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Laars Heating Systems · MagnaTherm

Laars MagnaTherm MGH 2500

The Laars MagnaTherm MGH 2500 is a commercial condensing water-tube boiler and volume water heater rated 500-2,499 MBH input and 475-2,374 MBH output at 95% boiler thermal efficiency, with 31 gallons of water content and a 1985 lb shipping weight.

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Key figures

Max input
2,499 MBH
Max CSA output
2,374 MBH
AFUE
—
Min input
500 MBH
Natural gasHeating-onlycommercial

Input is gas energy consumed; output is heat delivered. Never size from input alone.

Laars MagnaTherm MGH 2500 in practice

The MGH 2500 is the 2,499 MBH size of Laars' MagnaTherm condensing stainless-steel water-tube platform, documented in the Document 1429 submittal and the Document 1398 I&O. The submittal sizing table lists 500-2,499 MBH input, 475-2,374 MBH output, 95% boiler thermal efficiency and 93.8% combustion efficiency, with 31 gallons of water content and a 1985 lb shipping weight.

Every MagnaTherm carries the Laars Linc touchscreen control with auto cascade, intelligent redundancy and quick-start setup, plus Laars Vari-Prime pump control that varies boiler pump speed to hold a fixed, user-selectable temperature rise. The boiler modulates down to 20% of full fire for a 5:1 turndown, is certified for indoor and outdoor placement with natural gas and low NOx, and carries an ASME 'H' stamp at 160 psi; electrical packages cover 120, 240, 480 or 600 VAC.

Best suited to

  • Large commercial hydronic loads near 2,499 MBH input
  • Plants that want the Laars Linc cascade and Vari-Prime pump control
  • Indoor or outdoor installations that need a small-footprint water-tube boiler

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.

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Specifications

Published specifications

Values as published by Laars Heating Systems. Units are shown with every value; notes flag conflicting sources or missing figures.

Laars MagnaTherm MGH 2500 specifications
SpecificationValueNote
Input
Input, minimum500 MBHPer the Document 1429 MagnaTherm submittal sizing table.
Input, maximum2,499 MBHPer the Document 1429 MagnaTherm submittal sizing table.
Output
Output, minimum475 MBHPer the Document 1429 MagnaTherm submittal sizing table.
Output, maximum2,374 MBHPer the Document 1429 MagnaTherm submittal sizing table.
Efficiency
Efficiency (thermal)95 %Boiler thermal efficiency column per the Document 1429 submittal; the volume water heater column prints 96%.
Efficiency (combustion)93.8 %Combustion efficiency per the Document 1429 submittal.
Physical and connections
Shipping weight1,985 lbProduct weight 1785 lb, operating weight 2039 lb per the submittal.
Water content31 galPer the Document 1429 MagnaTherm submittal.
Operating limits and other
Turndown5:1The base MagnaTherm modulates down to 20% of full fire per the product page and submittal.

Manuals

Alerts documented for this model

None documented yet.

Services

Related parts & service

Frequently asked questions

What are the MagnaTherm MGH 2500 ratings?

The Document 1429 submittal lists 500-2,499 MBH input, 475-2,374 MBH output and 95% boiler thermal efficiency.

What is the difference between the MagnaTherm and the MagnaTherm HTD?

Both are the same MGH 1600-4000 water-tube platform with Laars Linc and Vari-Prime, but the base MagnaTherm modulates down to 20% of full fire (5:1) while the HTD holds full 20:1 modulation on every size.

Does the MagnaTherm make domestic hot water?

The platform is offered as a boiler and a volume water heater; the Document 1429 submittal prints both boiler and VWH ratings columns, with 96% thermal efficiency in the VWH column.

Questions about the Laars MagnaTherm MGH 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.

Call 778-909-5731Request service

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Sources and verification

Facts checked September 9, 2026. Last updated September 9, 2026. Technical reviewer: not yet assigned.

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