Crown Aruba 4 AWR175E
The Crown Aruba 4 AWR175E fires a fixed 175 MBH for 146 MBH DOE heating capacity and a 127 MBH net AHRI rating at 83.5% AFUE across 6 cast-iron sections, with a 7" flue connector.
Key figures
- Max input
- 175 MBH
- Max CSA output
- —
- AFUE
- 83.5 %
- Min input
- —
Input is gas energy consumed; output is heat delivered. Never size from input alone.
Crown Aruba 4 AWR175E in practice
The AWR175E is the first of the large Aruba 4 sizes: a fixed 175 MBH input for 146 MBH DOE heating capacity and a 127 MBH net AHRI water rating at 83.5% AFUE, over 6 cast-iron sections (Table 2.2, manual P/N 9902339, May 2018). It is a NON-condensing, Category I natural-draft boiler with the draft hood built in, mandatory vent damper, and a 7" flue connector (C) into a lined masonry or listed metal chimney.
Supply/return tappings are 1-1/4" (side-relocatable) with the gas connection per the manifold and a required sediment trap; Honeywell S9361A interrupted ignition with EnviraCOM options listed. Dimension A is 21-1/2" with dimension B 31-3/4" per the ratings table. Above 2,000 ft different main burner orifices apply; NG/LP suffix codes (AWR175EN / AWR175EL) complete the model.
Aruba 4 is legacy (current line: Aruba 6, AWR038C–AWR280C) with productStatus 'discontinued'; canadianStatus stays 'unknown'. A licensed contractor performs installation, gas and venting work.
Best suited to
- Large homes with a chimney-vented fixed 175 MBH AWR load
- Owners researching the large end of the legacy Aruba 4 cast-iron line
- Projects matching a 7" flue connector into an existing chimney
Applicability and support
- Model number
- AWR175E
- Canadian availability
- unknown
- Production status
- discontinued
- 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 | ||
| Input | 175 MBH | Fixed input (no modulation) per the AWR space-heating ratings table (Table 2.2); NG/LP suffix added to the model (e.g. AWR210EN / AWR210EL). |
| Output | ||
| DOE heating capacity | 146 MBH | Heating capacity per the AWR ratings table (Table 2.2). |
| Net AHRI water rating | 127 MBH | Net AHRI water rating based on a piping and pickup allowance of 1.15 per the ratings table. |
| Efficiency | ||
| Efficiency (AFUE) | 83.5 % | AFUE per the AWR ratings table (Table 2.2). |
| Domestic hot water | ||
| Domestic hot water | Heating-only boiler — domestic hot water comes from a separate indirect tank or water heater | |
| Venting and air | ||
| Venting | Category I natural draft — draft hood built into the boiler; lined masonry or listed metal chimney | Vent damper installation is mandatory on all AWR boilers; flue connector size (C) 7" per the ratings table. Boilers above 2,000 ft need different main burner orifices. |
| Physical and connections | ||
| Cast-iron sections | 6 | Number of sections per the AWR ratings table. |
| Dimensions (A × B) | 21-1/2" × 31-3/4" | Dimension A and dimension B per the AWR ratings table (Table 2.2); flue connector (C) is 7". |
| Supply/return tappings | 1-1/4" | Supply and return tappings 1-1/4" (side-relocatable) per the installation manual. |
| Operating limits and other | ||
| Ignition and controls | Honeywell S9361A interrupted ignition with vent damper | EnviraCOM options listed in the installation manual; the control shows discrete Err codes. |
| Fuel | Natural gas or propane | Add suffix N for natural gas or L for propane to the basic boiler model (e.g. AWR210EN, AWR210EL). |
Manuals
Frequently asked questions
What are the AWR175E's ratings?
175 MBH fixed input, 146 MBH DOE heating capacity, a 127 MBH net AHRI water rating and 83.5% AFUE per the AWR ratings table.
How does the AWR175E differ from the AWR140E?
Input rises from 140 to 175 MBH, sections from 5 to 6, DOE capacity from 117 to 146 MBH and net AHRI from 102 to 127 MBH; the flue connector (C) grows from 6" to 7" and dimension B from 31-1/2" to 31-3/4".
Does the AWR175E have a vent damper?
Yes — vent damper installation is mandatory on all AWR boilers per the installation manual.
Questions about the Crown Aruba 4 AWR175E?
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.
Compare and explore
Sources and verification
- AWR Series Gas-Fired Natural Draft Hot Water Boilers — Installation Manual, P/N 9902339 (May 2018) (PDF) · 9902339 · accessed September 8, 2026
- Velocity Boiler Works — Aruba 6 (AWR) product page (current Aruba line) · accessed September 8, 2026
Facts checked September 8, 2026. Last updated September 8, 2026. Technical reviewer: not yet assigned.