Find the Right Rinnai Tankless Water Heater

With so many great options it can be hard to select the right tankless water heater. Tell us a little bit about your home and we can suggest a few products for you.

This sizing is intended as a guide only and not a replacement for a professionally engineered project. This sizing is not intended to describe a complete system; it is up to the contractor/engineer to determine the necessary components for and configuration of the particular system being installed. The sizing does not imply compliance with local building codes. It is the engineer/contractor responsibility to ensure the installation is in accordance with all local building codes. Confer with local building officials before installation. 

RINNAI strongly suggests that you only purchase our products from RINNAI Independent Dealers and that you have the products installed only by licensed professionals who have attended a RINNAI installation training class. If your RINNAI product was not purchased through a RINNAI Independent dealer and properly installed by a RINNAI trained licensed professional or if it has been altered or modified, it may not be covered under RINNAI's Limited Warranty. Please see our Limited Warranty for full details. To locate a Rinnai-trained dealer in your area please visit our Dealer Locator.

These product recommendations are based on the following assumptions:

  • Shower heads assumed to be 2.5 GPM mixed flow rate

  • One shower head per full bathroom 

  • All showers or comparable fixtures will operate simultaneously 

Rinnai America Corporation, its agents, employees, directors, officers, parent or affiliate companies assume no liability for damages arising from information provided herein to or by consumers or third parties or for damages arising from or associated with water quality, compliance with local codes, installation methods, materials or other circumstances related to application or installation.