Switch to Demand Duo®
Easy installation, superior performance and longer life mean there has never been a better time to switch from traditional tanks to the consistency and efficiency of Demand Duo H- and R-Series solutions.
Demand Duo® Benefits
Flexible Installation
Features a preassembled gas connection with an installed drip leg and swivel flex line allowing for quick and hassle-free installation.
A Better Value
Demand Duo® delivers more value than standard tanks, including a lower cost of ownership, energy-saving performance, and abundant hot water when you need it.
2X the Warranty
Unlike most condensing tank type heaters, Demand Duo offers a 6-year warranty on the tank.
How it Works
How Demand Duo Works
Water heats in the tankless unit rather than inside the tank, providing:
- Zero thermal stress on the tank.
- More hot water capacity, since tank only holds two magnesium anode rods.
- Easy, cost-effective tankless maintenance verses replacing an entire tank every few years.
- Ideal for emergency replacement; installs like a tank, but over 100 lbs lighter than most tanks.
Demand Duo® Solutions
Demand Duo®
H-Series
Bringing a multitude of installation options as well as an upgraded recovery pump for improved tank recovery time.
- Direct Replacement for High-Efficiency Tanks
- Preassembled electric and gas connections
- Heats Water in Tankless | Zero Thermal Stress on Tank
Demand Duo®
R-Series
Our Non-Condensing Hybrid brings the performance, versatility, and reliability of Rinnai-backed by the Industry’s best warranty.
- Cold Water Inlet Connection at the top of the tank
- Pre-Installed Exhaust Connector
- Included 3-Piece 6” Vent Accessory Kit
Demand Duo® 2V
Combining the redundancy and performance of our tankless rack systems with the hybrid technology of Demand Duo®.
- Two tankless units and two pumps for maximum performance, redundancy, and reliability
- Delivers 551 Gallons in the First Hour at 100° F Delta T
- ASME certified option available
