Ideal Heating · Exalt Floor Combi
Ideal Exalt Floor Combi 155
The Ideal Exalt Floor Combi 155 is a floor-standing combi: 19,375 to 155,000 BTU/h heating input at 95% AFUE with 4.0 GPM on-demand DHW at a 70°F rise, an included separator and circulator, in a 181 lb chassis.
Key figures
- Max input
- 155 MBH
- Max CSA output
- —
- AFUE
- 95 %
- Min input
- 19.375 MBH
Input is gas energy consumed; output is heat delivered. Never size from input alone.
Ideal Exalt Floor Combi 155 in practice
The Exalt Floor Combi 155 combines the floor-standing Exalt chassis with on-demand domestic hot water. Heating input runs 19,375 to 155,000 BTU/h at 95% AFUE with an 8:1 turndown, a 142 MBH DOE heating capacity and a 123 MBH AHRI net rating. The DHW side delivers 4.0 GPM at a 70°F rise, 3.7 GPM at 75°F and 3.5 GPM at 80°F, with a 0.5 GPM minimum flow and a 150 psi maximum DHW pressure.
The unit measures 22 x 41 x 22 inches and weighs 181 lb with 3 gallons of water volume. It ships with the Caleffi 548 series separator with air elimination and a pre-installed internal circulator — the features that distinguish the floor platform from the wall models — and vents with 2-inch pipe up to 33 equivalent feet or 3-inch up to 100 feet. The DHW temperature ceiling is 150°F (65°C) against a 185°F (85°C) central-heating maximum.
CTRLMax provides DHW priority, outdoor reset and plain-text diagnostics. The combi replaces a boiler-and-tank pair where the mechanical room has floor space; homes whose hot-water demand exceeds 4.0 GPM at a 70°F rise step to the combi 199. Natural-gas (IDEXFS155C) and propane (IDEXFS155CLP) versions are published. No explicit Canadian sales statement was found on the official pages checked on 2026-09-09; the Exalt and Gallant submittals list ANSI Z21.13 and CSA 4.9 compliance, so Boilers.ca records canadianStatus as unknown.
Best suited to
- Homes wanting a floor-standing combi with factory-mounted separation and circulation
- Households whose DHW demand stays within 4.0 GPM at a 70°F rise
- Retrofits replacing both a floor-standing boiler and a DHW tank
Applicability and support
- Model number
- IDEXFS155C (NG) / IDEXFS155CLP (LP)
- Canadian availability
- unknown
- 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 Ideal Heating. Units are shown with every value; notes flag conflicting sources or missing figures.
| Specification | Value | Note |
|---|---|---|
| Input | ||
| Input, minimum (NG & LP) | 19.375 MBH | 19,375 BTU/h per the official model table |
| Input, maximum (NG & LP) | 155 MBH | 155,000 BTU/h per the official model table |
| Output | ||
| DOE heating capacity | 142 MBH | Per the official model table. |
| AHRI net rating | 123 MBH | Per the official model table. |
| Efficiency | ||
| Efficiency (AFUE) | 95 % | 95% AFUE per the official model table. |
| Domestic hot water | ||
| DHW output at 70°F rise | 4 GPM | Per the official model table. |
| DHW output at 75°F rise | 3.7 GPM | Per the official model table. |
| DHW output at 80°F rise | 3.5 GPM | Per the official model table. |
| DHW minimum flow rate | 0.5 GPM | Per the official model table. |
| DHW maximum operating pressure | 150 psi | Per the official model table. |
| Maximum DHW flow temperature | 150 °F | 150°F (65°C) per the official model table. |
| Domestic hot water | Combi: on-demand DHW via an integrated plate heat exchanger | |
| Venting and air | ||
| Vent / air connections | 3 in | |
| Maximum vent length, 3 in | 100 ft | Per the official model table. |
| Maximum vent length, 2 in | 33 ft | Per the official model table. |
| Physical and connections | ||
| Weight | 181 lb | |
| Width | 22 in | |
| Height | 41 in | |
| Depth | 22 in | |
| Operating limits and other | ||
| Turndown ratio | 8:1 | Per the official model table. |
| Gas connection (MNPT) | 3/4 in | |
| Supply / return connections (MNPT) | 1 in | |
| Water volume | 3 gal | Per the official model table. |
| Maximum CH flow temperature | 185 °F | 185°F (85°C) per the official model table. |
Manuals
Alerts documented for this model
Frequently asked questions
What DHW output does the Exalt Floor Combi 155 provide?
4.0 GPM at a 70°F rise, 3.7 GPM at 75°F and 3.5 GPM at 80°F, with a 0.5 GPM minimum flow rate and a 150 psi maximum DHW operating pressure.
What is the heating capacity of the Exalt Floor Combi 155?
19,375 to 155,000 BTU/h input at 95% AFUE with an 8:1 turndown, a 142 MBH DOE heating capacity and a 123 MBH AHRI net rating.
Does the Exalt Floor Combi 155 include a separator and pump?
Yes — the official model page lists a Caleffi 548 series separator with air elimination and a pre-installed internal circulator on the floor combi chassis.
Questions about the Ideal Exalt Floor Combi 155?
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
- Ideal Heating NA — Exalt Floor Combi product page and model table · accessed September 9, 2026
- Ideal Heating NA — Exalt FSB 155 combi submittal (2023-49) · accessed September 9, 2026
Facts checked September 9, 2026. Last updated September 9, 2026. Technical reviewer: not yet assigned.