Condensing boiler · New equipmentSaunier Duval Isomax Condens T35-CS/1-Cf (n-es)
Saunier Duval Isomax Condens T35-CS/1-Cf boiler (n-es)
Heating and hot water for everyday use, combined in a gas boiler.
- Gas
- Natural gas Convertible to propane
- Wi-Fi
- Optional MiGo Link
- Heating
- 4.0-30.0 kW 80/60 °C
- Domestic hot water accumulation
- 42 liters IsoDyn 3
Gas and Wi-Fi: compatibility and accessories
Gas and conversion: It accepts natural gas G20 and conversion to propane G31 through the manufacturer's adjustment procedure. Compatibility with butane G30 is not offered without explicit documentation for this version. The conversion and commissioning are the responsibility of a qualified professional; they are not included in the purchase. Source 1 ↗ Source 2 ↗
Wi-Fi and supply: Optional MiGo Link solution for control from the app. It is purchased separately; the wired or radio controls of the set do not imply that the connection module is included. Source 1 ↗ Source 2 ↗
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.
This version includes a 42-liter domestic hot water storage tank. The tank also takes up space, so it is advisable to consider the complete set and the water consumption of the household.
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 Isomax Condens T35-CS/1-Cf boiler (n-es)
- Brand
- Saunier Duval
- Model
- Saunier Duval Isomax Condens T35-CS/1-Cf boiler (n-es)
- 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 power with natural gas (80/60 °C)
- 4.0-30.0 kW
Heating - Useful power with natural gas (50/30 °C)
- 4.3-32.5 kW
Heating - Useful power with propane (80/60 °C)
- 8.0-30.0 kW
Heating - Useful power with propane (50/30 °C)
- 8.7-32.5 kW
Heating - Supply temperature adjustment
- 15-80 °C; factory setting 75 °C
Heating - Maximum heating pressure
- 3 bar
Heating - Nominal heating flow rate (ΔT 20 K)
- 1.292 l/h
Heating - Heating expansion vessel
- 12 l
Heating - Nominal power for domestic hot water
- 34.8 kW
Hot water - Specific flow rate D (ΔT 30 K, EN 13203-1)
- 23 l/min
Hot water - Flow limiter of the appliance
- 16 l/min
Hot water - Domestic hot water accumulator capacity
- 42 l
Hot water - Permitted service pressure
- 0.3-10 bar
Hot water - Required connection pressure
- 0.7 bar
Hot water - Domestic hot water temperature range
- 45-65 °C
Hot water - Sanitary expansion vessel
- 2 l; separated from the accumulator
Hot water - Accumulation system
- IsoDyn 3 with Smart Tank Loading
Regulation - Smart eco mode
- Adapt the comfort and savings phases to usage habits.
Regulation - Manufacturer Cf configuration
- MiSet Radio; different from Sf with MiPro Sense Radio
Regulation - Mobile connectivity
- MiGo Link optional
Regulation - Supply gas
- Natural gas
Construction and gas - Adaptation to propane
- Through parameters and professional commissioning
Construction and gas - Primary heat exchanger
- Stainless steel
Construction and gas - Combustion control
- FlameFit
Construction and gas - Declared modulation
- 1:9; do not transfer the minimum from G20 to G31.
Construction and gas - Dimensions (height x width x depth)
- 893 x 470 x 582 mm
Dimensions and installation - Weight without packaging or water
- 65 kg
Dimensions and installation - Operating weight
- 114 kg
Dimensions and installation - Distance greater with duct 60/100
- 248 mm
Dimensions and installation - Minimum inferior distance
- 160 mm
Dimensions and installation - Minimum lateral distance
- 50 mm on each side
Dimensions and installation - Minimum front distance
- 500 mm
Dimensions and installation - Seasonal ErP efficiency
- 94 %
Efficiency and sound - Domestic hot water efficiency and sanitary profile
- A / XL
Efficiency and sound - Declared sound level
- 47 dB(A)
Efficiency and sound - NOx class
- 6
Efficiency and sound - Maximum electrical consumption in heating
- 146 W
Electricity - Maximum electrical consumption in domestic hot water
- 173 W
Electricity - Standby power consumption
- Less than 2 W
Electricity - Electrical supply
- 230 V, 50 Hz
Electricity - Electrical 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.
- Technical data and installation manual IsoMax Condens T35-CS/1PDF · 72 pages · Saunier DuvalView original on the manufacturer's website ↗
- IsoMax MiConnect T35-CS/1-Cf and SfPDF · 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
Does the IsoMax T35 work for a 200 m² house with multiple zones?
If a loss of 80 W/m² is assumed, a house of 200 m² would require 16 kW, within the 4.0-30.0 kW useful range with natural gas at 80/60 °C. This is a calculation example, not a guaranteed surface area. Emitters and flow rates need to be sized, and the demand for each area should be reviewed: a small room may require less than the minimum 4 kW and cause cycling. The 35 in the name does not equate to 35 kW of heating. For zoning, the manufacturer recommends studying MiPro Sense Radio with the corresponding accessories, without attributing that regulation to the Cf variant.
Can it provide hot water to two showers at 8 l/min at the same time?
The 42-liter reserve allows for handling peak consumption, but it does not guarantee two showers for an unlimited time. Two showers at 8 l/min require 16 l/min of mixed water. The manual states 23 l/min specific at ΔT 30 K and a limiter of 16 l/min in the unit: these are not the same magnitude and do not prove a continuous flow. The technical sheet also offers 27.8 l/min with an inlet at 10 °C and ΔT 25 K, a different test. To assess actual usage, it is necessary to check the inlet temperature and pressure, setpoint, faucets, and reserve load. Shower minutes cannot be deduced by simply multiplying the volume of the tank.
Does it require an external tank and how does it adapt to the house's schedule?
Integrates 42 liters of domestic hot water storage IsoDyn 3 into the wall-mounted unit itself. There is no need to add an external tank to have that reserve. The Smart eco mode uses daily habits to prioritize comfort in some phases and savings in others; an unexpected consumption does not have to find the same reserve available as a usual one. The accumulator should not be confused with the expansion vessels of 12 liters in heating and 2 liters in domestic hot water. It also does not eliminate by itself the cold water that remains in the pipes until a distant bathroom.
Does it fit in a 60 cm kitchen cabinet and can it support a lightweight wall?
The body measures 893 x 470 x 582 mm, but these dimensions do not include the service space. The manual requires 50 mm on each side, 160 mm below, and 500 mm in front; above, 248 mm with a 60/100 duct, or the distance corresponding to the chosen system. A nominal module of 60 cm may lose space due to its panels, door, and connections. Additionally, it goes from 65 kg without water to 114 kg in operation: the wall capacity and anchors must be checked with a professional, not just decided based on the width of the furniture.
Does it work with propane and maintain the same minimum power?
It allows adaptation to propane through the specified parameters and a startup by qualified personnel; this is not an operation to be performed following the commercial sheet. With G31, the heating at 80/60 °C operates between 8.0 and 30.0 kW, compared to 4.0-30.0 kW with natural gas. At 50/30 °C, the minimum increases from 4.3 to 8.7 kW. This difference is significant in a well-insulated home or when only a small area is being heated. The same minimum or a modulation promise based on natural gas should not be applied to propane.
Does the Cf version include the same control as the Sf and is it operated via Wi-Fi?
They are different configurations: the manufacturer's technical sheet associates Cf with MiSet Radio and Sf with MiPro Sense Radio. Radio describes the communication of the control, not an Internet connection. MiGo Link is listed as an optional solution for mobile management. The A+ label depends on the combination of regulation and the specified external sensor, and is not unconditionally attributed to the device. Before contracting, the supply must identify control, sensor, connectivity, and included accessories; the name of the range does not alone certify a specific kit.
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.
