Rheem · ThermaForce condensing tankless · Gas tankless
Rheem ThermaForce CRTGH-L199i
The Rheem ThermaForce CRTGH-L199i is an indoor condensing natural gas tankless water heater published by Rheem at up to 0.90 UEF and 10.1 GPM, with a single-pass Labyrinth heat exchanger and four moving parts.
Key figures
- Max input
- —
- Flow at unspecified rise rise
- 10.1 GPM
- Uniform Energy Factor (UEF)
- 0.9
Flow figures depend on temperature rise; compare only at the same rise. Max flow is not guaranteed winter performance.
Rheem ThermaForce CRTGH-L199i in practice
The CRTGH-L199i is the published model of the Rheem ThermaForce condensing tankless family. It is listed at 10.1 GPM in a 17 inch wide by 29 inch high by 10 inch deep cabinet in natural gas and propane, with Rheem publishing up to 0.90 UEF and ENERGY STAR qualification. Rheem describes a single-pass Labyrinth heat exchanger with an integrated copper waterway and states the unit stands up to extreme hard water applications.
Rheem states the design has only four moving parts: the fan, mixing valve, gas valve and damper, and that the units use universal shared platform parts for easier diagnosis and service. The published features include a built-in illuminated touchscreen control panel, wireless RF cascading to balance the workload of several units without Wi-Fi, a moveable combustion air intake for left or right routing, extra-long pipe fittings with notched sides, and the ability to flex vent in existing B-vent. The residential warranty is 15 years on the heat exchanger with 5-year parts and 1-year labour.
WaterHeating.ca records the efficiency as the published UEF and does not convert it to a legacy EF. The 10.1 GPM figure is a manufacturer rating with no stated temperature rise, so it is not winter delivery; tankless sizing depends on the incoming water temperature, the temperature rise and simultaneous fixture demand. Whether CANRO supplies this model and performs a gas tank-to-tankless conversion is confirmed at consultation.
Best suited to
- Homes converting from a storage tank that want a condensing unit with fewer serviceable parts
- Properties where the vent route can use existing B-vent or a sealed PVC termination
- Multi-unit or high-demand layouts that can stage several units with wireless RF cascading
Limitations to know
- The 10.1 GPM figure has no stated temperature rise and is not winter delivery
- Domestic recirculation is not published for this model
- Requires 120 V power; no hot water during an outage
- Needs a condensate drain and an approved vent route
- Hard-water scale still requires maintenance; the unit's hard-water tolerance is not a substitute for servicing
Applicability and support
- Model number
- CRTGH-L199i
- Variants on this page
- None
- Canadian availability
- available
- Production status
- current
- CANRO supplies
- Confirmed at consultation
- CANRO services
- Confirmed at consultation
- Recirculation
- Not published
- Warranty
- Series terms
Rheem does not state domestic recirculation capability for the ThermaForce on the product page. Its published multi-unit feature is wireless RF cascading, which stages several units together and is not the same as a hot-water recirculation loop.
Where CANRO provides on-site service
On-site service is currently offered across Metro Vancouver: Vancouver, Burnaby, Richmond, Surrey, Coquitlam, North Vancouver, West Vancouver, New Westminster, Delta, Langley, Port Moody, Port Coquitlam, Maple Ridge, Pitt Meadows, White Rock, Tsawwassen; plus Anmore, Belcarra, Lions Bay, Bowen Island, Abbotsford with travel or ferry arrangements confirmed by phone. Everything else on this site is reference information you can use anywhere in Canada.
Specifications
Published specifications
Values as published by Rheem. Manufacturer gallon and BTU/h figures are preserved with metric alongside; notes flag conflicting documents and missing figures. Groups expand for detail.
Flow (tankless) 1
| Specification | Value | Note |
|---|---|---|
| Published flow (CRTGH-L199i) | 10.1 GPM at unspecified rise rise | Rheem prints 10.1 GPM for this model. The temperature rise behind the figure is not stated on the product page, so it must not be read as winter delivery. |
Efficiency 1
| Specification | Value | Note |
|---|---|---|
| Uniform Energy Factor (UEF) | 0.9 | Rheem publishes up to 0.90 UEF with ENERGY STAR qualification. UEF is the current federal metric and is not converted here to a legacy EF. |
Venting and air 1
| Specification | Value | Note |
|---|---|---|
| Venting | Flex vent in existing B-vent; moveable combustion air intake (left or right) | Rheem states the unit can flex vent in existing B-vent and the combustion air intake can be routed left or right. The installation manual governs approved materials and lengths. |
Physical 3
| Specification | Value | Note |
|---|---|---|
| Height | 29 in (737 mm) | Published cabinet dimensions; the installation manual governs clearances and service space. |
| Width | 17 in (432 mm) | |
| Depth | 10 in (254 mm) |
Operating limits 1
| Specification | Value | Note |
|---|---|---|
| Listings shown by Rheem | CSA Low Lead Compliant, CSA (C/US) and AHRI marks on the product page | Reproduced from the Rheem Canada product page; the rating plate governs the installed unit. |
Other 2
| Specification | Value | Note |
|---|---|---|
| Multi-unit operation | Wireless cascading over RF; no Wi-Fi required | Rheem states the units cascade wirelessly to balance the workload of each unit. This is a staging feature for multiple units, not domestic recirculation. |
| Fuel | Natural gas or propane | Listed by Rheem in both natural gas and propane. The model is ordered for the fuel supplied. |
Manuals
Maintenance the manufacturer specifies
Not documented yet.
Fault codes documented for this model
None documented yet.
Services
Hot water and scalding
- Water above 49 °C at a tap can scald in seconds, and children and older adults are at most risk. BC's plumbing code limits shower and bathtub water to 49 °C.
- Storage tanks are normally kept hotter (Health Canada advises 60 °C) to limit Legionella growth, with a thermostatic mixing valve tempering the water to the fixtures.
- Never bypass or remove a mixing valve, thermostat or high-limit control to get hotter water.
Official guidance: Government of Canada on water temperature and scalds and HealthLinkBC.
Frequently asked questions
Is the Rheem ThermaForce CRTGH-L199i sold in Canada?
Yes. Rheem Canada lists the ThermaForce condensing tankless family with model CRTGH-L199i on its Canadian tankless product listing.
What is the ThermaForce Labyrinth heat exchanger?
Rheem describes it as a single-pass Labyrinth heat exchanger with an integrated copper waterway, designed for maximum heat transfer with minimal heat loss, and states the unit has only four moving parts: the fan, mixing valve, gas valve and damper.
Does the ThermaForce support recirculation?
Rheem does not state domestic recirculation capability for the ThermaForce on the product page. Its published multi-unit feature is wireless RF cascading, which stages multiple units together and is not the same as a hot-water recirculation loop.
Questions about the Rheem ThermaForce CRTGH-L199i?
Describe what the water heater is doing and get a straight answer about the next step.
On-site service in Metro Vancouver, BC. Call to check availability.
Sources and verification
- Rheem Canada — ThermaForce product page (up to 0.90 UEF, ENERGY STAR, 10.1 GPM, 17 x 29 x 10 in cabinet, single-pass Labyrinth heat exchanger, four moving parts, wireless RF cascading, illuminated touchscreen control, flex vent in existing B-vent, residential 15-year heat exchanger / 5-year parts / 1-year labour) · Canadian source · accessed September 21, 2026
- Rheem Canada — Tankless water heaters (family listing, ThermaForce 10.1 GPM, natural gas and propane) · Canadian source · accessed September 21, 2026
- CANRO Heating & Cooling — Contact (brands serviced) · Canadian source · accessed September 7, 2026
Facts checked September 21, 2026. Last updated September 21, 2026. Technical reviewer: not yet assigned.