Canada-wide gas boiler information · On-site service in Greater Vancouver, BC
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Comparison
Verdict in brief
The Exalt Wall 110 and 155 are both 95% AFUE heat-only condensing boilers in the same 21.75 x 26 x 16.5 inch cabinet with an 8:1 turndown and identical venting options. The 155 adds 45,000 BTU/h of input ceiling (155,000 vs 110,000 BTU/h) but raises the minimum fire from 13,750 to 19,375 BTU/h and the weight from 88 to 99 lb, so a heat-loss calculation decides between them.
Published manufacturer figures. Input and output are kept separate; blanks mean the manufacturer did not publish that value.
| Specification | Ideal Exalt Wall 110 | Ideal Exalt Wall 155 |
|---|---|---|
| Input, minimum (NG & LP) | 13.75 MBH | 19.375 MBH |
| Input, maximum (NG & LP) | 110 MBH | 155 MBH |
| Efficiency (AFUE) | 95 % | 95 % |
| Turndown ratio | 8:1 | 8:1 |
| DOE heating capacity | 102 MBH | 142 MBH |
| AHRI net rating | 89 MBH | 123 MBH |
| Weight | 88 lb | 99 lb |
| Water volume | 2 gal | 3 gal |
| Domestic hot water | Heating-only; pair with a separate DHW source | Heating-only; pair with a separate DHW source |
Both models are heating-only boilers on the same Exalt Wall platform: 95% AFUE, an 8:1 turndown, a stainless steel fire-tube heat exchanger and the CTRLMax control. The published difference is the firing range — 13,750 to 110,000 BTU/h on the 110 and 19,375 to 155,000 BTU/h on the 155 — which lifts the DOE heating capacity from 102 to 142 MBH and the AHRI net rating from 89 to 123 MBH.
The minimum fire is the practical difference in mild weather: the 110 fires down to 13,750 BTU/h and the 155 only to 19,375 BTU/h. In a tight, well-insulated home the 110 can track low shoulder-season loads more closely, while the 155 covers larger design-day loads and faster indirect-tank recovery.
The cabinet is unchanged — 21.75 x 26 x 16.5 inches — with weight rising from 88 to 99 lb and water volume from 2 to 3 gallons. Both list 2-inch venting up to 28 feet or 3-inch up to 100 feet, the same 3/4-inch gas and 1-inch water connections, and the same integrated six-boiler cascade capability. Neither produces domestic hot water, so both pair with a separate DHW source.
Ideal Heating
The Ideal Exalt Wall 110 is the smallest heat-only model in the Exalt Wall line: 13,750 to 110,000 BTU/h input at 95% AFUE, 8:1 turndown and an 88 lb wall-hung cabinet, with 2-inch venting up to 28 feet or 3-inch up to 100 feet.
Ideal Heating
The Ideal Exalt Wall 155 is the mid-range heat-only model in the Exalt Wall line: 19,375 to 155,000 BTU/h input at 95% AFUE, 8:1 turndown, with a 99 lb cabinet and the same venting options as the 110.
Yes — both share the 21.75 x 26 x 16.5 inch cabinet. The 155 weighs 99 lb against 88 lb and holds 3 gallons against 2, per the official model table.
The 110, at 13,750 BTU/h minimum against the 155's 19,375 BTU/h. In a low-load home that lower floor means less cycling in mild weather.
Yes: 2-inch venting up to 28 equivalent feet and 3-inch up to 100 feet through the 3-in-1 universal vent adapter.
A consultation includes a heat-loss review so the size is right the first time.
On-site service in Greater Vancouver, BC. ROMA lists “Open 7 days” on its site; call to confirm same-day availability.
Sources and verification
Facts checked September 9, 2026. Last updated September 9, 2026. Technical reviewer: not yet assigned.