Vaillant ecoTEC Pure VMW236/7-2 HES boiler

Condensing boiler · New equipmentVaillant ecoTEC Pure VMW236/7-2 HES

Vaillant ecoTEC Pure VMW236/7-2 HES boiler

VAT includedIn stock

The ecoTEC pure VMW 236/7-2 H-ES combines heating from 6.5 to 18.5 kW at 80/60 °C with 24 kW for domestic hot water. It delivers 11.5 l/min at ΔT 30 K and allows for the activation or deactivation of the domestic hot water preheating. Its depth of 338 mm makes it easier to study the space without confusing the body measurements with the installation area. Equipment without installation; confirm the accessories for this configuration. VAT and mainland shipping included.

Heating power (80/60 °C): 6.5-18.5 kW
Specific flow rate for domestic hot water (ΔT 30 K): 11.5 l/min
Dimensions (height x width x depth): 720 x 440 x 338 mm

Condensing boiler

The model, at a glance

Vaillant ecoTEC Pure 236: heating 6.5-18.5 kW at 80/60 °C, DHW 24.0 kW, specific flow rate 11.5 l/min at ΔT 30 K and 338 mm deep.

Heating power (80/60 °C): 6.5-18.5 kW
Specific flow rate for domestic hot water (ΔT 30 K): 11.5 l/min
Dimensions (height x width x depth): 720 x 440 x 338 mm

Read the full description and what it includes.

The Pure 236 separates two needs: heating the home and producing hot water when the tap is opened. In heating mode, it delivers from 6.5 to 18.5 kW at 80/60 °C, or from 7.2 to 20.2 kW at 50/30 °C. Its minimum output is important in small, well-insulated homes or in closed areas: a lower demand may require on and off cycles.

The domestic hot water output reaches 24.0 kW. The specific flow rate is 11.5 l/min with a temperature rise of 30 K and 9.9 l/min with 35 K. The commercial 13.8 l/min corresponds to 25 K; comparing these figures without their temperature may lead to choosing an insufficient capacity for several taps simultaneously.

The domestic hot water preheating can be deactivated. It improves service readiness, but it should not be counted as a water reserve for two bathrooms. The 8 liters of the expansion vessel belong to the heating circuit, not to a consumption water tank. The primary heat exchanger is made of stainless steel.

It measures 720 x 440 x 338 mm and weighs 30.8 kg when empty. The maximum electrical consumption is 100 W, with 1.6 W in standby, different from its thermal kW. The connection with a mobile device requires a compatible control and the corresponding internet module: integrated WiFi is not assumed, nor that these accessories are part of this offer.

What is included in the purchase?

Equipo sin instalación. Confirma los accesorios de esta configuración.

Price including VAT and shipping to mainland Spain. Installation, adaptations, and commissioning are valued separately.

Consult the manufacturer's PDFs ↓

Guide

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

Datos técnicos de Caldera Vaillant ecoTEC Pure VMW236/7-2 HES

Brand: Vaillant
Model: Vaillant ecoTEC Pure VMW236/7-2 HES boiler
Status: New
Supply scope: Equipment without installation; please confirm the accessories for this configuration.
Shipping: Included in mainland Spain. Please confirm the deadline.

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): 6.5-18.5 kW
Heating
Heating power G20 (50/30 °C): 7.2-20.2 kW
Heating
Heating load G20: 6.8-19.1 kW
Heating
Adjustable flow temperature: 30-80 °C
Heating
Maximum heating pressure: 3 bar
Heating
Nominal heating flow rate (ΔT 20 K): 797 l/h
Heating
Heating expansion vessel: 8 l
Heating
Domestic hot water power G20: 6.6-24.0 kW
Hot water
Maximum thermal load DHW G20: 24.5 kW
Hot water
Specific flow rate D (ΔT 30 K, EN 13203): 11.5 l/min
Hot water
Specific flow rate for domestic hot water (ΔT 35 K): 9.9 l/min
Hot water
Declared instantaneous flow rate for domestic hot water (ΔT 25 K): 13.8 l/min
Hot water
Minimum water flow: 1.7 l/min
Hot water
Cold water flow limiter: 12 l/min
Hot water
Adjustable domestic hot water temperature: 35-60 °C
Hot water
Allowed service pressure for domestic hot water: 0.3-10 bar
Hot water
Preparation of domestic hot water: Deactivatable preheating
Hot water
Dimensions (height x width x depth): 720 x 440 x 338 mm
Dimensions and installation
Net weight: 30.8 kg
Dimensions and installation
Minimum lateral distance: 5 mm on each side
Dimensions and installation
Minimum inferior distance: 180 mm
Dimensions and installation
Front service distance: 500 mm
Dimensions and installation
Distance greater with duct 60/100: 165 mm
Dimensions and installation
Maximum distance with duct 80/125: 275 mm
Dimensions and installation
Maximum distance with duct 80/80: 300 mm
Dimensions and installation
Gas supply pressure G20: 20 mbar
Gas and equipment
NOx emissions class: 6
Gas and equipment
Electrical supply: 230 V / 50 Hz
Electricity and acoustics
Maximum electrical consumption: 100 W
Electricity and acoustics
Standby power consumption: 1.6 W
Electricity and acoustics
Degree of protection: IPX4D
Electricity and acoustics
Interior acoustic power LWA: 49 dB(A)
Electricity and acoustics
Energy class heating / DHW and profile: A / A, XL profile
Efficiency and construction
Primary heat exchanger: Stainless steel
Efficiency and construction

Manufacturer's sources

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.

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

Frequently asked questions: condensing boilers

Does the ecoTEC Pure 236 fit in a 100 m² apartment?

It depends on the calculated load, not just the size. For example, 100 m² with assumed losses of 80 W/m² require 8 kW, within their 6.5-18.5 kW at 80/60 °C. If the same floor needed 50 W/m², it would be 5 kW, below the minimum. These are not certified surfaces: insulation, climate, ventilation, and emitters change the result. It is also advisable to check the demand when only some rooms are heated.

Can the Pure 236 maintain two showers at 8 l/min at the same time?

Two showers with that flow rate add up to 16 l/min. With an inlet temperature of 10 °C and usage at 40 °C, the temperature difference is 30 K, which exceeds the specific 11.5 l/min of the 236. The cold water limiter is 12 l/min: this is a different figure from the specific flow rate and should not be removed to force the performance. For that simultaneous demand, it is necessary to consider greater domestic hot water production or accumulation, in addition to network pressure and flow rate.

Is the 8 liters of the Pure 236 a storage tank for hot water?

No. They are the capacity of the heating expansion vessel, whose function is not to store drinking water for showers. The preparation of domestic hot water is through an activatable and deactivatable preheating; the manufacturer does not present those 8 liters as sanitary reserve. In prolonged consumption, they account for the production of 24 kW and the inlet water conditions, not adding a supposed tank volume.

What cabinet does the Pure 236 need in addition to its 338 mm depth?

The body measures 720 x 440 x 338 mm. At least 5 mm must be reserved on each side, 180 mm below, and 500 mm of front access for maintenance, which can be obtained by opening a door. It requires 165 mm above with a 60/100 flue, 275 mm with an 80/125, or 300 mm with an 80/80. The distances of the chosen duct and connections must be checked before closing the cabinet.

What do I gain by switching from Pure 236 to Pure 286?

The 286 increases the maximum heating output from 18.5 to 24.0 kW at 80/60 °C and the specific domestic hot water flow rate from 11.5 to 13.5 l/min at ΔT 30 K. It maintains the dimensions and weight, but its minimum heating output rises from 6.5 to 7.5 kW. More sanitary capacity does not always improve the adaptation to a home with low thermal demand. None reach the example of two showers at 8 l/min at that temperature difference.

Can I control the Pure 236 from my mobile or does it need accessories?

The connection requires a compatible control and an internet module; the boiler alone is not sufficient. The catalog includes VRT 50/2, sensoHOME, or sensoCOMFORT with the myVAILLANT module. The installer must check the specific configuration and compatibility. This offer does not include the content of a SET or any other commercial package, nor is the WiFi module included.

Does the price include installation and shipping?

Includes VAT and shipping to mainland Spain. Installation and adaptations are valued separately. Check the contents of the supply before purchasing.