Rheem RTGH condensing tankless (RTGH-84/95, Performance Platinum ECOH): quick sheet

Covers: Rheem RTGH 'Super High Efficiency' condensing indoor tankless: RTGH-84DVLN, RTGH-95DVLN (current suffix -3), Wi-Fi versions RTGH-95DVELN-3, and the similar Performance Platinum ECOH160DVLN-3 with EcoNet and LeakGuard. RTG (non-condensing) is a different line.

Single sourceBrands: Rheem, Ruud6 components

Rheem's big-box and wholesale condensing tankless. Identify by the RTGH or ECOH prefix, a digital temperature display, PVC venting and a condensate drain. Many installs are DIY-adjacent, so venting, gas sizing and scale are frequent root causes.

Safety first

Gas, combustion and venting are blocked.
Disconnect 120 V before opening.
Scald risk at 140 °F settings.

How it works

Flow above the activation threshold starts the combustion sequence; input modulates from about 11,000 up to 199,900 BTU/h on the 95 model.

A condensing secondary heat exchanger recovers flue heat; condensate must drain.

Set temperature range on the display is about 100-140 °F; maximum water temperature is 140 °F.

The display shows a maintenance or service code when it detects a fault; Wi-Fi models report through EcoNet.

Components & tests

Unlock all 6 components, specs, service mode and teardown

Full library + AI assistant for $34.90, one time.

Get lifetime access

Official manufacturer documentation

Always confirm values against the tech sheet for the exact model.

OnCall Tech is a reference tool for trained technicians and can make mistakes. Always disconnect power and confirm with the manufacturer's documentation before you work. © 2026 OnCall Tech. Original content; not a reproduction of any manufacturer document.Generic part photos (not of this brand): Clothes dryer with its vent duct in a small laundry closet by Introspectivedsgn, Pexels License

Diagnostic guides for this appliance

Guide · Water Heater

Heat-pump (hybrid) water heater: slow recovery, noise, errors

Hybrids need enough room air and a clean air filter, a working condensate drain and the right mode. Many complaints are mode settings or a dirty filter. Refrigerant faults are sealed-system work.

5 steps ~60 minmoderate

Guide · Water Heater

Tankless water heater descaling (flush)

Scale insulates the heat exchanger, causing overheat codes and fluctuating temperature. Flush with a pump and descaling solution through the isolation valves.

5 steps ~75 mineasy

Guide · Water Heater

Hot water recirculation pump problems

Check timer/settings, check valves, air in the loop and the pump itself. On tankless units with built-in pumps, a recirculation code may point to air or a leak in the loop.

5 steps ~60 minmoderate

Other water heaters manuals

Manual · Water Heater

Rheem Performance / Performance Platinum electric tank (XE-series): quick sheet

Rheem Performance Platinum electric tanks sold at big-box stores with model numbers starting XE (e.g. XE50T12ST45U1 with 4500/4500 W elements, XE50T12EC55U1 with 5500/5500 W elements and LCD touch control, XE50T12CS45U0 / CS55U1 'Gladiator' trim with LeakGuard and built-in EcoNet). The '12' in the model is the 12-year warranty tier. Exact production years not confirmed; date the unit from its rating plate.

7 components4 common failuresRheem

Manual · Water Heater

Bradford White RE (electric) and RG (gas) residential tanks: quick sheet

Bradford White residential upright and lowboy tanks: RE-prefix electric (e.g. RE250T6 = 50 gal tall) and RG-prefix atmospheric gas (Defender Safety System). Sold through plumbing wholesalers, not big-box stores. Newer ERE models with ICON E electronic control are a different platform. Date from the serial number letters (see below).

7 components3 common failuresBradford White

Manual · Water Heater

Rinnai RU / RUR (SENSEI) condensing tankless: quick sheet

Rinnai condensing residential tankless: RU-series (RU199iN/eN, RU180, RU160, RU130; indoor 'i' and outdoor 'e'), RUR models with built-in recirculation. Older non-condensing RL / V-series and RE models differ. Rinnai serial numbers encode year then month in the first four digits.

7 components4 common failuresRinnai