Takagi TK-540P-PEH
The Takagi TK-540P-PEH is a condensing tankless water heater — a DHW-only appliance, not a boiler — firing 13,000 to 199,000 BTU/h on propane with 0.95 UEF and up to 10 GPM.
Key figures
- Max input
- 199,000 BTU/h
- Max CSA output
- —
- AFUE
- —
- Min input
- 13,000 BTU/h
Input is gas energy consumed; output is heat delivered. Never size from input alone.
Takagi TK-540P-PEH in practice
The TK-540P-PEH is the propane outdoor model in Takagi's TK-540P tankless water heater family. Takagi — TK-540P Specification Sheet (TRGSS00116) prints an input range of 13,000 to 199,000 BTU/h with 0.95 UEF, up to 10 GPM maximum flow, 3/4" NPT water connections and a 3/4" NPT gas connection.
The unit measures 23-5/8 × 17-3/4 × 11-1/4 in and weighs 69 lb, and it is installed outdoors. Outdoor model; power direct vent design per the specification sheet. It is a tankless water heater, not a boiler: Takagi's catalogue contains no boiler line, and where the family is used with storage tanks, recirculation or combined domestic & heating applications, the appliance remains a water heater whose installation and system design follow the official manual and local code.
ENERGY STAR qualified per the specification sheet. No Canadian availability statement appears on the captured pages, so Canadian availability is recorded as unknown. Sizing, venting design and gas-supply capacity are engineering decisions for a licensed contractor following the current installation manual.
Best suited to
- Outdoor domestic hot-water service at up to 199,000 BTU/h input
- Projects needing 0.95 UEF operation with up to 10 GPM
- Residential systems that can manifold units for additional capacity
Applicability and support
- Model number
- TK-540P-PEH
- Canadian availability
- unknown
- Production status
- current
- ROMA supplies
- Confirmed at consultation
- ROMA services
- Confirmed at consultation
- Warranty
- Not verified
Where ROMA provides on-site service
On-site service is currently offered in Greater Vancouver, BC, including Vancouver, Burnaby, Richmond, Surrey, Coquitlam, North Vancouver, West Vancouver, New Westminster, Port Coquitlam, Port Moody, Delta, Langley, Maple Ridge, Abbotsford, Chilliwack, White Rock, Pitt Meadows, Tsawwassen, Anmore, Lions Bay, Belcarra, Bowen Island, Mission. Everything else on this site is reference information you can use anywhere in Canada.
Specifications
Published specifications
Values as published by Takagi. Units are shown with every value; notes flag conflicting sources or missing figures.
| Specification | Value | Note |
|---|---|---|
| Input | ||
| Input, maximum | 199,000 BTU/h | As printed in Takagi — TK-540P Specification Sheet (TRGSS00116). |
| Input, minimum | 13,000 BTU/h | As printed in Takagi — TK-540P Specification Sheet (TRGSS00116). |
| Efficiency | ||
| Uniform Energy Factor (UEF) | 0.95 UEF | As printed in Takagi — TK-540P Specification Sheet (TRGSS00116). |
| Domestic hot water | ||
| Maximum flow rate | 10 GPM | Factory-tested maximum; 0.4 GPM required for continuous fire after ignition (0.5 GPM activation on commercial sheets). |
| Venting and air | ||
| Venting | Outdoor model; power direct vent design per the specification sheet | |
| Physical and connections | ||
| Hot/cold water connections | 3/4" NPT | |
| Gas connection | 3/4" NPT | |
| Dimensions (H × W × D) | 23-5/8 × 17-3/4 × 11-1/4 in | |
| Weight | 69 lb | As printed in the specification sheet. |
| Operating limits and other | ||
| Installation | Outdoor | |
| Technology | Condensing tankless water heater | |
| Recirculation | Integrated recirculation pump | Per the specification sheet; indoor models include integrated temperature and pump controls. |
| Manifold capability | Easy-Link with up to three other T-H3 units; common vent up to 8 units | As printed in the specification sheet. |
Manuals
- Takagi — TK-540P Specification SheetTRGSS00116
Alerts documented for this model
None documented yet.
Frequently asked questions
Is the Takagi TK-540P-PEH a boiler?
No. It is a tankless water heater (DHW-only). Takagi's catalogue contains no boiler line; where the family is used with hydronic or radiant systems, the appliance is still a water heater and the system must be designed by a licensed contractor.
What is the input range of the TK-540P-PEH?
Takagi — TK-540P Specification Sheet (TRGSS00116) prints 13,000 BTU/h minimum and 199,000 BTU/h maximum input on propane, with up to 10 GPM and 0.95 UEF.
Where can I find the official documentation for the TK-540P-PEH?
The specification sheet TRGSS00116 is served from takagi.com (https://www.takagi.com/media/62092/TRGSS00116.pdf), and the product page https://www.takagi.com/products/tankless-water-heaters/tk-540p-peh lists the installation and owner's manuals.
Questions about the Takagi TK-540P-PEH?
Describe what the boiler is doing and get a straight answer about the next step.
On-site service in Greater Vancouver, BC. ROMA lists “Open 7 days” on its site; call to confirm same-day availability.
Sources and verification
- Takagi — TK-540P Specification Sheet · TRGSS00116 · accessed September 9, 2026
- Takagi — TK-540P-PEH product page · accessed September 9, 2026
Facts checked September 9, 2026. Last updated September 9, 2026. Technical reviewer: not yet assigned.