Canada-wide gas boiler information · On-site service in Greater Vancouver, BC
Boilers.ca is a brand of ROMA Heating & Cooling · Licensed gas contractor LGA0202903
Comparison
Verdict in brief
The EP-150 grows the Elite Premier package: it shares the 96%-vs-95% step down in printed AFUE, but adds 40 MBH of input ceiling (138 vs 100 MBH heating capacity), 2.0 vs 1.7 gal of water content and a deeper 19.5 in cabinet while keeping the same 14.5 in width and 27 in height.
Published manufacturer figures. Input and output are kept separate; blanks mean the manufacturer did not publish that value.
| Specification | HTP EP-110 | HTP EP-150 |
|---|---|---|
| Input rate, minimum | 11 MBH | 15 MBH |
| Input rate, maximum | 110 MBH | 150 MBH |
| AFUE (as printed) | 96 % | 95 % |
| Heating capacity | 100 MBH | 138 MBH |
| Shipping weight | 113 lb | 126 lb |
| Boiler water content | 1.7 gal | 2 gal |
| Dimensions (W x H x D) | 14.5" x 27" x 18.5" | 14.5" x 27" x 19.5" |
| CH supply/return connection | 1" NPTF | 1" NPTF |
| Gas supply connection | 3/4" NPTF | 3/4" NPTF |
| Venting | 3" (200 ft) or 4" (275 ft), combined equivalent feet | 3" (200 ft) or 4" (275 ft), combined equivalent feet |
Input runs 11,000-110,000 BTU/hr on the EP-110 at 96% AFUE and 15,000-150,000 on the EP-150 at 95% AFUE per the retired page table; LP-550 Table 4 prints 100 vs 138 MBH heating capacity.
The EP-150 deepens the cabinet from 18.5 to 19.5 in and adds 13 lb (126 vs 113 lb) with 2.0 gal of water content; both keep 1" NPTF CH and 3/4" NPTF gas connections and the same 3"/4" venting allowance.
Both fire down low enough for shoulder-season modulation, so the choice is the heat-loss calculation against the EP-150's larger capacity and slightly lower printed AFUE.
HTP
The HTP EP-110 is the 110 MBH class model of the retired Elite Premier low-mass condensing boiler line: 11,000 to 110,000 BTU/hr input, 96% printed AFUE, 100 MBH heating capacity and a 113 lb shipping weight, recorded from the official retired Elite Premier table.
HTP
The HTP EP-150 is the 150 MBH class model of the retired Elite Premier low-mass condensing boiler line: 15,000 to 150,000 BTU/hr input, 95% printed AFUE, 138 MBH heating capacity and a 126 lb shipping weight, recorded from the official retired Elite Premier table.
The EP-110 prints 96% AFUE against 95% for the EP-150 on the retired official table.
It shares the 14.5 x 27 in footprint but deepens to 19.5 in and weighs 126 lb against 113 lb.
100 MBH for the EP-110 and 138 MBH for the EP-150 in LP-550 Table 4.
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.