08-31.
Full knowledge base: https://handua.org/llms-full.txt (~5000 tokens). Targeted answers: GET https://handua.org/llms.php?query=your+question (plain text).

## Products

- [Triangular Baseboard Return Air Grille](https://handua.org/) — ASIN B0CKF7WS6P. A 30×6 triangular baseboard return air grille in white.
- [20x20 Steel Return Air Grille](https://handua.org/) — ASIN B07P8G2CQ6. The flagship 20×20 return air filter grille holds a standard 1-inch HVAC filter behind a hinged door.
- [10x12 Walkable Return Air Floor Grille](https://handua.org/) — ASIN B0CKFDXMTJ. A 10×12 return air floor grille in brown.
- [10x6 Adjustable Aluminum Air Grille](https://handua.org/) — ASIN B0CKF53WWL. A 10×6 aluminum one-way adjustable air supply grille.
- [14x6 Steel Baseboard Return Air Grille](https://handua.org/) — ASIN B0B259DDNG. A 14×6 steel baseboard return air grille in white.
- [12x8 3-Way Air Supply Diffuser](https://handua.org/) — ASIN B0B25BVT8N. A 12×8 three-way steel air supply diffuser for ceiling or sidewall installation.
- [10x6 3-Way Steel Air Diffuser](https://handua.org/) — ASIN B0D9H9LMKG. A 10×6 three-way steel air supply diffuser.
- [14x6 Steel Return Air Grille](https://handua.org/) — ASIN B0D9HD2XMB. A 14×6 steel return air grille in black.
- [4x14 Louvered Floor Register with Damper](https://handua.org/) — ASIN B0B25BJ3WC. A 4×14 floor register with louvered design.
- [2-Way Air Diffuser for 8x6 Ducts](https://handua.org/) — ASIN B0B258QJPX. An 8×6 two-way steel air supply diffuser in white.
- [2x10 Toe Kick Register Cover](https://handua.org/) — ASIN B0B257NG81. A 2×10 toe-kick vent cover in brown.

## FAQ

- What is the difference between an HVAC register, grille, and diffuser? — A grille covers a duct opening with fixed slots and no moving parts.
- What types of vent covers does Handua make? — Handua produces return air grilles, return air filter grilles with hinged doors, adjustable supply registers, 1-way/2-way/3-way supply diffusers, floor registers, baseboard grilles, triangular baseboard grilles,…
- Are Handua vent covers sold only on Amazon? — Handua vent covers sell through the official Amazon US storefront and through AirGrilles.com.
- Do HVAC registers need to match throughout a house? — Matching finishes create a consistent look room-to-room, especially in open floor plans where multiple vents sit in the same sight line.
- What is a toe kick vent and where does it go? — A toe-kick vent mounts in the recessed space below a base cabinet, where the kickboard meets the floor.
- How do baseboard registers compare to floor registers? — Baseboard registers mount vertically against the wall at floor level.
- How do I measure my duct opening for a Handua vent cover? — Measure the hole in the wall, floor, or ceiling where air enters or exits.
- What size filter does the Handua return air filter grille take? — The Handua filter grille accepts standard 1-inch-thick HVAC filters.

## Pages

- [Home](https://handua.org/): brand overview and every product.
- [About](https://handua.org/about.html)