Canada-wide gas boiler information · On-site service in Greater Vancouver, BC
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HTP · Series
The HTP EFW Series is the current wall-mount, condensing, stainless-steel fire-tube boiler line in HTP's space-heating navigation: three models — EFW-285WBN, EFW-340WBN and EFW-399WBN — spanning 285,000 to 399,000 BTU/hr with up to a 10:1 turndown, 95% AFUE / 95.4% thermal efficiency, a Honeywell Sola control and vent runs to 150 ft on the 285.
Series facts
The in-page rating table prints 95% AFUE for the EFW-285WBN and 95.4% thermal efficiency for the EFW-340WBN and EFW-399WBN (no AFUE rows for those two sizes); the page copy states the fire-tube heat exchanger 'can deliver up to 95% AFUE and 95.4 thermal efficiency'.
The EFW Series is documented on the official page as one of HTP's current space-heating families (navigation: 'Residential • Elite Ultra Wall and Floor • Elite Fire Tube Ultra • EFW Series'). The page copy describes a 'modulating, condensing, stainless steel, wall mount boiler' available in sizes from 285,000 to 399,000 BTU/hr with modulation up to a 10:1 turndown, top or bottom supply and return connections, top or bottom gas connections, vent runs of up to 150 ft for the 285 and 100 ft for the 340-399, and five vent termination options.
The in-page rating table prints the three models: EFW-285WBN (28.5-285 MBH input, 263 MBH heating capacity, 228 MBH net AHRI water rating, 95% AFUE, 1-1/4 in. male water connections, 3 in. vent/air, 180 lb with water, 4.9 gal water content), EFW-340WBN (39.9-340 MBH input, 324 MBH capacity, 282 MBH net, 95.4% thermal efficiency, 1-1/2 in. water, 4 in. vent/air, 250 lb, 7.1 gal) and EFW-399WBN (39.9-399 MBH input, 380 MBH capacity, 330 MBH net, 95.4% thermal efficiency, 1-1/2 in. water, 4 in. vent/air, 250 lb, 6.4 gal). All three run on 120 V / 1 Ph / 60 Hz at less than 12 A.
The EFW uses an ASME 'H' stamped SA240-S43932 stainless-steel down-fired fire-tube heat exchanger with a dimpled-tube design, a direct-spark ignition, a 10k outdoor sensor, an integrated low-water cut-off with test switch, an advanced Honeywell Sola boiler controller with backlit display, Modbus RTU, DHW priority, outdoor reset, warm-weather shutdown and lead-lag cascade of up to eight EFW boilers. Field conversion from factory natural gas to propane uses the documented conversion kits. Boilers.ca found no official statement of Canadian sales on htproducts.com, so canadianStatus stays 'unknown'; gas, combustion and venting work belongs with a licensed contractor against the EFW I&O manual (420011327000).
Highlights
The ELU/EFTU/EFW limited warranty document (420030066700, 07-07-23) covers the EFW: basic coverage of all components including the pressure vessel for years 1-5 at 100%, extending for registered installations to 100% pressure-vessel coverage in years 6-10 and 20% in years 11-15; the product page states a free 5-year parts warranty when registered upon installation.
Models
One canonical page per model with input, output and efficiency kept separate.
The HTP EFW-285WBN is the 285 MBH class wall-mount model of the current EFW (Elite Firetube Wall Mount) line: 28.5 to 285 MBH input, 263 MBH heating capacity, a 228 MBH net AHRI water rating at 95% AFUE, a 3" vent connection and a 180 lb wall package with the Honeywell Sola control.
The HTP EFW-340WBN is the 340 MBH class wall-mount model of the current EFW (Elite Firetube Wall Mount) line: 39.9 to 340 MBH input, 324 MBH heating capacity, a 282 MBH net AHRI water rating at 95.4% thermal efficiency, a 4" vent connection and a 250 lb wall package with the Honeywell Sola control.
The HTP EFW-399WBN is the 399 MBH class wall-mount model of the current EFW (Elite Firetube Wall Mount) line: 39.9 to 399 MBH input, 380 MBH heating capacity, a 330 MBH net AHRI water rating at 95.4% thermal efficiency, a 4" vent connection and a 250 lb wall package with the Honeywell Sola control.
| Specification | HTP EFW-285WBN | HTP EFW-340WBN | HTP EFW-399WBN |
|---|---|---|---|
| Input rate, minimum | 28.5 MBH | 39.9 MBH | 39.9 MBH |
| Input rate, maximum | 285 MBH | 340 MBH | 399 MBH |
| output-max | — | — | — |
| DOE AFUE | 95 % | — | — |
| Turndown | Up to 10:1 | Up to 10:1 | Up to 10:1 |
| vent-max-3 | — | — | — |
| vent-max-2 | — | — | — |
| Approximate boiler weight with water | 180 lb | 250 lb | 250 lb |
Read the full comparison: HTP EFW-285WBN vs EFW-340WBN →
Read the full comparison: HTP EFW-340WBN vs EFW-399WBN →
Read the full comparison: HTP EFW-285WBN vs HTP EFW-399WBN →
Error codes and alerts
No alerts documented for this series yet.
Manuals
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.
Services for HTP boilers
Three: EFW-285WBN, EFW-340WBN and EFW-399WBN, spanning 285,000 to 399,000 BTU/hr input with heating capacities of 263, 324 and 380 MBH.
The in-page rating table prints 95% AFUE for the EFW-285WBN and 95.4% thermal efficiency for the EFW-340WBN and EFW-399WBN; the page copy summarizes this as 'up to 95% AFUE and 95.4 thermal efficiency'.
The official page states up to 150 ft for the 285 and 100 ft for the 340-399, in PVC, CPVC, polypropylene or stainless steel, with five vent termination options; the 285 vents in 3 in. pipe and the 340/399 in 4 in.
No official statement of Canadian sales or distribution was found on the official pages checked on September 9, 2026, so canadianStatus is recorded as 'unknown'. This hub documents the series for information and service planning.
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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.