Condensing boiler · New equipmentVaillant ecoTEC plus VMW 26CS/1-5 Cf
Vaillant ecoTEC plus VMW 26CS/1-5 Cf boiler
Heating and hot water for everyday use, combined in a gas boiler.
- Gas
- Natural gas Convertible to propane
- Wi-Fi
- Optional myVAILLANT connect
- Heating
- 3.0-19.8 kW 80/60 °C
- Domestic hot water flow rate
- 12.3 l/min ΔT 30 K
Gas and Wi-Fi: compatibility and accessories
Gas and conversion: It accepts natural gas G20 and conversion to propane G31 through the manufacturer's adjustment procedure. Compatibility with butane G30 is not offered without explicit documentation for this version. The conversion and commissioning are the responsibility of a qualified professional; they are not included in the purchase. Source 1 ↗ Source 2 ↗
Wi-Fi and supply: myVAILLANT Plug & Play connectivity is optional. The environment control of the pack does not equate to having Wi-Fi: it requires the compatible module, purchased separately. Source 1 ↗ Source 2 ↗
Description
Vaillant combines home heating and hot water for taps and showers. When choosing it, both water usage and heating needs are important: a home with multiple showers running at the same time requires a different assessment.
Its micro-accumulation system helps to have hot water ready for everyday use. It is not equivalent to a large tank: the choice should take into account the flow rate you need and how many taps or showers you will use at the same time.
The interior of your boiler
What to check before installing this boiler
The choice of equipment does not replace the inspection of the installation by a qualified professional.
- Confirm the model and commercial reference, the type of gas, and the supply configuration in the manufacturer's documentation.
- Ask a qualified installer to assess the heating and domestic hot water demand; compare measured flow rates at the same temperature difference.
- Check dimensions, connections, flue gas evacuation, condensate drainage, and controls compatible with the existing installation.
- Confirm the included accessories and the delivery time before scheduling the installation. The online purchase of the equipment does not include installation or commissioning.
Technical data of Vaillant ecoTEC plus VMW 26CS/1-5 Cf boiler
- Brand
- Vaillant
- Model
- Vaillant ecoTEC plus VMW 26CS/1-5 Cf boiler
- Status
- New
- Supply scope
- With sensoHOME radio. Installation not included.
- Shipping
- Included in mainland Spain. Please confirm the deadline.
- Commercial reference
- 8000014271
Specifications and dimensions of the model
Compare each magnitude under its testing conditions: heating, domestic hot water, efficiency, and dimensions.
- Heating power G20 (80/60 °C)
- 3.0-19.8 kW
Heating - Heating power G20 (50/30 °C)
- 3.4-21.7 kW
Heating - Heating thermal load G20 (Hi)
- 3.2-20.4 kW
Heating - Adjustable flow temperature
- 30-80 °C
Heating - Maximum heating pressure
- 3 bar
Heating - Maximum power DHW G20
- 25.7 kW
Hot water - Nominal thermal load DHW G20 (Hi)
- 26.5 kW
Hot water - Specific flow rate D (ΔT 30 K, EN 13203-1)
- 12.3 l/min
Hot water - Declared domestic hot water flow rate (ΔT 25 K)
- 14.8 l/min
Hot water - Minimum starting flow rate
- 2 l/min
Hot water - Domestic hot water flow limiter
- 8.7 l/min
Hot water - Adjustable domestic hot water temperature
- 35-65 °C
Hot water - Allowed service pressure for domestic hot water
- 0.3-10 bar
Hot water - Required connection pressure for domestic hot water
- 0.7 bar
Hot water - Hot water system
- Mixed with micro-accumulation
Hot water - Heating energy class
- A
Energy and control - Energy class of domestic hot water
- A
Energy and control - Sanitary profile
- XL
Energy and control - Standby power consumption
- Less than 2 W
Energy and control - myVAILLANT connectivity
- Optional Plug & Play
Energy and control - Dimensions (height x width x depth)
- 720 x 440 x 348 mm
Dimensions and installation - Minimum lateral distance
- 5 mm on each side
Dimensions and installation - Minimum inferior distance
- 180 mm
Dimensions and installation - Minimum front service distance
- 500 mm
Dimensions and installation - Superior distance with 60/100 outlet
- 165 or 248 mm, according to the installation plan
Dimensions and installation - Higher distance with outlet 80/80
- 220 mm
Dimensions and installation - Maximum distance with outlet 80/125
- 276 mm
Dimensions and installation - Natural gas connection pressure G20
- 20 mbar
Gas
PDF and documentation of the model
Original documents, unmodified. Refer to the installation plan and the conditions of each data point before selecting the equipment.
- ecoTEC plus VM/VMW installation manualPDF · 96 pages · VaillantView original on the manufacturer's website ↗
- ecoTEC plusPDF · 2 pages · VaillantView original on the manufacturer's website ↗
The gallery sheets are summaries of Uniclima based on these documents. The external volume diagram does not represent connections, accessories, or service distances.
Frequently asked questions: condensing boilers 8000014271
Does the ecoTEC plus VMW 26CS work for a 90 m² house?
It can be assessed whether the calculated load fits within its range of 3.0-19.8 kW at 80/60 °C. For example, 90 m² with assumed losses of 80 W/m² would require 7.2 kW; this is an illustrative calculation, not a surface approved by Vaillant. The minimum of 3 kW is also important: if the dwelling requires less, the unit may operate in cycles. Insulation, climate, ventilation, and emitters must be taken into account before choosing this power.
Does the VMW 26CS allow for two simultaneous showers?
It cannot be guaranteed solely by its power. Two showers at 8 l/min would consume 16 l/min; with an inlet temperature of 10 °C and usage at 40 °C, they require a temperature rise of 30 K. The declared specific flow rate is 12.3 l/min at ΔT 30 K. This falls short of that example of simultaneous consumption. Furthermore, the manual indicates a limiter of 8.7 l/min for domestic hot water: specific flow rate, hot water output, and mixed flow rate of the shower are not the same. It is necessary to measure the network pressure and flow rate, inlet temperature, and consumption of the showers. The limiter should not be removed or modified to achieve the advertised performance.
Does the ecoTEC plus VMW 26CS have a storage tank for showers?
It is a mixed model with micro-accumulation, not the VMI variant with accumulation. Micro-accumulation improves the initial response, but it does not provide a reserve of tens of liters to maintain multiple demands. For the VMW 26CS, its domestic hot water capacity of 25.7 kW and the flow rate under usage conditions should be evaluated. If you need a hot water reserve, a compatible storage unit or system must be explicitly selected; it should not be assumed in this boiler.
What cabinet does the Vaillant VMW 26CS need?
The body measures 720 mm in height, 440 mm in width, and 348 mm in depth. The manual also requires 5 mm on each side, 180 mm below, and 500 mm of front access. Above, it needs 165 or 248 mm with a 60/100 outlet according to the plan, 220 mm with an 80/80, or 276 mm with an 80/125. These are not the measurements of a closed cabinet fitted to the unit: access, connections, and the authorized discharge for installation must be maintained.
What differentiates the VMW 26CS from the other ecoTEC plus 26, 32, and 36?
The three occupy 720 x 440 x 348 mm. The 26 offers a maximum heating output of 19.8 kW at 80/60 °C and 12.3 l/min specific at ΔT 30 K; the 32, 24.8 kW and 15.2 l/min; the 36, 29.8 kW and 17.0 l/min. The VMW 26CS has the lowest minimum heating output of the three, 3.0 kW. Choose based on thermal demand and domestic hot water consumption, not assuming that all include the same accessories.
Do the 14.8 l/min and 12.3 l/min of the VMW 26CS contradict each other?
No: 14.8 l/min is the published flow rate with ΔT 25 K and 12.3 l/min is the specific D from the manual with ΔT 30 K according to EN 13203-1. For example, changing water from 15 °C to water at 40 °C requires 25 K, while from 10 °C to 40 °C requires 30 K. The more each liter needs to be heated, the lower the available thermal flow rate. None of these values should be confused with the limiter of 8.7 l/min or used without checking the actual temperature.
Does the price include installation and shipping?
Includes VAT and shipping to mainland Spain. Installation and adaptations are valued separately. With sensoHOME radio. Installation not included.
