Laars Heating Systems · MagnaTherm HTD
Laars MagnaTherm HTD 2500
The Laars MagnaTherm HTD 2500 is a high-turndown commercial condensing boiler and volume water heater rated 125-2,499 MBH input and 119-2,374 MBH output at 95% boiler thermal efficiency with full 20:1 modulation.
Key figures
- Max input
- 2,499 MBH
- Max CSA output
- 2,374 MBH
- AFUE
- —
- Min input
- 125 MBH
Input is gas energy consumed; output is heat delivered. Never size from input alone.
Laars MagnaTherm HTD 2500 in practice
The MagnaTherm HTD 2500 is the 2,499 MBH size of Laars' high-turndown MGH platform, documented in the Document 1425 submittal and the Document 1422 I&O. The submittal sizing table lists 125-2,499 MBH input, 119-2,374 MBH output, 95% boiler thermal efficiency and 93.8% combustion efficiency, with 31 gallons of water content and a 2010 lb shipping weight.
The HTD puts full 20:1 modulation on every size — minimum inputs of 80-200 MBH against 1,600-4,000 MBH maximums — and adds Laars Tru Trac O2 trim, which adjusts the fuel-to-air ratio in real time across the turndown range. Like the base MagnaTherm it is a gasketless stainless-steel micro-fin water-tube design with the Laars Linc touchscreen control, Vari-Prime pump control, low NOx and electrical packages for 120, 240, 480 or 600 VAC.
Best suited to
- Large commercial loads with wide seasonal swings that benefit from 20:1 modulation
- Plants that want Tru Trac O2 trim and the Laars Linc control
- Indoor or outdoor installations with the MGH footprint
Applicability and support
- Model number
- MGH 2500
- Canadian availability
- available
- Production status
- current
- 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 Laars Heating Systems. Units are shown with every value; notes flag conflicting sources or missing figures.
| Specification | Value | Note |
|---|---|---|
| Input | ||
| Input, minimum | 125 MBH | Per the Document 1425 MagnaTherm HTD submittal sizing table. |
| Input, maximum | 2,499 MBH | Per the Document 1425 MagnaTherm HTD submittal sizing table. |
| Output | ||
| Output, minimum | 119 MBH | Per the Document 1425 MagnaTherm HTD submittal sizing table. |
| Output, maximum | 2,374 MBH | Per the Document 1425 MagnaTherm HTD submittal sizing table. |
| Efficiency | ||
| Efficiency (thermal) | 95 % | Boiler thermal efficiency column per the Document 1425 submittal; the volume water heater column prints 96%. |
| Efficiency (combustion) | 93.8 % | Combustion efficiency per the Document 1425 submittal. |
| Physical and connections | ||
| Shipping weight | 2,010 lb | Product weight 1810 lb, operating weight 2064 lb per the submittal. |
| Water content | 31 gal | Per the Document 1425 MagnaTherm HTD submittal. |
| Operating limits and other | ||
| Turndown | 20:1 | Full 20:1 modulation on every size per the HTD product page and submittal. |
Manuals
Alerts documented for this model
None documented yet.
Frequently asked questions
What are the MagnaTherm HTD 2500 ratings?
The Document 1425 submittal lists 125-2,499 MBH input, 119-2,374 MBH output and 95% boiler thermal efficiency with a 20:1 turndown.
What does Tru Trac O2 trim do?
It adjusts the electric fuel-to-air ratio in real time to hold combustion efficiency across the entire 20:1 turndown range, per the MagnaTherm HTD product page.
Is the HTD the same platform as the MagnaTherm?
Yes — both use the MGH 1600-4000 water-tube platform and Laars Linc/Vari-Prime controls; the HTD is distinguished by full 20:1 modulation and Tru Trac O2 trim.
Questions about the Laars MagnaTherm HTD 2500?
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
- Laars MagnaTherm HTD 2000 vs HTD 2500Comparison
- Laars MagnaTherm HTD 2500 vs HTD 3000Comparison
- Laars MagnaTherm HTD 1600Same series
- Laars MagnaTherm HTD 2000Same series
- Laars MagnaTherm HTD 3000Same series
- Laars MagnaTherm HTD 3500Same series
- Laars MagnaTherm HTD 4000Same series
- MagnaTherm HTD series hub
- Buying guide
Sources and verification
- Laars — MagnaTherm HTD product page · accessed September 9, 2026
- MagnaTherm HTD Boiler Submittal, Document 1425 · 1425 · accessed September 9, 2026
Facts checked September 9, 2026. Last updated September 9, 2026. Technical reviewer: not yet assigned.