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Ideal Heating · Series
The Exalt Wall Combi is Ideal Heating North America's wall-hung residential combi line: the 155 and 199 MBH models, 95% AFUE, 8:1 turndown, with on-demand domestic hot water at up to 5.3 GPM at a 70°F rise.
Series facts
95% AFUE on both combi models per the official model table.
The Exalt Wall Combi brings the Exalt Wall platform to homes that want one appliance for space heating and domestic hot water. Two models are published — combi 155 and combi 199 — both rated 95% AFUE with an 8:1 turndown and a stainless steel fire-tube heat exchanger, in natural-gas and propane versions (IDEX155C / IDEX155CLP and IDEX199C / IDEX199CLP). Heating input runs 19,375 to 155,000 BTU on the 155 and 24,875 to 199,000 BTU on the 199.
The domestic hot water side is documented in the model table: 4.0 GPM at a 70°F rise on the 155 and 5.3 GPM on the 199, with 3.7 and 4.9 GPM at a 75°F rise and 3.5 and 4.6 GPM at 80°F. Minimum DHW flow is 0.5 GPM, maximum DHW operating pressure is 150 psi, and the DHW outlet temperature can reach 150°F (65°C) against a 185°F (85°C) central-heating maximum. The combi cabinet is taller than the heat-only models — 21.75 x 33 x 16.5 inches, weighing 110 lb on the 155 and 128 lb on the 199.
Like the heat-only models the combis use the CTRLMax control with plain-text diagnostics, outdoor reset and DHW priority, and share the 3-in-1 universal vent adapter. The 155 combi lists 2-inch venting up to 33 feet, and both models allow 100 feet of 3-inch venting. The series is aimed at townhouses and compact detached homes where the combined heating and hot-water load fits within 199 MBH.
Highlights
Ideal Advantage warranty program, as published on the Exalt product pages: Standard — 2-year parts and 10-year primary heat exchanger; Plus — 5-year parts, 2-year labour allowance and 10-year primary heat exchanger with registration; Elite — 6-year parts, 3-year labour and 12-year heat exchanger with registration, combustion analysis and hydronic system treatment.
Models
One canonical page per model with input, output and efficiency kept separate.
Ideal Heating
The Ideal Exalt Wall Combi 155 is a wall-hung combi boiler: 19,375 to 155,000 BTU/h heating input at 95% AFUE with on-demand DHW at 4.0 GPM at a 70°F rise, in a 110 lb cabinet with 2-inch venting up to 33 feet.
Ideal Heating
The Ideal Exalt Wall Combi 199 is the larger wall-hung combi: 24,875 to 199,000 BTU/h heating input at 95% AFUE with on-demand DHW at 5.3 GPM at a 70°F rise and 3-inch venting up to 100 feet.
| Specification | Ideal Exalt Wall Combi 155 | Ideal Exalt Wall Combi 199 |
|---|---|---|
| Input, minimum (NG & LP) | 19.375 MBH | 24.875 MBH |
| Input, maximum (NG & LP) | 155 MBH | 199 MBH |
| output-max | — | — |
| Efficiency (AFUE) | 95 % | 95 % |
| Turndown ratio | 8:1 | 8:1 |
| Maximum vent length, 3 in | 100 ft | 100 ft |
| Maximum vent length, 2 in | 33 ft | — |
| Weight | 110 lb | 128 lb |
Read the full comparison: Ideal Exalt Wall Combi 155 vs 199 →
Error codes and alerts
Manuals
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.
Services for Ideal Heating boilers
The published figures are 4.0 GPM at a 70°F rise for the combi 155 and 5.3 GPM for the combi 199, dropping to 3.7 and 4.9 GPM at a 75°F rise and 3.5 and 4.6 GPM at 80°F. Minimum DHW flow is 0.5 GPM.
The model table lists a maximum DHW flow temperature of 150°F (65°C), against a 185°F (85°C) maximum for central heating, with a maximum DHW operating pressure of 150 psi.
Yes. Each combi ships in a natural-gas or propane version — IDEX155C / IDEX155CLP and IDEX199C / IDEX199CLP — and the installation manual includes natural-gas-to-propane and propane-to-natural-gas conversion instructions.
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
Facts checked September 9, 2026. Last updated September 9, 2026. Technical reviewer: not yet assigned.