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Viessmann · Vitogas 050 (ECD / ECV / RS)

Viessmann Vitogas 050 ECD-100

The Vitogas 050 ECD-100 is a four-section ECD boiler: 100 MBH input (29 kW), 83 MBH output and 83.5% AFUE with a 6 in. vent collar.

DiscontinuedHistorically in Canada
Service this modelEstimate a replacement

Key figures

Max input
—
Max CSA output
—
AFUE
83.5 %
Min input
—
Natural gasPropaneHeating-onlyresidential

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

Viessmann Vitogas 050 ECD-100 in practice

The ECD-100 is rated 100 MBH (29 kW) input and 83 MBH (24 kW) output at 83.5% AFUE. It steps up to four cast-iron sections and three burners, with 3.5 USG of boiler water and a 6 in. vent collar.

Weight rises to 285 lb (130 kg) and the cabinet widens to 432 mm (17 in) while keeping the 502 mm depth and 1035 mm height. The 50 psig maximum operating pressure and atmospheric, chimney-vented design carry over from the smaller ECD sizes.

Best suited to

  • Existing ECD-100 installations needing printed ratings
  • Residential loads between the ECD-80 and ECD-115
  • Documentation for four-section ECD builds

Applicability and support

Model number
ECD-100
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.

See all service areas

Specifications

Published specifications

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

Viessmann Vitogas 050 ECD-100 specifications
SpecificationValueNote
Input
CSA input (natural gas)100 MBH29 kW, per the technical data manual
Output
CSA output / DOE output83 MBH24 kW
Efficiency
Efficiency (AFUE)83.5 %With intermittent pilot electronic ignition system and vent damper.
Venting and air
Vent pipe collar6 inChimney-vented with draft hood; each ECD ships with a vent damper.
Physical and connections
Weight (with insulation, burners and packaging)285 lb130 kg
Overall width432 mmPrinted as 17 in
Overall depth502 mm19¾ in
Overall height1,035 mmPrinted as 40¾ in
Operating limits and other
FuelNatural gas or propane3.5 in. w.c. manifold pressure NG; 10 in. w.c. propane.
Cast iron sections43 burners.
Boiler water content3.5 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 ECD-100 rated at?

100 MBH (29 kW) input, 83 MBH (24 kW) output and 83.5% AFUE, with four cast-iron sections and three burners.

How wide is the ECD-100?

432 mm (17 in) overall width, 502 mm (19¾ in) depth and 1035 mm (40¾ in) height, weighing 285 lb (130 kg).

What vent collar does the ECD-100 use?

A 6 in. vent pipe collar, up from 5 in. on the ECD-65 and ECD-80.

Questions about the Viessmann Vitogas 050 ECD-100?

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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