Rinnai RGB-CTWH-3 Recess Box for RUS Tankless Water Heaters
- Authorized Online Dealer
- Free Shipping (exclusions may apply)
- We Beat The Lowest Price
- Fast 4–7 Day Delivery
- Manufacturer Warranty Included
- Questions? Call Our Experts: +1 (800) 484-0224
Rinnai RGB-CTWH-3 Recess Box for RUS Tankless Water Heaters is backordered and will ship as soon as it is back in stock.
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Price Match Guarantee
Price Match Guarantee
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Delivery and Shipping
Delivery and Shipping
Your order processing time is 1 to 2 days. Please note that the cut-off time for order placement is 6 p.m. Orders received after this time will be processed on the following business day.
Your order will arrive within 4 to 7 days on average (free shipping over $200). Shipping for orders under $200 incurs a flat fee of $15. We currently offer shipping only within the continental United States (island deliveries may incur additional costs); international shipping is not available.
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Rinnai RGB-CTWH-3 Recess Box for RUS Tankless Water Heaters
• Authorized Online Dealer
• Free Shipping + No Sales Tax (exclusions may apply)
• We Beat The Lowest Price
• Fast 4-7 Day Delivery
• Manufacturer Warranty Included
• Questions? Call Our Experts: +1 (800) 484-0224
Payment & Security
Payment methods
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
Description
Description
Upgrade your Rinnai tankless water heater installation with the Rinnai RGB-CTWH-3 Recess Box, expertly designed for RUS model units. Engineered for precision, this recess box protects your appliance from harsh outdoor conditions while maintaining a clean, seamless aesthetic.
Built to enhance both function and appearance, the Rinnai Recess Box conceals the water heater within your wall, shields it from weather exposure, and allows for simple access when servicing is required. Perfect for residential or commercial installations, it helps extend product longevity and ensures consistent performance.
With Rinnai’s Common Venting System, multiple water heater units (up to 8) can share a single vent, reducing wall cuts, installation time, and material costs — making this recess box an essential accessory for efficiency and durability..
Key Features:
- Designed for RUS Models Only – Ensures a perfect fit with Rinnai RUS tankless water heaters.
- Weather Protection – Shields the appliance from wind, rain, and environmental elements.
- Flush-Mounted Installation – Recesses the unit into the wall for a cleaner, concealed look.
- Improved Drainage – Front drain holes enhance water flow and prevent buildup.
- Easy Maintenance – Removable front door provides full access for service and adjustments.
- Durable Construction – Built for long-lasting protection and performance in any environment.
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Flexible Venting Design – Supports Rinnai Common Venting with up to 8 connected units.
What’s Included![]()
- 1 × Rinnai RGB-CTWH-3 Recess Box
- Installation hardware set
- Removable front access door
- Manufacturer installation guide
Specifications:
| Specification | Details |
|---|---|
| Product Name | Rinnai Recess Box |
| Part Number | RGB-CTWH-3 |
| Compatible Models | Rinnai RUS Tankless Water Heaters |
| Installation Type | Wall Recessed (Flush Mount) |
| Material | Weather-Resistant Metal |
| Drainage System | Front-Facing Drain Holes |
| Access | Removable Front Door |
| Color/Finish | White Powder-Coated |
| Dimensions (Approx.) | 22” H × 14” W × 8” D |
| Weight | 12 lbs (approx.) |
| Mounting | Wall-Mounted |
| Manufacturer Warranty | 1 Year Limited Warranty |
Care & Maintenance Instructions
- Clean the exterior with mild soap and water — avoid abrasive cleaners.
- Inspect drain holes periodically to ensure clear water flow.
- Check mounting hardware annually to ensure secure installation.
- Keep access door closed to prevent debris and weather exposure.
- If located in coastal or high-moisture environments, apply anti-corrosion protection annually.
Let customers speak for us
The rugged rock-like exterior blends beautifully into our deck design. The seating for six is spacious, and the 10 therapy jets deliver smooth and relaxing streams. Heats quickly and hides all the mechanicals underneath. Totally exceeded our expectations.
much better than our old open fireplace
We love it! It looks very realistic!
Love the tropical vibes it brings to my backyard. Worth every cent. Fast ship and great service.
Peaceful water sound and super easy to maintain.
Looks great in the living room. It puts out really nice flames.
This massive waterfall made our pool feel like a resort. The roar of that cascade is hypnotizing and the finish looks incredibly lifelike. We chose brown rock and it blends perfectly. Installation needed 3 people, but totally worth it.
Does exactly what it’s supposed to do.
Looks incredible in the backyard. Setup wasn’t hard
This grill is a beast! Super high quality.
We sold our wood unit for this, and haven’t looked back. Easy pilots, no mess, looks great
Works well. Sent in a timely manner. Cheapest online too!
Installation was extremely easy. Came with all the equipment needed!
We wanted something tropical, this fit perfectly!
