Canada-wide gas boiler information · On-site service in Greater Vancouver, BC
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Comparison
Verdict in brief
Lochinvar Knight KHB110 and Lochinvar Knight KHB155 are two condensing boilers from the Lochinvar Knight Floor Mount (KHB) line. Published ratings: Lochinvar Knight KHB110 at 11–110 MBH input, 102 MBH DOE heating capacity and 95% AFUE; Lochinvar Knight KHB155 at 15.5–155 MBH input, 144 MBH DOE heating capacity and 95% AFUE. Lochinvar Knight KHB155 lists 45 MBH more input than Lochinvar Knight KHB110 (155 MBH against 110 MBH). Both list the same published AFUE of 95%.
Published manufacturer figures. Input and output are kept separate; blanks mean the manufacturer did not publish that value.
| Specification | Lochinvar Knight KHB110 | Lochinvar Knight KHB155 |
|---|---|---|
| Heating input, minimum | 11 MBH | 15.5 MBH |
| Heating input, maximum | 110 MBH | 155 MBH |
| Efficiency (AFUE) | 95 % | 95 % |
| Domestic hot water | Heating-only boiler | Heating-only boiler |
| Water content | 2.3 gal | 3.2 gal |
| Venting | Category IV sealed combustion; PVC, CPVC, polypropylene or stainless steel | Category IV sealed combustion; PVC, CPVC, polypropylene or stainless steel |
| Max. equivalent vent/air length, 3" | 100 ft | 100 ft |
| Space-heating water connections | 1" | 1" |
| Gas connection | 1/2" | 1/2" |
| DOE heating capacity | 102 MBH | 144 MBH |
| AHRI net water rating | 89 MBH | 125 MBH |
Published ratings: the Lochinvar Knight KHB110 is rated 11–110 MBH input, 102 MBH DOE heating capacity and 95% AFUE; the Lochinvar Knight KHB155 is rated 15.5–155 MBH input, 144 MBH DOE heating capacity and 95% AFUE. Lochinvar Knight KHB155 lists 45 MBH more input than Lochinvar Knight KHB110 (155 MBH against 110 MBH). Both list the same published AFUE of 95%.
The boiler water content differs: the Lochinvar Knight KHB110 lists 2.3 gal, while the Lochinvar Knight KHB155 lists 3.2 gal.
Both records print the same AFUE (95%), domestic-hot-water arrangement (Heating-only boiler), venting (Category IV sealed combustion; PVC, CPVC, polypropylene or stainless steel) and max. equivalent vent/air length, 3" (100 ft), per the cited sources.
Lochinvar
The Knight KHB110 is the 110 MBH floor-standing Knight: 11 to 110 MBH input at 95% AFUE with 102 MBH DOE capacity, matching the wall-hung WHB110 on a floor frame.
Lochinvar
The Knight KHB155 is the 155 MBH floor-standing Knight: 15.5 to 155 MBH input at 95% AFUE with 144 MBH DOE capacity, vented in 3" pipe to 100 equivalent feet.
The Lochinvar Knight KHB155 lists 155 MBH, against 110 MBH on the Lochinvar Knight KHB110, per the cited documentation.
Both list the same AFUE of 95%.
A consultation includes a heat-loss review so the size is right the first time.
On-site service in Greater Vancouver, BC. ROMA lists “Open 7 days” on its site; call to confirm same-day availability.
Sources and verification
Facts checked September 9, 2026. Last updated September 9, 2026. Technical reviewer: not yet assigned.