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Enjoy fast and free shipping on all orders over $89! Contact us (855) 424-4376

Tankless Water Heaters

Tankless water heaters deliver endless hot water with compact, energy-smart designs. Shop gas (natural gas or LP) and electric models from Rinnai, Rheem, Stiebel Eltron, Eemax, and Chronomite—plus venting, recirculation, controls, and repair parts to finish the job.

Shop by need

Fuel & power: Natural Gas and Propane; Electric 120V or 240V point-of-use and whole-home
Model type: Condensing and Non-condensing; Indoor or Outdoor; Combination units
Recirculation: built-in recirc pump models, add-on pumps, pump hardware, controllers, and WiFi control accessories
Venting: concentric and twin-pipe kits, terminations, pipe covers, and heater guards
Kits & parts: NG/LP conversion kits, descaler/flush kits, repair parts, cables, and accessories
Series callouts: Rinnai Sensei CX and Sensei RX series options

Quick choosing guide

Size by flow: estimate peak demand in GPM at your winter inlet temperature rise. Whole-home gas units often cover 5–11+ GPM; electric point-of-use fits sinks and small loads.
Pick fuel & placement: Gas for highest flow; choose indoor with proper venting or outdoor where climate allows. Electric units need the correct amperage and breakers.
Efficiency: select condensing for higher efficiency and cooler exhaust; plan condensate drain where required.
Faster hot water: choose a model with a built-in recirc pump or add a recirc kit and controller.
Complete the install: vent kit and terminations for gas models; isolation/service valves; pipe covers; WiFi or wall controllers. Use NG/LP conversion kits only as specified.
Maintenance: add a descaler/flush kit and schedule periodic cleaning to protect the heat exchanger.

Pro tips: Size for the coldest inlet temperature, verify gas line BTU capacity and vent route for NG/LP models, or breaker/wire size for electric units. Install isolation valves for easy flushing, set recirc schedules to cut wait time, and winterize outdoor units where required.

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