Canada-wide gas boiler information · On-site service in Greater Vancouver, BC
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De Dietrich · Series
The De Dietrich MCA Pro is a condensing, fully modulating wall-hung boiler with a cast-aluminum heat exchanger — in NA since 2007 — sized 45/65/90/115 kW (156/235/326/399 MBH input range) for residential and light-commercial gas or propane applications, with cascade configurations of 2 to 8 boilers.
Series facts
De Dietrich's NA site presents the MCA Pro as a 'condensing cast aluminum' wall-hung boiler with a 'rugged cast aluminum heat exchanger with a 30 year proven performance record' (page copy), an input range of 156 to 399 MBH, and residential and light-commercial gas or propane labelling. The model/Revit list maps the sizes as MCA PRO 45/65/90/115 kW = 156/235/326/399 MBH.
De Dietrich states it 'established themselves in the North American condensing market' with the release of fully modulating condensing cast-aluminum boilers in 2007, through the DDR Americas network. The MCA Pro page prints cascade configurations of 2 to 8 boilers standard with 'any configuration possible'.
Public downloads on the product page include the brochure/flyer, the I&O manual (MCAPro-ISM Rv.5.4) and full documentation; the I&O, submittal, spec-data and flyer PDFs are linked from this hub. Because no numeric efficiency percentage is printed in the captured page text, the structured efficiency field stays empty.
Highlights
Models
One canonical page per model with input, output and efficiency kept separate.
De Dietrich
The De Dietrich MCA Pro 45 is a condensing wall-hung boiler rated 34–156 MBH input and 33–146 MBH output at 94.0% CSA thermal efficiency, with 1-1/4" heating connections and a 117 lb dry weight.
De Dietrich
The De Dietrich MCA Pro 65 is a condensing wall-hung boiler rated 34–235 MBH input and 45–222 MBH output at 94.0% CSA thermal efficiency, with 1-1/4" heating connections and a 133 lb dry weight.
De Dietrich
The De Dietrich MCA Pro 90 is a condensing wall-hung boiler rated 55–326 MBH input and 54–306 MBH output at 94.0% CSA thermal efficiency, with 1-1/4" heating connections and a 148 lb dry weight.
De Dietrich
The De Dietrich MCA Pro 115 is a condensing wall-hung boiler rated 82–399 MBH input and 79–368 MBH output at 94.0% CSA thermal efficiency, with 1-1/4" heating connections and a 150 lb dry weight.
| Specification | De Dietrich MCA Pro 45 | De Dietrich MCA Pro 65 | De Dietrich MCA Pro 90 | De Dietrich MCA Pro 115 |
|---|---|---|---|---|
| Minimum input (as printed) | 34 MBH | 34 MBH | 55 MBH | 82 MBH |
| Maximum input (as printed) | 156 MBH | 235 MBH | 326 MBH | 399 MBH |
| Maximum heat output | 146 MBH | 222 MBH | 306 MBH | 368 MBH |
| afue | — | — | — | — |
| Firing | Modulating, on/off, remote 0–10 V | Modulating, on/off, remote 0–10 V | Modulating, on/off, remote 0–10 V | Modulating, on/off, remote 0–10 V |
| vent-max-3 | — | — | — | — |
| vent-max-2 | — | — | — | — |
| Weight (dry / wetted) | 117 lb dry / 130 lb wetted | 133 lb dry / 147 lb wetted | 148 lb dry / 165 lb wetted | 150 lb dry / 167 lb wetted |
Read the full comparison: De Dietrich MCA Pro 45 vs MCA Pro 115 →
Read the full comparison: De Dietrich MCA Pro 65 vs MCA Pro 90 →
Read the full comparison: De Dietrich MCA Pro 45 vs Pro 65 →
Read the full comparison: De Dietrich MCA Pro 90 vs Pro 115 →
Error codes and alerts
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 De Dietrich boilers
Yes. De Dietrich's NA site categorizes the MCA Pro as a condensing cast-aluminum wall-hung boiler with fully modulating firing.
The NA pages print MCA PRO 45/65/90/115 kW, equivalent to 156/235/326/399 MBH, with an input range of 156 to 399 MBH.
Yes — the product page states cascade configurations of 2 to 8 boilers are standard, with any configuration possible.
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
Facts checked September 9, 2026. Last updated September 9, 2026. Technical reviewer: not yet assigned.