U.S. Boiler Company Alpine ALP150B
The U.S. Boiler Company Alpine ALP150B fires 30–150 MBH input with 136 MBH DOE heating capacity and a 118 MBH net AHRI water rating at 95% AFUE — the mid-size Alpine covering most detached-home heat losses — on the stainless-steel condensing platform with the Sage2.3 touch-screen control.
Key figures
- Max input
- 150 MBH
- Max CSA output
- —
- AFUE
- 95 %
- Min input
- 30 MBH
Input is gas energy consumed; output is heat delivered. Never size from input alone.
U.S. Boiler Company Alpine ALP150B in practice
The Alpine ALP150B is a stainless-steel condensing gas boiler rated at 30–150 MBH input. Its row in the Alpine Product Data Sheet (Form HYDL04081) prints 136 MBH DOE heating capacity and a 118 MBH net AHRI water rating at 95% AFUE. Ratings are for sea level to 2,000 feet and de-rate four percent per additional 1,000 feet.
The boiler ships at approximately 182 lb and measures 19-11/16" wide by 32-3/16" high per the data sheet dimension table. Venting is 3" for exhaust and air intake, and the vent table allows 3" intake/vent to 135 ft per side. Standard equipment includes the Sage2.3 control with LCD touch screen, variable-speed combustion blower, negative-pressure gas valve, stainless-steel heat exchanger, a 30 PSI safety relief valve (50 PSI on the ALP399C) and outdoor reset with a wired outside sensor; the 80–210 sizes are wall or floor mountable and the ALP285B/ALP399C are floor mounted.
Boilers.ca documents this size at model level for identification and service planning. Installation, gas, electrical and venting work belongs with a licensed contractor working from the Alpine I&O manual. No official Canadian-sales statement was found, so canadianStatus stays 'unknown'.
Best suited to
- 30-to-150 MBH residential heat-loss loads
- Homes pairing the boiler with an indirect water heater
- Buyers comparing the six Alpine sizes on the shared Product Data Sheet
Applicability and support
- Model number
- ALP150B
- Canadian availability
- unknown
- Production status
- current
- 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 U.S. Boiler Company. Units are shown with every value; notes flag conflicting sources or missing figures.
| Specification | Value | Note |
|---|---|---|
| Input | ||
| Input, minimum | 30 MBH | Minimum input per the Alpine Product Data Sheet ratings table (sea level to 2,000 ft). |
| Input, maximum | 150 MBH | Maximum input per the Alpine Product Data Sheet ratings table; ratings de-rate four percent per 1,000 ft above 2,000 ft. |
| Output | ||
| DOE heating capacity | 136 MBH | DOE heating capacity per the Alpine Product Data Sheet ratings table. |
| Net AHRI water rating | 118 MBH | Net AHRI water rating per the Alpine Product Data Sheet (piping and pickup allowance applied per the table notes). |
| Efficiency | ||
| Efficiency (AFUE) | 95 % | AFUE per the Alpine Product Data Sheet ratings table; the product page headlines 95% AFUE and ENERGY STAR certification. |
| Domestic hot water | ||
| Domestic hot water | Heating-only boiler — domestic hot water comes from a separate indirect tank or water heater | |
| Venting and air | ||
| Vent and intake size | 3" | Vent and air-intake size per the Product Data Sheet vent table: 3" intake/vent to 135 ft per side. |
| Venting | Direct vent, sealed combustion, Category IV | Direct-vent sealed-combustion appliance with CPVC-to-PVC vent kit included (30" CPVC, 90° elbow, two vent terminals, screens) per the standard equipment list. |
| Physical and connections | ||
| Approx. shipping weight | 182 lb | Approximate shipping weight per the Alpine Product Data Sheet ratings table. |
| Dimensions (width × height) | 19-11/16" × 32-3/16" | Cabinet width and height per the Alpine Product Data Sheet dimension table. |
| Supply/return connections | 1" NPT (3/4" return tapping on ALP080B/ALP105B per the dimension table) | Water connection sizes per the Alpine Product Data Sheet dimension and connection data. |
| Gas connection | 1/2" NPT (3/4" on ALP285B/ALP399C per the dimension table) | Gas valve inlet size per the Alpine Product Data Sheet dimension table. |
| Operating limits and other | ||
| Control | Sage2.3 Boiler Control System with LCD touch screen | Sage2.3 control with self-guided menus, 100+ help screens, built-in self diagnostics, three circulator outputs, eight-boiler sequencer, 4–20 MV inputs, outdoor reset, DHW priority and warm-weather shutdown per the data sheet. |
| Fuel | Natural gas or LP gas | Boilers shipped set for natural gas with field adjustment for LP per the Product Data Sheet notes. |
Manuals
Frequently asked questions
What are the Alpine ALP150B's ratings?
30–150 MBH input, 136 MBH DOE heating capacity and a 118 MBH net AHRI water rating at 95% AFUE per the Alpine Product Data Sheet.
Can the Alpine ALP150B be wall mounted?
Yes — the Product Data Sheet lists the 80 through 210 sizes for wall or floor mounting with a pre-installed hanging bracket and wall-mount kit included (no kits required).
Questions about the U.S. Boiler Company Alpine ALP150B?
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.
Compare and explore
- U.S. Boiler Company Alpine ALP105B vs ALP150BComparison
- U.S. Boiler Company Alpine ALP150B vs ALP210BComparison
- U.S. Boiler Company Alpine ALP080BSame series
- U.S. Boiler Company Alpine ALP105BSame series
- U.S. Boiler Company Alpine ALP210BSame series
- U.S. Boiler Company Alpine ALP285BSame series
- U.S. Boiler Company Alpine ALP399CSame series
- Alpine series hub
- Buying guide
Sources and verification
- U.S. Boiler Company — Alpine High Efficiency Condensing Gas Boiler product page · accessed September 9, 2026
- Alpine Product Data Sheet, Form HYDL04081 (PDF) · HYDL04081 · accessed September 9, 2026
- Alpine Installation, Operating and Service Instructions (PDF) · accessed September 9, 2026
Facts checked September 9, 2026. Last updated September 9, 2026. Technical reviewer: not yet assigned.