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Comparison
Verdict in brief
Both the Utica PEG187FID and the Utica PEG225FID belong to the Utica Boilers PEG-F (Gas Steam) line of non-condensing boilers. Published ratings: Utica PEG187FID at 187/175 MBH input, 153/143 MBH heating capacity and 82% AFUE; Utica PEG225FID at 225/210 MBH input, 183/171 MBH heating capacity and 82% AFUE. The published input differs: Utica PEG187FID lists 187/175 MBH, while Utica PEG225FID lists 225/210 MBH. Both list the same published AFUE of 82%.
Published manufacturer figures. Input and output are kept separate; blanks mean the manufacturer did not publish that value.
| Specification | Utica PEG187FID | Utica PEG225FID |
|---|---|---|
| Input | 187/175 MBH | 225/210 MBH |
| Heating capacity | 153/143 MBH | 183/171 MBH |
| AFUE | 82 % | 82 % |
| Dimensions (W x H x D) | 21 × 36⅜ × 26½ | 24¼ × 36⅜ × 26½ |
| Venting | Atmospheric chimney vent — front-mounted integral draft hood with vent damper | Atmospheric chimney vent — front-mounted integral draft hood with vent damper |
| Steam controls | Electronic low water cut-off with ¾" probe, pressure limit control, steam pressure gauge and glass water level gauge; factory-tapped ½" NPT location for a secondary manual-reset LWCO | Electronic low water cut-off with ¾" probe, pressure limit control, steam pressure gauge and glass water level gauge; factory-tapped ½" NPT location for a secondary manual-reset LWCO |
| Net AHRI steam rating | 115/107 MBH | 137/128 MBH |
| Steam radiation | 479/446 sq ft | 570/533 sq ft |
| Cast-iron sections | 6 | 7 |
| Vent pipe size | 7" | 7" |
| Piping risers | (2) 2" | (2) 2" |
| Shipping weight | 512 lb | 584 lb |
| Connections | 2½" NPT return and supply with two supply and two return tappings on both sides; gas ¾" NPT; 120 V AC, <12 A | 2½" NPT return and supply with two supply and two return tappings on both sides; gas ¾" NPT; 120 V AC, <12 A |
| Burners | Titanium burners | Titanium burners |
| Heat exchanger | Cast iron with cast-iron push nipples | Cast iron with cast-iron push nipples |
| Warranty | 12-year non-prorated limited residential warranty plus 5-year parts | 12-year non-prorated limited residential warranty plus 5-year parts |
Published ratings: the Utica PEG187FID is rated 187/175 MBH input, 153/143 MBH heating capacity and 82% AFUE; the Utica PEG225FID is rated 225/210 MBH input, 183/171 MBH heating capacity and 82% AFUE. The published input differs: Utica PEG187FID lists 187/175 MBH, while Utica PEG225FID lists 225/210 MBH. Both list the same published AFUE of 82%.
The dimensions differs: the Utica PEG187FID lists 21 × 36⅜ × 26½, while the Utica PEG225FID lists 24¼ × 36⅜ × 26½. The cast-iron sections differs: the Utica PEG187FID lists 6, while the Utica PEG225FID lists 7. The shipping weight differs: the Utica PEG187FID lists 512 lb, while the Utica PEG225FID lists 584 lb.
Both records print the same AFUE (82%), venting (Atmospheric chimney vent — front-mounted integral draft hood with vent damper), control (Electronic low water cut-off with ¾" probe, pressure limit control, steam pressure gauge and glass water level gauge; factory-tapped ½" NPT location for a secondary manual-reset LWCO) and vent pipe size (7"), per the cited sources.
Utica Boilers
The Utica PEG187FID is a gas-fired cast-iron steam boiler: 187/175 MBH input (NG/LP), 153/143 MBH heating capacity, 115/107 MBH net steam and 479/446 sq ft at 82% AFUE, with 6 sections, a 7" vent and (2) 2" piping risers. It is tagged 'Current' on Utica's Gas Boilers category page.
Utica Boilers
The Utica PEG225FID is a gas-fired cast-iron steam boiler: 225/210 MBH input (NG/LP), 183/171 MBH heating capacity, 137/128 MBH net steam and 570/533 sq ft at 82% AFUE, with 7 sections, a 7" vent and (2) 2" piping risers. It is tagged 'Current' on Utica's Gas Boilers category page.
The Utica PEG187FID lists 187/175 MBH, while the Utica PEG225FID lists 225/210 MBH, per the cited documentation.
Both list the same AFUE of 82%.
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.