Rinnai IP090199C
The Rinnai IP090199C pairs a 90 MBH heating input with a 199 MBH DHW input: 15 to 90 MBH central heating plus near-tankless hot-water headroom in the small 73 lb chassis, rated up to 96% AFUE in Rinnai's Canadian marketing.
Key figures
- Max input
- 90 MBH
- Max CSA output
- —
- AFUE
- 96 %
- Min input
- 15 MBH
Input is gas energy consumed; output is heat delivered. Never size from input alone.
Rinnai IP090199C in practice
The IP090199C takes the 90 MBH heating input of the IP090099C and pairs it with the full 199 MBH DHW rating, so the boiler can satisfy a large hot-water load from a modest heating load. Rinnai's product page names it "CH 90k / DHW 199k".
Two product-page figures for this model conflict with the I&O manual and are flagged rather than repeated: the page prints 68 lb where the manual spec table prints 73.0 lb (33 kg), and 9.8 GPM maximum DHW flow where the manual prints 7.9 GPM (30 L/min). Boilers.ca uses the manual values; the discrepancies are documented in the research notes for this model.
Venting on this model is 3" twin-pipe to 160 equivalent feet per the manual (no 2" length is printed for it in the vent-length row group), and it keeps the small-chassis dimensions of 18.5 x 11.5 in with 1" NPT heating connections.
Best suited to
- Homes with a modest heating load but heavy or simultaneous hot-water draws
- Owners who want 199 MBH of DHW input without stepping up to the 120-class chassis
- Installations where a 3" vent run up to 160 equivalent ft fits
Applicability and support
- Model number
- IP090199C
- Canadian availability
- available
- Production status
- current
- ROMA supplies
- Confirmed at consultation
- ROMA services
- Confirmed at consultation
- Warranty
- Series terms
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 Rinnai. Units are shown with every value; notes flag conflicting sources or missing figures.
| Specification | Value | Note |
|---|---|---|
| Input | ||
| Heating input, minimum | 15 MBH | Space-heating input; 15,000 BTU/h minimum input per spec Table 2. |
| Heating input, maximum | 90 MBH | Space-heating (CH) maximum input per spec Table 2. |
| Efficiency | ||
| Efficiency (AFUE) | 96 % | Up to 96% AFUE per Rinnai Canada marketing copy and the Canadian brochure; no per-model AFUE figure is printed in the I&O manual spec tables. |
| Domestic hot water | ||
| DHW input, maximum | 199 MBH | 199,000 BTU/h maximum DHW input per spec Table 2. |
| Maximum DHW flow rate | 7.9 GPM | 7.9 GPM (30 L/min) per spec Table 2. The product page prints 9.8 GPM — a page/manual discrepancy; the manual figure is used here. |
| Domestic hot water | On demand inside the combi | DHW input and flow figures above; DHW temperature setting range 98°F-140°F (37°C-60°C) per spec Table 2. |
| Venting and air | ||
| Venting | 2" nominal PVC/polypropylene or 3" x 5" concentric | Vent connection per the I&O manual; direct-vent (concentric or twin-pipe) and room-air options are covered in the manual's venting section. |
| Max. equivalent vent length, 3" | 160 ft | Twin-pipe 3" PVC / 3" PP maximum equivalent length per the I&O manual (Table 20); 2" twin-pipe is not printed for this model in the manual's vent-length row group. |
| Physical and connections | ||
| Weight | 73 lb | 73.0 lb (33 kg) per the I&O manual spec Table 2; the product page prints 68 lb (30.8 kg) — a page/manual discrepancy; the manual figure is used here. |
| Water content (CH) | 0.75 gal | Central-heating water content per spec Table 2. |
| Gas connection | 3/4" NPT | Per spec Table 3. |
| Heating water connections | 1" NPT | CH supply and return per spec Table 3. |
| DHW connections | 3/4" NPT | DHW cold inlet and hot outlet per spec Table 3. |
| Width | 18.5 in (470 mm) | Per the I&O manual dimension figure and the product page. |
| Depth | 11.5 in (291 mm) | Per the I&O manual dimension figure; the product page lists 292.1 mm. |
| Operating limits and other | ||
| Fuel | Natural gas or propane | Gas supply pressure per spec Table 2: NG 3.5-10.5 in. W.C. (0.87-2.61 kPa); propane 8.0-13.5 in. W.C. (1.99-3.36 kPa). |
| CH water pressure | 13 – 45 psi | Minimum 13 PSI (90 kPa), maximum 45 PSI (310 kPa); recommended 17-26 PSI; 30 PSI pressure relief valve included with the system (spec Table 2). |
Manuals
Alerts documented for this model
Frequently asked questions
Why does Boilers.ca show 7.9 GPM when the Rinnai page says 9.8 GPM?
The two sources disagree for this model: the I&O manual spec table (doc 800000190(02)) prints 7.9 GPM (30 L/min) while the product page prints 9.8 GPM. Boilers.ca documents the manual value and flags the page as discrepant.
Is the IP090199C the same size as the IP090099C?
Yes. Both weigh 73.0 lb per the manual and share the small 18.5 x 11.5 in chassis; the difference is the DHW rating (199 MBH versus 99 MBH).
What is the heating output range?
Central-heating input runs 15,000 to 90,000 BTU/h per the I&O manual spec table. Domestic hot water fires separately up to 199,000 BTU/h.
Questions about the Rinnai IP090199C?
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
- Rinnai Canada — IP090199C product page · accessed September 7, 2026
- Rinnai Canada — condensing boilers · accessed September 7, 2026
Facts checked September 7, 2026. Last updated September 7, 2026. Technical reviewer: not yet assigned.