RL Models

RL Tankless Models: Select by Winter Flow and Installation Type

RL models are gas-fired non-condensing tankless water heaters that heat domestic water as it flows through the appliance. The listed RL75 and RL94 variants differ by capacity, indoor or outdoor configuration and fuel type.

Narrow the model before comparing price

The suffix and operating conditions matter as much as the series name. These decisions establish which models can realistically serve the project.

Compare usable demand, not maximum flow alone

Add the hot-water demand of fixtures likely to run together and review the manufacturer's performance curve. A higher maximum flow does not guarantee every shower and filling task can operate simultaneously in winter.

Confirm natural-gas or propane specification and the complete generation. Recirculation capability, controls and venting must be verified from the chosen model's documentation; non-condensing RL equipment should not inherit features from newer condensing families.

Include venting and gas work in the replacement quote

A tank-to-tankless conversion may require gas-line assessment, electrical supply, approved vent routing, water-pipe changes and service valves. The heater's connection size alone is not a gas-pipe sizing calculation.

For replacement, inspect existing vent components and water condition before retaining them. Include access for flushing and inlet-filter care, and confirm parts and model availability for older listings. A low equipment price can be outweighed by a difficult vent route.

Build a winter-based model comparison

Bring fixture information and photographs of the current installation. These checks support a more accurate equipment and installation proposal.

Choose the RL model using verified demand and site requirements. Compare a non-condensing replacement with alternatives on total installation scope, not appliance price alone.