HTP PHR160-55
The HTP PHR160-55 is the 160 MBH class model of the retired Pioneer 55-gallon high-mass condensing heater line: 40,000 to 160,000 BTU/hr input, 95% printed thermal efficiency and a 260 lb package, recorded from the official retired Pioneer table and LP-325 Table 4.
Key figures
- Max input
- 160 MBH
- Max CSA output
- —
- AFUE
- —
- Min input
- 40 MBH
Input is gas energy consumed; output is heat delivered. Never size from input alone.
HTP PHR160-55 in practice
The PHR160-55 is one of the four Pioneer models (PHR100-55 through PHR199-55) on HTP's retired product page. The official page table prints a 40,000 to 160,000 BTU/hr modulation range at 95% thermal efficiency, and LP-325 Table 4 adds a 260 lb shipping weight, 55 gal of water content, a 23" x 56" x 34" (W x H x D) cabinet and 1-1/4" NPT female supply/return with 3/4" NPT gas.
The Pioneer is a high-mass design: a 90/10 cupronickel primary and 800H stainless/cupronickel secondary heat exchanger with a built-in 304L stainless steel buffer tank that HTP describes as eliminating primary/secondary piping. The retired page prints a five to one turndown, up to 95% thermal efficiency, SCAQMD Rule 1146.2 compliance, a 926 SIT control with outdoor reset and indirect priority, cascade support, and 12-year limited warranty. Venting is 3" (200 ft) or 4" (200 ft), combined equivalent feet in PVC, CPVC, polypropylene or stainless steel.
The Pioneer is retired: HTP's discontinued-products index lists 'Pioneer' and the retired page remains posted without a sales channel. Boilers.ca records it with productStatus 'discontinued' and canadianStatus 'unknown'; no official Canadian sales statement was found. Service an installed unit with a licensed contractor against LP-325.
Best suited to
- Identifying a retired Pioneer high-mass heater already installed
- Retrieving the official LP-325/LP-348/LP-349 documentation for service planning
- Replacement comparisons against a modern modulating condensing boiler
Applicability and support
- Model number
- PHR160-55
- Canadian availability
- unknown
- Production status
- discontinued
- ROMA supplies
- Confirmed at consultation
- ROMA services
- Confirmed at consultation
- Warranty
- Series terms
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.
Specifications
Published specifications
Values as published by HTP. Units are shown with every value; notes flag conflicting sources or missing figures.
| Specification | Value | Note |
|---|---|---|
| Input | ||
| Input rate, minimum | 40 MBH | 40,000 BTU/hr, as printed in LP-325 Table 4 and on the retired Pioneer page table. |
| Input rate, maximum | 160 MBH | 160,000 BTU/hr, as printed in LP-325 Table 4 and on the retired Pioneer page table. |
| Efficiency | ||
| Thermal efficiency (as printed) | 95 % | As printed on the retired Pioneer page table and LP-325 Table 4; the page copy says 'up to a 95% thermal efficiency rating'. |
| Venting and air | ||
| Venting | 3" (200 ft) or 4" (200 ft), combined equivalent feet | Category IV sealed-combustion direct vent, power vent; PVC, CPVC, polypropylene or stainless steel per LP-325 Table 4. |
| Physical and connections | ||
| Shipping weight | 260 lb | 260 lbs printed for every Pioneer size in LP-325 Table 4 and on the page table. |
| Tank water content | 55 gal | 55-gallon high-mass tank as printed in LP-325 Table 4; the page describes it as a '55 gallon high mass unit' with a built-in buffer tank. |
| Dimensions (W x H x D) | 23" x 56" x 34" | As printed in LP-325 Table 4 (Figure 3 dimensions table prints 23" x 53" x 34" overall with 55 gal). |
| Gas inlet connection | 3/4" NPT | LP-325 Table 4; drain 1" NPT. |
| Maximum water pressure | 30 psi | As printed in LP-325 Table 4. |
| Heat exchanger | 90/10 cupronickel primary with 800H stainless steel and cupronickel secondary tubing | LP-325 Table 4 materials; 304L stainless steel tank. |
| Operating limits and other | ||
| CH supply/return connection | 1-1/4" NPT (female) | LP-325 Table 4; the submittal prints '1 1/4" system return and supply connection'. |
| Control | 926 SIT control with LCD display and LED indicators | Outdoor reset with indirect priority, cascade up to 8 units per the LP-348 submittal. |
| Turndown | 5:1 | Page copy: 'Its modulation provides a five to one turndown ratio'; LP-348 prints 'up to 5 to 1 turndown'. |
| Warranty | 12-year limited out of the box, no registration required | Retired Pioneer page: 'backed by a limited 12 year warranty, right out of the box! No registration is required.' |
Manuals
- HTP Pioneer Heating Appliance Installation, Start-Up, Maintenance Manual — LP-325 Rev. 010 Rel. 001 (12.8.21; for appliances manufactured after April 10, 2017)LP-325 Rev. 010 (12.8.21) · 2021-12-08
- HTP Pioneer Heating Appliance Submittal Sheet — LP-348 Rev. 8.27.21LP-348 (8.27.21) · 2021-08-27
- HTP Pioneer Heating Appliance Specification Sheet — LP-349LP-349
Frequently asked questions
What is the input range of the PHR160-55?
LP-325 Table 4 and the retired page print 40,000 to 160,000 BTU/hr with 95% thermal efficiency.
Is the Pioneer still sold?
No — HTP's discontinued-products index lists the Pioneer, and the retired product page remains as documentation only.
Does the Pioneer need primary/secondary piping?
The retired page states the built-in buffer tank 'eliminates the need for primary/secondary piping design due to thermal mass'; LP-325 still requires installation per its piping instructions.
Questions about the HTP PHR160-55?
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.
Sources and verification
- HTP — The Pioneer (retired page, model table) · accessed September 9, 2026
- HTP — Pioneer documents · accessed September 9, 2026
- Pioneer Installation Manual, LP-325 Rev. 010 (12.8.21) · accessed September 9, 2026
- Pioneer Submittal Sheet, LP-348 (8.27.21) · accessed September 9, 2026
- HTP — Discontinued Products index · accessed September 9, 2026
Facts checked September 9, 2026. Last updated September 9, 2026. Technical reviewer: not yet assigned.