Crown Aruba 4 AWR070E
The Crown Aruba 4 AWR070E fires a fixed 70 MBH for 58 MBH DOE heating capacity and a 50 MBH net AHRI rating at 83.5% AFUE across 3 cast-iron sections — the second size of the legacy Category I AWR line.
Key figures
- Max input
- 70 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 AWR070E in practice
The AWR070E is the second Aruba 4 size: a fixed 70 MBH input for 58 MBH DOE heating capacity and a 50 MBH net AHRI water rating at 83.5% AFUE, over 3 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, a mandatory vent damper, and a 4" flue connector (C) into a lined masonry or listed metal chimney.
Supply/return tappings are 1-1/4" (side-relocatable) with gas connection per the manifold and a required sediment trap; ignition is Honeywell S9361A interrupted ignition with EnviraCOM options listed. Dimension A is 12-7/8" with dimension B 31-1/2" per the ratings table. Above 2,000 ft different main burner orifices apply, and NG/LP suffix codes (AWR070EN / AWR070EL) complete the model number.
The Aruba 4 is legacy (current line: Aruba 6, AWR038C–AWR280C) with productStatus 'discontinued'; canadianStatus stays 'unknown'. A licensed contractor handles installation, gas and venting work.
Best suited to
- Homes whose chimney-vented load fits a fixed 70 MBH AWR installation
- Owners comparing Aruba 4 ratings with the current Aruba 6 line
- Small cast-iron natural-draft replacement research in the 70 MBH class
Applicability and support
- Model number
- AWR070E
- 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 | 70 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 | 58 MBH | Heating capacity per the AWR ratings table (Table 2.2). |
| Net AHRI water rating | 50 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) 4" per the ratings table. Boilers above 2,000 ft need different main burner orifices. |
| Physical and connections | ||
| Cast-iron sections | 3 | Number of sections per the AWR ratings table. |
| Dimensions (A × B) | 12-7/8" × 31-1/2" | Dimension A and dimension B per the AWR ratings table (Table 2.2); flue connector (C) is 4". |
| 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 AWR070E's ratings?
70 MBH fixed input, 58 MBH DOE heating capacity, a 50 MBH net AHRI water rating and 83.5% AFUE per the AWR ratings table.
How does the AWR070E compare with the AWR038E?
Input rises from 38 to 70 MBH, sections from 2 to 3, DOE capacity from 32 to 58 MBH and net AHRI from 28 to 50 MBH; both keep a 4" flue connector and 83%-class AFUE.
What venting does the AWR070E need?
Category I natural draft into a lined masonry or listed metal chimney with the mandatory vent damper; the built-in draft hood connects at 4" on this size.
Questions about the Crown Aruba 4 AWR070E?
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
- Crown Aruba 4 AWR070E vs AWR105EComparison
- Crown Aruba 4 AWR038E vs AWR070EComparison
- Crown Aruba 4 AWR038ESame series
- Crown Aruba 4 AWR105ESame series
- Crown Aruba 4 AWR140ESame series
- Crown Aruba 4 AWR175ESame series
- Crown Aruba 4 AWR210ESame series
- Crown Aruba 4 AWR245ESame series
- Crown Aruba 4 AWR280ESame series
- Aruba 4 series hub
- Buying guide
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.