Tankless Water Heaters

(Showing 1 of 1)
On-Demand Hot Water • High Efficiency

Water Heaters - Tankless

The Tankless Water Heaters category includes advanced on-demand water heating systems that deliver endless hot water, superior efficiency, and a compact installation footprint. Unlike traditional tank heaters, tankless systems heat water only as it’s needed—reducing energy waste, minimizing standby heat loss, and freeing up valuable mechanical room or wall space. Tankless units are ideal for single- family homes, multi-bathroom residences, condos, restaurants, salons, shops, and small commercial applications where space-saving, performance, and reliability matter.

Within this category you'll find natural gas, propane, and electric tankless heaters designed to meet a range of flow-rate and temperature-rise requirements. Many models feature condensing heat exchangers, stainless-steel combustion chambers, low-NOx burners, digital controllers, Wi-Fi monitoring, recirculation compatibility, and scale mitigation systems for extended service life. Contractors and advanced homeowners can compare max GPM output, efficiency ratings, venting type, and installation clearances to ensure correct sizing for any project.

  • Gas and propane condensing tankless units with high efficiency and low emissions.
  • Electric tankless heaters for point-of-use or full-home applications.
  • Commercial-ready tankless systems for shops, cafés, and small businesses.
  • Recirculation-ready models for instant hot water at fixtures.
  • Venting, scale filters, and installation accessories to complete the job.

When selecting a tankless water heater, evaluate flow rate (GPM), temperature rise, gas line and breaker capacity, venting path, recirculation needs, fixture count, and simultaneous hot-water demand. Use the Compare tool to review GPM output at different inlet temperatures, UEF efficiency, modulation range, vent type, installation orientation, and warranty coverage.

Pro tip: Before ordering, document gas line size, existing vent diameter and material, electrical capacity, water hardness levels, available wall space, and distance to fixtures. Photos of the current setup make it easy for us to recommend the best tankless heater and accessory kit for long-term performance with minimal callbacks.

High-efficiency tankless water heater installed on wall

Tankless Water Heaters Category Overview

Tankless Water Heaters deliver high-efficiency on-demand hot water for residential and light- commercial installations. Compare GPM flow rate, temperature rise, fuel type, venting requirements, recirculation options, Wi-Fi controls, and condensate management accessories.

Compare
Duncan L purchased: for 5 minutes ago.
Alex M purchased: for 16 minutes ago.
Paul W purchased: for 19 minutes ago.
Sam P purchased: for 27 minutes ago.