Ideal Heating · Exalt Floor (heat-only)
Ideal Exalt Floor 155
The Ideal Exalt Floor 155 is the mid-range floor-standing Exalt model: 19,375 to 155,000 BTU/h at 95% AFUE, 8:1 turndown and a 157 lb chassis with the Caleffi 548 separator and integrated circulator.
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 155 in practice
The Exalt Floor 155 fires from 19,375 to 155,000 BTU/h with the series' 8:1 turndown and 95% AFUE, giving a 142 MBH DOE heating capacity and a 123 MBH AHRI net rating. It is the floor-standing counterpart to the Exalt Wall 155 and shares the same control platform and venting options: 2-inch up to 33 equivalent feet or 3-inch up to 100 feet.
The chassis measures 22 x 41 x 22 inches and weighs 157 lb with 3 gallons of water volume, and ships with the Caleffi 548 series separator with air elimination and a pre-installed internal circulator. Water and gas connections can be routed on either side, and the integrated cascade function joins up to six boilers. Domestic hot water is handled separately, as this is a heat-only model.
The CTRLMax control provides plain-text diagnostics, outdoor reset and DHW priority, and the published installation and maintenance manual and submittal document the model. Natural-gas (IDEXFS155S) and propane (IDEXFS155SLP) versions are published with natural-gas input figures. 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 whose heat-loss calculation fits within 155 MBH and that prefer a floor-standing boiler
- Systems wanting the Caleffi separator and circulator factory-mounted
- Buildings planning a cascade of up to six Exalt Floor boilers
Applicability and support
- Model number
- IDEXFS155S (NG) / IDEXFS155SLP (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 | ||
| Domestic hot water | Heating-only; pair with a separate DHW source | |
| 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 | 157 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 | 1-1/4 in FPT when using the Caleffi 548 separator. |
| Water volume | 3 gal | Per the official model table. |
| Integrated cascade | Up to 6 boilers | 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
How does the Exalt Floor 155 differ from the Exalt Floor 110?
Both share the cabinet, separator, circulator and 8:1 turndown; the 155 adds input headroom to 155,000 BTU/h and rises to 157 lb with 3 gallons of water volume against the 110's 145 lb and 2 gallons.
Does the Exalt Floor 155 include a pump?
Yes — the official page lists a pre-installed internal circulator along with the Caleffi 548 series separator with air elimination.
Is the Exalt Floor 155 a combi boiler?
No. It is a heat-only floor-standing boiler; the Exalt Floor Combi 155 and 199 add on-demand domestic hot water in the same chassis.
Questions about the Ideal Exalt Floor 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 product page and model table · accessed September 9, 2026
- Ideal Heating NA — Exalt FSB 155 heat-only submittal (2023-47) · accessed September 9, 2026
Facts checked September 9, 2026. Last updated September 9, 2026. Technical reviewer: not yet assigned.