Condensing boiler · New equipmentVaillant ecoTEC exclusive VMW 43CF/1-7 SfI
Vaillant ecoTEC exclusive VMW 43CF/1-7 SfI boiler
Heating and hot water for everyday use, combined in a gas boiler.
- Gas
- Natural gas Without conversion to LPG
- Wi-Fi
- Included myVAILLANT
- Heating
- 4.2-33.2 kW 80/60 °C
- Domestic hot water flow rate
- 20.4 l/min ΔT 30 K
Gas and Wi-Fi: compatibility and accessories
Gas and conversion: This version is documented for natural gas. Conversion to propane and compatibility with butane are not offered. Source 1 ↗ Source 2 ↗ Source 3 ↗
Wi-Fi and supply: The exact commercial sheet of ecoTEC exclusive VMW 30CF, 36CF, and 43CF indicates sensoCOMFORT radio and myVAILLANT connectivity as standard. The gas category of these Spanish versions is I2H. Source 1 ↗ Source 2 ↗ Source 3 ↗
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.
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 exclusive VMW 43CF/1-7 SfI
- Brand
- Vaillant
- Model
- Vaillant ecoTEC exclusive VMW 43CF/1-7 SfI boiler
- Status
- New
- Supply scope
- With sensoCOMFORT radio and myVaillant. Installation not included.
- Shipping
- Included in mainland Spain. Please confirm the deadline.
- Commercial reference
- 125834629
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)
- 4.2-33.2 kW
Heating - Heating power G20 (50/30 °C)
- 4.9-36.0 kW
Heating - Heating thermal load G20 (Hi)
- 4.5-34.2 kW
Heating - Adjustable flow temperature
- 30-80 °C
Heating - Maximum heating pressure
- 3 bar
Heating - Maximum power DHW G20
- 42.8 kW
Hot water - Nominal thermal load DHW G20 (Hi)
- 40.0 kW
Hot water - Specific flow rate D (ΔT 30 K, EN 13203-1)
- 20.4 l/min
Hot water - Declared domestic hot water flow rate (ΔT 25 K)
- 24.5 l/min
Hot water - Minimum starting flow rate
- 2.0 l/min
Hot water - Domestic hot water flow limiter
- 14.0 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 - Dimensions (height x width x depth)
- 720 x 440 x 450 mm
Dimensions and installation - Net weight
- 46 kg
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 - Distance greater with duct 60/100
- 165 or 248 mm, according to the installation plan
Dimensions and installation - Maximum distance with duct 80/80
- 220 mm
Dimensions and installation - Maximum distance with duct 80/125
- 276 mm
Dimensions and installation - Natural gas connection pressure G20
- 20 mbar
Gas and connections - Gas connection on the appliance
- 20 mm
Gas and connections - Air connection and exhaust in the appliance
- 80/125 mm
Gas and connections - NOx emissions class
- 6
Gas and connections - Maximum electrical consumption in heating
- 105 W
Electricity - Maximum electrical consumption in domestic hot water
- 122 W
Electricity - Nominal power supply
- 230 V / 50 Hz
Electricity - Standby power consumption
- Less than 2 W
Electricity - Degree of protection
- IPX5D
Electricity
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 exclusive VMW installation manualPDF · 88 pages · VaillantView original on the manufacturer's website ↗
- ecoTEC exclusive technical sheetPDF · 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 125834629
Is the exclusive 43CF the best option for any 200 m² house?
Not necessarily. In an example of 200 m² with assumed losses of 80 W/m², the load would be 16 kW; it is not a surface limit set by the manufacturer. The 43CF operates between 4.2 and 33.2 kW at 80/60 °C, so it is important to cover cold days as well as adapt to low demands. A well-insulated house may require less heating power even if it has many bathrooms. The domestic hot water demand and the thermal load should be sized separately.
Can the 43CF supply two or three showers simultaneously?
With showers of 8 l/min, two require 16 l/min and three require 24 l/min. If the water enters at 10 °C and is used at 40 °C, the temperature rise is 30 K: their 20.4 l/min specific flow exceeds the first example, but not the second. It is not a guarantee of two actual showers: pressure, temperature, other taps, and mixing are factors. The limiter of 14.0 l/min is a different data point and should not be modified in an attempt to reach an advertised flow rate.
Does it have a tank to supply three bathrooms or just micro-accumulation?
The 43CF belongs to the mixed range with micro-accumulation. The commercial recommendation from three bathrooms, a toilet, and a kitchen does not indicate that it includes a large tank or that all can consume at the same time. There are no integrated domestic hot water reserve liters specified in this documentation. For sustained consumption, it has a production of 42.8 kW and the available flow rate; a project with accumulation requires selecting and sizing that solution explicitly.
Does the 43CF fit in the same cabinet as the exclusive 36CF?
The 43CF has a depth of 450 mm compared to 382 mm of the 36CF: it requires an additional 68 mm just for the body. Both measure 720 x 440 mm in height and width. It is necessary to reserve 5 mm on the sides, 180 mm below, and 500 mm for front access. With its air intake and exhaust connection of 80/125, the manual indicates 276 mm above. The connections and the exhaust system must be checked, not adapted solely based on the similarity of the front.
What changes in heating and installation between the 36CF and the 43CF?
The 43CF increases the maximum heating output from 25.0 to 33.2 kW at 80/60 °C, but it also raises the minimum from 3.0 to 4.2 kW. It changes from 41 to 46 kg, from 382 to 450 mm in depth, from a gas connection of 15 to 20 mm, and from a flue of 60/100 to 80/125 mm. The specific flow rate of domestic hot water rises from 17.4 to 20.4 l/min at ΔT 30 K. These are changes that require reviewing demand, support, and connections.
What is the electrical consumption of the exclusive 43CF compared to the 36CF?
The declared maximum for the 43CF is 105 W in heating and 122 W in domestic hot water, compared to 61 and 113 W for the 36CF. Both indicate less than 2 W in standby. These are not permanent consumptions nor gas expenses: they depend on the mode and operating time. The estimated energy data displayed by the unit should not be used as a bill or as a substitute for the meter reading.
Does the price include installation and shipping?
Includes VAT and shipping to mainland Spain. Installation and adaptations are valued separately. With sensoCOMFORT radio and myVaillant. Installation not included.
