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Viessmann · Vitogas 050 (ECD / ECV / RS)

Viessmann Vitogas 050 ECV-65

The Vitogas 050 ECV-65 is the smallest ECV boiler: 65 MBH input (19 kW), 55 MBH output and 83.1% AFUE with a 3 in. power-vent collar.

DiscontinuedHistorically in Canada
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Key figures

Max input
—
Max CSA output
—
AFUE
83.1 %
Min input
—
Natural gasPropaneHeating-onlyresidential

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

Viessmann Vitogas 050 ECV-65 in practice

The ECV-65 is the entry size of the ECV variant: 65 MBH (19 kW) input and 55 MBH (16 kW) output at 83.1% AFUE, with three cast-iron sections, two burners and 2.6 USG of boiler water.

It weighs 243 lb (110 kg) and measures 340 x 502 mm (13½ x 19¾ in) with a 1030 mm (41½ in) height. Unlike the chimney-vented ECD, the ECV uses a 3 in. vent collar with a maximum equivalent vent run of 20 ft (6 m) and a 50 psig maximum operating pressure.

Best suited to

  • Existing ECV-65 installations needing printed ratings
  • Small residential loads where a 3 in. power-vent route suits the retrofit
  • Comparing the ECV variant against the ECD-65

Applicability and support

Model number
ECV-65
Canadian availability
historical
Production status
discontinued
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.

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Specifications

Published specifications

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

Viessmann Vitogas 050 ECV-65 specifications
SpecificationValueNote
Input
CSA input (natural gas)65 MBH19 kW, per the technical data manual
Output
CSA output / DOE output55 MBH16 kW
Efficiency
Efficiency (AFUE)83.1 %Printed as 83.1% AFUE on all eight ECV sizes.
Venting and air
Vent pipe collar3 inMaximum equivalent vent run 20 ft (6 m) with 3 in. vent pipe.
Physical and connections
Weight (with insulation, burners and packaging)243 lb110 kg
Overall width340 mmPrinted as 13½ in
Overall depth502 mm19¾ in
Overall height1,030 mmPrinted as 41½ in
Operating limits and other
FuelNatural gas or propane3.5 in. w.c. manifold pressure NG; 10 in. w.c. propane.
Cast iron sections32 burners.
Boiler water content2.6 USGPer the technical data manual.
Maximum operating pressure50 psig345 kPa.
Boiler supply / return1¼ in. male threadGas supply ½ in. male thread.

Manuals

Alerts documented for this model

None documented yet.

Services

Related parts & service

Frequently asked questions

What is the ECV-65 rated at?

65 MBH (19 kW) input, 55 MBH (16 kW) output and 83.1% AFUE, with three cast-iron sections and two burners.

How does the ECV differ from the ECD?

The ECV is the power-vent variant: it uses a 3 in. vent collar with a 20 ft maximum equivalent vent run and prints a uniform 83.1% AFUE, while the ECD is chimney-vented with a draft hood and vent damper.

Is the ECV-65 still sold?

No. The Vitogas 050 line is discontinued; its technical data manuals and instructions remain in Viessmann Canada's historic manuals.

Questions about the Viessmann Vitogas 050 ECV-65?

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 778-909-5731Request service

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Sources and verification

Facts checked September 9, 2026. Last updated September 9, 2026. Technical reviewer: not yet assigned.

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