Saunier Duval ThemaFast MiConnect MA 31-CS/1-Cf boiler

Condensing boiler · New equipmentSaunier Duval ThemaFast MiConnect MA 31-CS/1-Cf

New boilerSaunier Duval Condensing boilers

Saunier Duval ThemaFast MiConnect MA 31-CS/1-Cf boiler

VAT includedIn stock

ThemaFast MiConnect MA 31-CS/1-Cf offers from 3.4 to 25.0 kW useful at 80/60 °C and from 3.9 to 27.3 kW at 50/30 °C. In domestic hot water, it delivers 17.8 l/min with an inlet at 10 °C and ΔT 25 K, and incorporates micro-accumulation of 3 l. The body measures 740 × 418 × 344 mm; MiGo Link can be added as an optional WiFi control and the adaptation to propane must be carried out by a professional. Installation not included. VAT and mainland shipping included.

Useful heating power (80/60 °C): 3.4-25.0 kW
Domestic hot water flow rate at ΔT 25 K, inlet 10 °C: 17.8 l/min
Dimensions (height × width × depth): 740 × 418 × 344 mm

Condensing boiler

The model, at a glance

Wall-mounted mixed boiler ThemaFast MiConnect MA 31-CS/1-Cf: 3.4–25.0 kW for heating, 17.8 l/min of domestic hot water at ΔT 25 K and micro-accumulation of 3 l.

Useful heating power (80/60 °C): 3.4-25.0 kW
Domestic hot water flow rate at ΔT 25 K, inlet 10 °C: 17.8 l/min
Dimensions (height × width × depth): 740 × 418 × 344 mm

Read the full description and what it includes.

The 3-liter micro-accumulation improves the initial response, but it is not a reserve for two showers. The body measures 740 × 418 × 344 mm and allows for an optional MiGo Link WiFi control. The adaptation to propane should be done by a professional.

What is included in the purchase?

Installation not included.

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

Technical sheet: Saunier Duval ThemaFast MiConnect MA 31-CS/1-Cf

Brand: Saunier Duval
Model: Saunier Duval ThemaFast MiConnect MA 31-CS/1-Cf boiler
Status: New
Supply scope: Installation not included.
Shipping: Included in mainland Spain. Please confirm the deadline.
Commercial reference: 8000014246

Specifications and dimensions of the model

Compare each magnitude under its testing conditions: heating, domestic hot water, efficiency, and dimensions.

Useful heating power, minimum-maximum at 80/60 °C: 3.4–25.0 kW
Heating
Useful heating power, minimum-maximum at 50/30 °C: 3.9–27.3 kW
Heating
Domestic hot water flow rate at ΔT 25 K, inlet 10 °C: 17.8 l/min
Hot water
Micro-accumulation DHW: 3 l
Hot water
Efficiency and DHW profile: Seasonal efficiency 94%; class A; XL profile
Efficiency and consumption
Dimensions (height × width × depth): 740 × 418 × 344 mm
Dimensions and connections
Weight: 33.8 kg
Dimensions and connections

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.

ThemaFast MiConnectPDF · 2 pages · Saunier Duval View 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

Frequently asked questions: condensing boilers 8000014246

What power does it offer for heating?

It operates from 3.4 to 25.0 kW useful at 80/60 °C and from 3.9 to 27.3 kW at 50/30 °C. The required power is determined by the thermal demand and the emitters of the installation.

Can it supply two showers at 8 l/min?

Two showers of 8 l/min require 16 l/min. The manufacturer states 17.8 l/min with an inlet temperature of 10 °C and a ΔT of 25 K; at an outlet temperature of 35 °C, this difference corresponds to 25 K. If the water exits at 40 °C, the difference is 30 K; the approximate calculation 17.8 × 25/30 gives about 14.8 l/min, which is lower than 16 l/min under those conditions. It is not a flow rate certified by the manufacturer at ΔT 30 K nor a guarantee for two showers.

What do the 3 liters of micro-accumulation provide?

The 3 liters form a small internal reserve to improve the response when opening the tap. They are not a large sanitary tank nor a reserve to maintain two simultaneous showers.

What are its dimensions?

The body measures 740 × 418 × 344 mm (height × width × depth). The final space must include connections, drainage, and service clearances.

Can I control it via WiFi?

Yes, through the compatible MiGo Link accessory, which is purchased separately.

What gas does it use?

It is prepared for natural gas and can be adapted to propane using the parameters provided by the manufacturer. The conversion and commissioning are the responsibility of a professional.

Does the price include installation and shipping?

Includes VAT and shipping to mainland Spain. Installation and adaptations are valued separately. Installation not included.