Crown Phantom II Combi PHTM2136C
The Crown Phantom II Combi PHTM2136C heats at 13.6 to 120 MBH input and fires 13.6 to 136 MBH for domestic hot water at 95.0% AFUE, drawing up to 3.7/3.4/2.9 GPM at 70/77/90°F rises from the small 112 lb cabinet.
Key figures
- Max input
- 120 MBH
- Max CSA output
- —
- AFUE
- 95 %
- Min input
- 13.6 MBH
Input is gas energy consumed; output is heat delivered. Never size from input alone.
Crown Phantom II Combi PHTM2136C in practice
The PHTM2136C is the smaller Phantom II combi: space heating at 13.6–120 MBH input with a domestic hot water side firing 13.6–136 MBH, at 95.0% AFUE with 112 MBH DOE heating capacity and a 97 MBH net AHRI water rating (product ratings table; I&O manual 110331-10, 9/25). The DHW ratings table prints maximum draws of 3.7 GPM at a 70°F rise, 3.4 GPM at 77°F and 2.9 GPM at 90°F, with a 0.5 GPM minimum flow to initiate DHW demand; DHW ratings are not AHRI certified.
The combi carries the same stainless steel condensing platform and gas-adaptive 'PHTM II' control as the heat-only models (with the H10 DHW sensor fault in the diagnostics), and a low-loss header is included with the unit. It measures 16.3 × 17.8 × 29.8 inches at 112 lb shipping, connects on 1-1/4" sweat CH and 3/4" sweat DHW with 1/2" MPT gas, and vents in 2" to 70 ft or 3" with increaser to 135 ft. The DHW delivery figures decide the fit: 3.4 GPM at a 77°F rise is steady single-shower territory — a household with heavier simultaneous draws should size up to the PHTM2200C or add a tank.
Best suited to
- Homes replacing boiler and tank with one compact 112 lb appliance
- Households whose DHW peaks fit within the 3.4 GPM (77°F rise) continuous draw
- Low-to-mid heat-loss homes within the 120 MBH space-heating input
Applicability and support
- Model number
- PHTM2136C
- 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 Crown Boiler Co.. Units are shown with every value; notes flag conflicting sources or missing figures.
| Specification | Value | Note |
|---|---|---|
| Input | ||
| Space-heating input, minimum | 13.6 MBH | Minimum space-heating input per the ratings table (Table 3-1). |
| Space-heating input, maximum | 120 MBH | Maximum space-heating input per the ratings table (Table 3-1). |
| DHW input, minimum | 13.6 MBH | Minimum DHW input per the DHW ratings table. |
| DHW input, maximum | 136 MBH | Maximum DHW input per the ratings table (Table 3-1, I&O manual 110331-10). |
| Output | ||
| DOE heating capacity | 112 MBH | DOE heating capacity per the product ratings table. |
| Net AHRI water rating | 97 MBH | Net AHRI water rating (piping and pickup allowance 1.15) per the product ratings table. |
| Efficiency | ||
| Efficiency (AFUE) | 95 % | 95.0% AFUE per the product ratings table. |
| Domestic hot water | ||
| DHW draw at 70°F rise | 3.7 GPM | Maximum DHW draw at a 70°F rise per the DHW ratings table (DHW ratings not AHRI certified). |
| DHW draw at 77°F rise | 3.4 GPM | Maximum DHW draw at a 77°F rise per the DHW ratings table. |
| DHW draw at 90°F rise | 2.9 GPM | Maximum DHW draw at a 90°F rise per the DHW ratings table. |
| Minimum DHW flow to initiate demand | 0.5 GPM | Minimum DHW flow rate through the boiler to initiate DHW demand per the ratings table notes. |
| Domestic hot water | Integrated combi boiler: space heating plus on-demand domestic hot water from the same appliance | A low-loss header is included with the combi models; DHW ratings are not AHRI certified per the ratings table. |
| Venting and air | ||
| Max. equivalent vent length, 2" | 70 ft | 2" standard venting, 2.5 ft minimum; derated at maximum length per the I&O manual. |
| Max. equivalent vent length, 3" | 135 ft | 3" venting with increaser, 2.5 ft minimum; derated at maximum length per the I&O manual. |
| Physical and connections | ||
| Shipping weight | 112 lb | Approximate shipping weight per the product ratings table. |
| Dimensions (D × W × H) | 16.3" × 17.8" × 29.8" | Depth × width × height per the product dimensions table and the I&O manual (Table 3-2). |
| CH water connections | 1-1/4" sweat | Heating supply/return 1-1/4" sweat per the I&O manual; the product page lists 1-1/4" MPT. |
| DHW connections | 3/4" sweat | Domestic hot water connections 3/4" sweat per the I&O manual; relief valve 3/4". |
| Gas connection | 1/2" MPT | Gas connection 1/2" MPT per the product page. |
| Operating limits and other | ||
| Control | Gas-adaptive 'PHTM II' control | Rate-based temperature reset, PAT gas-adaptive technology and H/E-code diagnostics per the I&O manual. |
| Fuel | Natural gas or LP | Ships as a natural gas boiler, field convertible to LP with no conversion kit required (product page). |
Manuals
Alerts documented for this model
Frequently asked questions
How much hot water does the PHTM2136C deliver?
Up to 3.7 GPM at a 70°F rise, 3.4 GPM at 77°F and 2.9 GPM at 90°F per the DHW ratings table; real delivery falls as incoming water cools.
What is the difference between PHTM2136C and the heat-only PHTM2120H?
The combi shares the heat-only model's 13.6–120 MBH space-heating input but adds a DHW side firing 13.6–136 MBH with a low-loss header included; the heat-only model makes no domestic hot water.
Is the DHW rating AHRI certified?
No — the ratings table notes that DHW ratings are not AHRI certified, and the Net AHRI figures apply to the water (space-heating) ratings.
Questions about the Crown Phantom II Combi PHTM2136C?
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
- Velocity Boiler Works — Phantom II Combi product page · accessed September 8, 2026
- Phantom II Combi Installation, Operating & Service Instructions, Doc 110331-10 (9/25) (PDF) · 110331-10 · accessed September 8, 2026
Facts checked September 8, 2026. Last updated September 8, 2026. Technical reviewer: not yet assigned.