Canada-wide gas boiler information · On-site service in Greater Vancouver, BC
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Comparison
Verdict in brief
The EFTU-199WCN is the top Elite Fire Tube Ultra combi: it fires 19,900–199,000 BTU/hr for both CH and DHW and delivers 10.5 GPM at a 35 °F rise against the EFTU-150WCN's 7.9 GPM, with DOE heating capacity up from 138 to 184 MBH. In exchange it must vent in 3" pipe only, deepens to the 18.5 in cabinet and ships at 132 lb.
Published manufacturer figures. Input and output are kept separate; blanks mean the manufacturer did not publish that value.
| Specification | HTP EFTU-150WCN | HTP EFTU-199WCN |
|---|---|---|
| Central-heating input, minimum (natural gas) | 15 MBH | 19.9 MBH |
| Central-heating input, maximum (natural gas) | 150 MBH | 199 MBH |
| DHW input, minimum | 15 MBH | 19.9 MBH |
| DHW input, maximum | 150 MBH | 199 MBH |
| DOE AFUE | 95 % | 95 % |
| Heating capacity (DOE) | 138 MBH | 184 MBH |
| DHW flow rate at 35 °F rise | 7.9 gpm | 10.5 gpm |
| DHW flow rate at 45 °F rise | 6.1 gpm | 8.2 gpm |
| DHW flow rate at 77 °F rise | 3.6 gpm | 4.8 gpm |
| Shipping weight | 121 lb | 132 lb |
| Approximate full boiler weight | 128.5 lb | 140.5 lb |
| Venting | Exhaust 2" (6–100 ft) or 3" (6–150 ft); intake 2" (0–100 ft) or 3" (0–150 ft) | Exhaust and intake 3" only — exhaust 6–150 ft, intake 0–150 ft |
The EFTU-150WCN and EFTU-199WCN share the Elite Fire Tube Ultra combi platform — vertical fire-tube heat exchanger, 10:1 turndown, ECM pump, 95% DOE AFUE — but split on packaging: the 150 stays in the 17 in deep cabinet at 121 lb shipping (128.5 lb full, 2.1 gal water content), while the 199 deepens to 18.5 in, ships at 132 lb (140.5 lb full, 2.8 gal water content) and must be vented in 3" diameter pipe per LP-723.
The hot-water table is the headline: the 199 combi prints 10.5 / 8.2 / 4.8 GPM at 35 / 45 / 77 °F rises against the 150's 7.9 / 6.1 / 3.6 GPM, with DHW input matching the CH range on each model. DOE heating capacity steps from 138 to 184 MBH and the net AHRI rating from 120 to 160 MBH.
Both combis use 1-1/4" male NPT CH supply/return with 3/4" NPT DHW inlet/outlet and gas, a 50 psi heat-exchanger MAWP with 30 psi relief, and the 15-year registered warranty. A project that cannot vent the 199 in 3" pipe must stay at the 150 or smaller.
The HTP EFTU-150WCN is the 150 MBH class wall-hung combi of the Elite Fire Tube Ultra line: 15.0 to 150 MBH input for central heating and the same range for domestic hot water, 95% DOE AFUE, 138 MBH DOE heating capacity and up to 3.6 GPM of DHW at a 77 °F rise.
The HTP EFTU-199WCN is the 199 MBH class wall-hung combi of the Elite Fire Tube Ultra line: 19.9 to 199 MBH input for central heating and the same range for domestic hot water, 95% DOE AFUE, 184 MBH DOE heating capacity and up to 4.8 GPM of DHW at a 77 °F rise.
Yes — LP-723 requires 199/199C models to be vented in 3" diameter pipe (exhaust 6–150 ft, intake 0–150 ft).
10.5 GPM at a 35 °F rise, 8.2 GPM at 45 °F and 4.8 GPM at a 77 °F rise per the official table.
Yes — the 199 uses the deeper 18.5 in cabinet, ships at 132 lb (against 121 lb) and holds 2.8 gal of water against 2.1 gal.
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 8, 2026. Last updated September 8, 2026. Technical reviewer: not yet assigned.