Laars Heating Systems · NeoTherm Commercial
Laars NeoTherm NTH 750
The Laars NeoTherm NTH 750 is a commercial condensing boiler rated 750,000 BTU/hr input and 724,000 BTU/hr output at 96.6% thermal efficiency, with a 1-1/2" NPT gas connection, 2" NPT water connection and a 481 lb shipping weight.
Key figures
- Max input
- 750,000 BTU/hr
- Max CSA output
- 724,000 BTU/hr
- AFUE
- —
- Min input
- —
Input is gas energy consumed; output is heat delivered. Never size from input alone.
Laars NeoTherm NTH 750 in practice
The NTH 750 is the 750,000 BTU/hr size of Laars' commercial NeoTherm boiler line, documented as NTH 399-850 in the touchscreen I&O manual (Document 1330M). The Document 1217 submittal sizing table lists 750,000 BTU/hr input, 724,000 BTU/hr output, 96.6% thermal efficiency and 96.6% combustion efficiency, with a 1-1/2" NPT gas connection, 2" NPT water connection and a 481 lb shipping weight.
The commercial NeoTherm remains listed on Laars' Commercial > Boilers category at 5:1 turndown with 96% boiler thermal efficiency; the product page prints propane-fueled boiler and volume water heater sizes 399-850 MBH plus a 285 MBH volume water heater on propane or natural gas, and directs natural-gas buyers looking for 399-1500 MBH to the NeoTherm XTR. The NTH shares the Laars Linc feature set with the XTR.
Best suited to
- Commercial hydronic loads near 750,000 BTU/hr input
- Buildings replacing an existing commercial NeoTherm
- Propane-fueled projects in the 399-850 MBH band
Applicability and support
- Model number
- NTH 750
- 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 | 750,000 BTU/hr | Per the Document 1217 NTH submittal sizing table. |
| Output | ||
| Output | 724,000 BTU/hr | Per the Document 1217 NTH submittal sizing table. |
| Efficiency | ||
| Efficiency (thermal) | 96.6 % | Per the Document 1217 NTH submittal sizing table. |
| Efficiency (combustion) | 96.6 % | Per the Document 1217 NTH submittal sizing table. |
| Physical and connections | ||
| Gas connection | 1-1/2" NPT | Per the Document 1217 NTH submittal sizing table. |
| Water connection | 2" NPT | Per the Document 1217 NTH submittal sizing table. |
| Shipping weight | 481 lb | Per the Document 1217 NTH submittal sizing table. |
| Operating limits and other | ||
| Turndown | 5:1 | Printed on the commercial NeoTherm product page. |
Manuals
Alerts documented for this model
None documented yet.
Frequently asked questions
What are the NeoTherm NTH 750 ratings?
The Document 1217 submittal lists 750,000 BTU/hr input, 724,000 BTU/hr output and 96.6% thermal efficiency.
Is the commercial NeoTherm available in Canada?
Laars' researched pages print no per-product Canada restriction for this line; confirm current availability and fuel configuration with Laars Canada or an authorized distributor. The XTR's I&O back cover lists Laars' Canadian office.
Which NeoTherm should a natural-gas project use?
Laars' NeoTherm page answers this directly: natural-gas units from 399 to 1500 MBH point to the NeoTherm XTR, while the plain commercial NeoTherm page prints the 399-850 propane-leaning configurations.
Questions about the Laars NeoTherm NTH 750?
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
- Laars — NeoTherm (commercial boiler and volume water heater) product page · accessed September 9, 2026
- NeoTherm NTH Hydronic Boiler Submittal, Document 1217 · 1217 · accessed September 9, 2026
Facts checked September 9, 2026. Last updated September 9, 2026. Technical reviewer: not yet assigned.