Condensing boiler · New equipmentSaunier Duval Isofast Condens MA 36-CF/1-CfI (n-int)
Saunier Duval Isofast Condens MA 36-CF/1-CfI boiler (n-int)
Heating and hot water for everyday use, combined in a gas boiler.
- Gas
- Natural gas Without conversion to LPG
- Wi-Fi
- Included MiGo Link
- Heating
- 3.0-25.0 kW 80/60 °C
- Domestic hot water flow rate
- 20.9 l/min ΔT 25 °C
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 ↗
Wi-Fi and supply: The MA 36-CF/1-CfI (N-INT) variant comes standard with MiSet Radio and MiGo Link. It should not be confused with the MA 35-CS or the SfI variant. The technical sheet states that the conversion to propane is not available. Source 1 ↗
Description
Saunier Duval 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 Saunier Duval Isofast Condens MA 36-CF/1-CfI (n-int)
- Brand
- Saunier Duval
- Model
- Saunier Duval Isofast Condens MA 36-CF/1-CfI boiler (n-int)
- 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.
- Useful heating output (80/60 °C, G20)
- 3.0-25.0 kW
Heating - Useful heating output (50/30 °C, G20)
- 3.2-26.5 kW
Heating - PCI efficiency (50/30 °C)
- 104 %
Heating - PCI efficiency (80/60 °C)
- 98 %
Heating - Supply temperature range
- 30-80 °C
Heating - Nominal heating flow rate (ΔT 20 K)
- 1.077 l/h
Heating - Heating expansion vessel
- 12 l
Heating - Maximum working pressure for heating
- 3 bar
Heating - Domestic hot water power
- 3.1-36.4 kW
Hot water - Domestic hot water flow rate (ΔT 25 °C, inlet 10 °C)
- 20.9 l/min
Hot water - Domestic hot water temperature range
- 35-60 °C
Hot water - Maximum allowable pressure for domestic hot water
- 10 bar
Hot water - ACS volume, MicroFast 3.0 micro-accumulation
- 3 l
Hot water - Seasonal ErP efficiency
- 94 %
Efficiency and control - Declared sound level
- 50 dB(A)
Efficiency and control - Heating efficiency with MiSet
- A
Efficiency and control - Efficiency of domestic hot water / demand profile
- A / XL
Efficiency and control - Combustion technology
- FlameFit
Efficiency and control - Modulation
- 1:12
Efficiency and control - Primary heat exchanger
- Stainless steel
Construction and gas - Supply gas
- Natural gas
Construction and gas - Propane conversion
- Not available
Construction and gas - Maximum electrical consumption
- 97 W
Electricity - Standby power consumption
- < 2 W
Electricity - Electrical protection
- IPX5D
Electricity - Dimensions (width x height x depth)
- 470 x 893 x 392 mm
Dimensions and installation - Weight
- 48 kg
Dimensions and installation - 60/100 horizontal
- 10 m + 1 elbow 87°; indicative data, consult evacuation instructions 0020294231
Flue gas evacuation - 60/100 vertical
- 9 m; indicative data, consult evacuation instructions 0020294231
Flue gas evacuation - 80/125
- 25 m + 3 elbows 87°; indicative data, consult evacuation instructions 0020294231
Flue gas evacuation - 80/80 evacuation
- 33 m + 3 elbows 87°; maximum 30 m vertically; indicative data, consult evacuation instructions 0020294231
Flue gas evacuation - 80/80 air intake
- 8 m + 1 elbow 87°; only if the intake and discharge are on opposite facades or slopes (note 2); indicative data, consult evacuation instructions 0020294231
Flue gas evacuation - Approved types
- C13, C33, C43, C53, C83, C93, B23P, B33
Flue gas evacuation - CE Certificate
- 0063DL3987
Flue gas evacuation
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 MiConnect H-Condens MA 36-CF/1-CfI (N-INT)PDF · 2 pages · Saunier DuvalView 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
Is a 36 kW boiler suitable for any home?
No. The technical sheet separates the domestic hot water output, from 3.1-36.4 kW, from the useful heating output, which reaches 25.0 kW at 80/60 °C. The commercial number cannot be converted into square meters: the installer must calculate the thermal load, check the emitters, and also verify the minimum output when only one zone is operating.
Can you keep two showers open at the same time?
It cannot be guaranteed solely with the data sheet. Two showers at 8 l/min require 16 l/min of mixed water, but the published 20.9 l/min corresponds to a ΔT of 25 °C with an inlet temperature of 10 °C. That figure alone does not guarantee two showers or a continuous flow in any installation. The comparison requires checking pressure, inlet and usage temperatures, faucets, and the actual demand of the system.
Does it have a domestic hot water storage tank or just comfort assistance?
It has 3 liters of MicroFast 3.0 micro-accumulation. It is a small reserve to improve the response and stability when opening a tap, not a large domestic hot water accumulator to sustain prolonged consumption. The 12 liters of the expansion vessel belong to the heating circuit and should not be counted as available hot water.
What space should I reserve for its installation?
The body measures 470 x 893 x 392 mm, width x height x depth. The provisional sketch on page 1 shows B=397 mm, while the dimensional table on page 2 indicates depth=392 mm; therefore, the tabulated measurement is proposed and a cabinet with a single figure is not decided. Connections, drainage, support, and maintenance access require professional verification: these dimensions do not guarantee a safe gap.
Is it compatible with propane or with another IsoFast variant?
For this N-INT column, the technical sheet indicates natural gas and propane conversion not available. Compatibility, power, or flow of the IsoFast MA 35-CS/1 (N-ES), or any other gas variant, should not be transferred without a reference and documentation that expressly cover it.
What regulation and connectivity correspond to this CfI?
The technical sheet identifies the CfI (N-INT) configuration with MiSet Radio and MiGo Link as standard; the SfI column uses MiPro Sense Radio. The difference is not interchangeable and the heating class published with MiSet is A. Zoning accessories or an external sensor are not included unless the offer specifies them.
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.
