Saunier Duval IsoFast MiConnect MA 35-CS/1-Cf boiler

Condensing boiler · New equipmentSaunier Duval IsoFast MiConnect MA 35-CS/1-Cf

New boilerSaunier Duval Condensing boilers

Saunier Duval IsoFast MiConnect MA 35-CS/1-Cf boiler

VAT includedIn stock

IsoFast MiConnect MA 35-CS/1-Cf offers from 4.0 to 30.0 kW useful at 80/60 °C and from 4.3 to 32.5 kW at 50/30 °C. In domestic hot water, it delivers 19.9 l/min with an inlet at 10 °C and ΔT 25 K, and incorporates micro-accumulation of 3 l. The body measures 893 × 470 × 392 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 shipping to the mainland included.

Useful heating output (80/60 °C, G20): 4.0–30.0 kW
Domestic hot water flow rate at ΔT 25 K, inlet 10 °C: 19.9 l/min
Dimensions (height × width × depth): 893 × 470 × 392 mm

Condensing boiler

The model, at a glance

Caldera mural mixta IsoFast MiConnect MA 35-CS/1-Cf: 4,0–30,0 kW para calefacción, 19,9 l/min de ACS a ΔT 25 K y microacumulación de 3 l.

Useful heating output (80/60 °C, G20): 4.0–30.0 kW
Domestic hot water flow rate at ΔT 25 K, inlet 10 °C: 19.9 l/min
Dimensions (height × width × depth): 893 × 470 × 392 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 893 × 470 × 392 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

Datos técnicos de Caldera Saunier Duval IsoFast MiConnect MA 35-CS/1-Cf

Brand: Saunier Duval
Model: Saunier Duval IsoFast MiConnect MA 35-CS/1-Cf boiler
Status: New
Supply scope: Installation not included.
Shipping: Included in mainland Spain. Please confirm the deadline.
Commercial reference: 125225229

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 (G20): 4.0–30.0 kW
Heating
Useful heating power, minimum-maximum at 50/30 °C (G20): 4.3–32.5 kW
Heating
Nominal power for domestic hot water: 34.8 kW
Hot water
Domestic hot water flow rate at ΔT 25 K, inlet 10 °C: 19.9 l/min
Hot water
Micro-accumulation DHW: 3 l
Hot water
Seasonal heating efficiency: 94 %; class A; DHW profile XL
Efficiency and consumption
Dimensions (height × width × depth): 893 × 470 × 392 mm
Dimensions and connections
Fuel: Natural gas; professional conversion to propane G31
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.

IsoFast MiConnectPDF · 2 páginas · 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: calderas de condensación 125225229

What power does it offer for heating?

It operates from 4.0 to 30.0 kW useful at 80/60 °C and from 4.3 to 32.5 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 19.9 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 indicative calculation 19.9 × 25/30 gives about 16.6 l/min. It could thermally cover that consumption under those conditions, but pressure, the network, and control also matter: it is not a certified flow rate 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 893 × 470 × 392 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.