HTP UFT-175W

The HTP UFT-175W is the 175 MBH class wall-mounted model of HTP's Universal Fire Tube (UFT) medium-mass condensing boiler line: 19.9 to 175 MBH natural-gas input, 95.9% DOE AFUE and 166 MBH heating capacity in a 110 lb wall cabinet.

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Key figures

Max input: 175 MBH
Max CSA output: —
AFUE: 95.9 %
Min input: 19.9 MBH

Natural gasPropaneHeating-onlyresidential

Input is gas energy consumed; output is heat delivered. Never size from input alone.

HTP UFT-175W in practice

The UFT-175W is the wall-mounted version of the 175 size in HTP's UFT (Universal Fire Tube) medium-mass boiler family, fired by a ceramic-fiber infrared premix burner over a 316L stainless steel fire-tube heat exchanger with aluminum fins. The official table prints 19.9 to 175.0 MBH natural-gas input at 95.9% DOE AFUE with 166 MBH heating capacity, a 10:1 turndown (the LP-555 submittal lists 8.79:1 for the 175 MBH models) and a 12–30 psi water-pressure rating. Every UFT size vents as a sealed-combustion direct-vent appliance in Schedule 40 PVC, CPVC or polypropylene, to 50 ft in 2" pipe or 100 ft in 3" pipe, and the wall cabinet carries 1-1/4" NPT CH supply/return connections.

The matching floor-standing sibling (UFT-175F) shares the same inputs and ratings in the 140 lb floor frame — floor models move their piping adapters from side to side and use a 3/4" PVC socket condensate connection. The wall-mount bracket is included with wall models. HTP markets the UFT family as rated one of the most efficient boilers by ENERGY STAR for three years running and SCAQMD low-NOx listed, and the UFT's 2026 catalogue entries and the LP-542 Rev.002 manual remain live on the official site.

Boilers.ca records this UFT model with productStatus 'unknown': HTP's product page, 2026 catalogues and current manual stay live without a discontinuation notice, while the UFT family is absent from the manufacturer's 2026 main space-heating navigation and appears in the site's discontinued-products literature index. No official statement of Canadian sales was found, so canadianStatus stays 'unknown'; gas work on an installed unit belongs with a licensed contractor against LP-542.

Best suited to

Homes whose heat-loss calculation fits inside 175 MBH of input
Wall-mounted installations keeping the medium-mass UFT cabinet footprint
Systems wanting PVC/CPVC/polypropylene venting and a 10:1-modulating premix burner

Applicability and support

Model number: UFT-175W
Canadian availability: unknown
Production status: unknown
ROMA supplies: Confirmed at consultation
ROMA services: Confirmed at consultation
Warranty: Not verified

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.

See all service areas

Specifications

Published specifications

Values as published by HTP. Units are shown with every value; notes flag conflicting sources or missing figures.

HTP UFT-175W specifications
Specification	Value	Note
Input
Input rate, minimum (natural gas)	19.9 MBH	19,900 BTU/hr, as printed in the official six-model UFT table.
Input rate, maximum (natural gas)	175 MBH	175,000 BTU/hr, as printed in the official six-model UFT table.
Output
Heating capacity	166 MBH	Heating capacity in MBH as printed in the official technical table.
Efficiency
DOE AFUE	95.9 %	DOE AFUE as printed for the model on the UFT product page table.
Venting and air
Venting	2" to 50 ft or 3" to 100 ft, combined equivalent feet	Sealed combustion direct vent / power vent; Schedule 40 PVC, CPVC or polypropylene. The air-intake and exhaust adapters are 3". Per LP-555, the same 50 ft / 100 ft limits apply to every UFT size.
Physical and connections
Weight, wall-mount model	110 lb	Wall-mounted version 110 lb. A matching floor-standing version of this size (UFT-175F) is rated 140 lb; the floor model's condensate adapter is a 3/4" PVC socket and its piping adapters can move between sides.
Dimensions, wall model (W x H x D)	19.7" x 37" x 16.8"	The 175/199 sizes share the larger wall cabinet (and the 22" x 48" x 18" floor frame).
Gas supply pressure	Natural gas 3.5"–14" w.c.; LP 8"–13" w.c.	As printed in the official technical specifications.
Water pressure (system)	12–30 psi	Minimum 12 psi to maximum 30 psi as printed in the technical specifications.
Heat exchanger	316L stainless steel fire tube with internal aluminum fins, 3 gal water capacity	All 316L stainless steel ASME 'H' stamped construction; National Board listed per LP-555.
Electrical
Power supply	120 V / 60 Hz, 6 A, maximum power consumption 160 W
Operating limits and other
Fuel	Natural gas or propane	LP versions of the model code carry an 'LP' suffix, which denotes propane gas per the I&O manual cover.
Connections	CH supply/return 1-1/4" NPT; gas inlet 3/4" NPT; condensate 1/2" NPT	Wall-mounted models; the condensate adapter is 1/2" NPT on wall models (3/4" PVC socket on floor models).
Turndown	10:1	The product page prints a 10 to 1 turndown; the LP-555 submittal notes the 175,000 BTU/hr models have a turndown of 8.79 to 1.
Control	P-950EH / NGTB-900C digital control with LCD	Backlit LCD; cascade up to 20 boilers; fault history of the last 10 codes; low-water cut-off probe built in.
Warranty	10-year limited residential out of the box (no registration required); 5-year limited commercial	As printed on the UFT product page and the LP-555 submittal.

Manuals

HTP UFT (Universal Fire Tube) Boiler Installation and Operation Manual — LP-542 Rev.002 Rel.001 (6.9.20; boilers made on/after 1/1/2020)LP-542 Rev.002 Rel.001 · 2020-06-09

Alerts documented for this model

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Services

Related parts & service

Frequently asked questions

What does the 175 in UFT-175W mean?

It is the size label: the wall model fires 19.9 to 175 MBH natural-gas input (19,900 to 175,000 BTU/hr). A floor-standing UFT-175F version of the same size exists with the same ratings.

Is there a floor-mounted UFT-175?

Yes — the UFT-175F floor version shares the same input, AFUE and heating-capacity figures at 140 lb, with the floor frame's own dimensions and condensate connection.

Is the UFT still a current product?

HTP keeps the UFT product page, 2026 catalogue entries and the LP-542 Rev.002 manual live, but the family is no longer in the manufacturer's main space-heating navigation and appears in the site's discontinued-products literature index, so Boilers.ca records productStatus 'unknown'.

Questions about the HTP UFT-175W?

Describe what the boiler is doing and get a straight answer about the next step.

On-site service in Greater Vancouver, BC. ROMA lists “Open 7 days” on its site; call to confirm same-day availability.

Call 778-909-5731 Request service

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Sources and verification

HTP — The UFT, Medium Mass Boiler (UFT-80W through UFT-199W) · accessed September 8, 2026
UFT Installation and Operation Manual, LP-542 Rev.002 Rel.001 (6.9.20) · accessed September 8, 2026
HTP (Heat Transfer Products) — official site · accessed September 8, 2026

Facts checked September 8, 2026. Last updated September 8, 2026. Technical reviewer: not yet assigned.