Burnham Alta ALTA-180
The Burnham Alta ALTA-180 is the top heating-only Alta: 20 to 180 MBH input at 95.0% AFUE with 169 MBH heating capacity and a 147 MBH net AHRI water rating, at 103 lb in the 20.4 in-deep chassis.
Key figures
- Max input
- 180 MBH
- Max CSA output
- —
- AFUE
- 95 %
- Min input
- 20 MBH
Input is gas energy consumed; output is heat delivered. Never size from input alone.
Burnham Alta ALTA-180 in practice
The ALTA-180 tops the heating-only Alta range at a 20–180 MBH heating input, printing 169 MBH heating capacity and a 147 MBH net AHRI water rating at 95.0% AFUE in the official Alta Product Data Sheet ratings table (5/26 print). It carries the family's OneTouch combustion management with sensor-less rate-based reset, the 316L stainless steel heat exchanger and heating-only configuration (indirect tank for domestic hot water).
It shares the 20.4 in boiler depth and 103 lb weight of the ALTA-150 while adding 28 MBH of input ceiling (180 vs 150) — the top printed heating input of the six-model Alta table. Venting is 2" CPVC/PVC or polypropylene; the Grundfos 26-99 circulator, 50 psi MAWP with 30 psi relief, natural-gas setup with no-kit LP conversion and 10,100 ft 'G00' altitude capability all apply.
All installation, gas, combustion and venting work belongs with a licensed contractor, sized from a heat-loss calculation. Canadian buyers should confirm supply and CSA/code compliance for the specific model before purchase, since usboiler.net prints no Canadian availability statement.
Best suited to
- Larger homes and high-recovery systems needing the full 180 MBH heating ceiling
- Heating-only projects that pair the boiler with an indirect tank at the top of the Alta table
- Owners who want 95.0% AFUE without combi complexity
Applicability and support
- Model number
- ALTA-180
- 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 Burnham. Units are shown with every value; notes flag conflicting sources or missing figures.
| Specification | Value | Note |
|---|---|---|
| Input | ||
| Heating input, minimum | 20 MBH | Minimum heating input per the Alta Product Data Sheet ratings table. |
| Heating input, maximum | 180 MBH | Maximum heating input per the Alta Product Data Sheet ratings table. |
| Output | ||
| Heating capacity | 169 MBH | Heating capacity per the Alta Product Data Sheet ratings table. |
| Net AHRI water rating | 147 MBH | Net AHRI water ratings based on a piping and pickup allowance of 1.15, per the PDS ratings table. |
| Efficiency | ||
| Efficiency (AFUE) | 95 % | 95.0% AFUE printed for this model in the Alta Product Data Sheet ratings table. |
| Domestic hot water | ||
| Domestic hot water | Heating-only boiler — domestic hot water comes from a separate indirect tank or water heater | A primary/secondary manifold accessory kit (P/N 111884-01) is available for heating-only models; no integrated DHW. |
| Venting and air | ||
| Venting | Direct vent, sealed combustion — 2" universal vent connection (CPVC/PVC or polypropylene) | 2" universal vent connection and 2" air intake per the PDS; horizontal 2-pipe, vertical 2-pipe, concentric and hybrid configurations, plus a polypropylene chimney chase option. |
| Vent size | 2 in | Vent size column of the PDS ratings table prints 2 in for every Alta model. |
| Physical and connections | ||
| Boiler weight | 103 lb | Boiler weight per the Alta Product Data Sheet ratings table. |
| Boiler depth | 20.4 in | Boiler depth dimension 'A' per the PDS ratings and specifications table. |
| Gas connection | 1/2" NPT | 1/2" NPT gas connection as printed on the PDS connection figure. |
| Electrical | ||
| Electrical | 120 VAC connection board | 120 VAC connection board and separate low-voltage connection board per the PDS exploded view. |
| Operating limits and other | ||
| Fuel | Natural gas or propane | Ships set for natural gas; two-step LP conversion at the gas valve switch and display — no kit purchase required, per the Alta Product Data Sheet. |
| Controls | OneTouch system — automatic combustion management, sensor-less rate-based reset, built-in self diagnostics, warm weather shutdown | Automatically sets combustion at start-up and continuously optimizes; outdoor-reset performance without an outdoor sensor. Not a Sage controller (verified in batch8 research). |
| Heat exchanger | 316L stainless steel heat exchanger, corrosion resistant | World-leading 316L stainless steel per the PDS standard-equipment list; 12-year limited warranty per the product page. |
| Minimum gas supply pressure | 2.5 in. w.c. NG / 8.0 in. w.c. LP | Low gas pressure capability as printed on the PDS standard-equipment list. |
| Maximum allowable working pressure (MAWP) | 50 psi | Safety relief valve pressure, water: 30 PSI standard, ASME certified 'H'; maximum allowable working pressure 50 PSI, per the PDS. |
| Safety relief valve | 30 psi | 30 PSI standard per the PDS ratings and specifications notes. |
| Maximum allowable temperature setting | 210 °F | Maximum allowable temperature setting 210°F; target setpoint 180°F; manual reset high limit setpoint 210°F, per the PDS. |
| Altitude rating | 10,100 ft | Altitude capability to 10,100 ft on 'G00' suffix models (installed and set for altitude), per the PDS. |
| Circulator | Grundfos 26-99 | Grundfos 26-99 circulator on heating-only models, per the PDS. |
Alerts documented for this model
None documented yet.
Frequently asked questions
What are the ALTA-180's ratings?
20–180 MBH heating input, 169 MBH heating capacity, a 147 MBH net AHRI water rating and 95.0% AFUE per the Alta Product Data Sheet.
Which Alta is the largest heating-only model?
The ALTA-180 — no larger heating-only input appears in the PDS table; the only bigger printed number is the ALTAC-200 combi's 200 MBH DHW input.
Does the ALTA-180 produce domestic hot water?
No. It is heating-only; domestic hot water comes from a separate indirect tank or water heater.
Questions about the Burnham Alta ALTA-180?
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
- U.S. Boiler Company — ALTA High Efficiency Condensing Boiler product page · accessed September 9, 2026
- Alta Product Data Sheet — ratings & specifications table (5/26 print, PDF) · accessed September 9, 2026
Facts checked September 9, 2026. Last updated September 9, 2026. Technical reviewer: not yet assigned.