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Viessmann · Vitogas 050 (ECD / ECV / RS)

Viessmann Vitogas 050 ECV-140

The Vitogas 050 ECV-140 is a five-section ECV boiler: 140 MBH input (41 kW), 118 MBH output and 83.1% AFUE.

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-140 in practice

The ECV-140 is rated 140 MBH (41 kW) input and 118 MBH (35 kW) output at 83.1% AFUE, with five cast-iron sections, four burners and 4.3 USG of boiler water.

Weight is 364 lb (165 kg) and the cabinet measures 533 x 502 mm (21 x 19¾ in) at 1030 mm height. The 3 in. power-vent collar and 50 psig maximum operating pressure carry through from the smaller ECV sizes.

Best suited to

  • Existing ECV-140 installations needing printed ratings
  • Residential loads between the ECV-115 and ECV-155
  • Documentation for five-section ECV builds

Applicability and support

Model number
ECV-140
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-140 specifications
SpecificationValueNote
Input
CSA input (natural gas)140 MBH41 kW, per the technical data manual
Output
CSA output / DOE output118 MBH35 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)364 lb165 kg
Overall width533 mmPrinted as 21 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 sections54 burners.
Boiler water content4.3 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-140 rated at?

140 MBH (41 kW) input, 118 MBH (35 kW) output and 83.1% AFUE, with five cast-iron sections and four burners.

How wide is the ECV-140?

533 mm (21 in) overall, 502 mm (19¾ in) deep and 1030 mm (41½ in) high, at 364 lb (165 kg).

Is the ECV-140 chimney-vented?

No. All ECV sizes use a 3 in. power-vent collar with a maximum equivalent vent run of 20 ft (6 m).

Questions about the Viessmann Vitogas 050 ECV-140?

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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