Condensing boiler · New equipmentSaunier Duval Duomax Condens 35/90
Saunier Duval Duomax Condens 35/90 boiler
Heating and hot water for everyday use, combined in a gas boiler.
- Gas
- Natural gas Convertible to propane
- Wi-Fi
- Optional MiGo Link + control
- Heating
- 5.8-30.0 kW 80/60 °C
- Domestic hot water accumulation
- 89.1 liters Integrated tank
Gas and Wi-Fi: compatibility and accessories
Gas and conversion: Natural gas G20 supply; adaptation to propane G31 with the kit and adjustments indicated by the manufacturer. 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: The MiGo Link solution requires replacing Exacontrol E7 R with MiSet or MiPro Sense. It is not enough to simply add the module to the standard control; both accessories and the adaptation are valued separately. 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 domestic hot water reserve of 89.1 liters. 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 Duomax Condens 35/90 boiler
- Brand
- Saunier Duval
- Model
- Saunier Duval Duomax Condens 35/90 boiler
- Status
- New
- Supply scope
- With Exacontrol E7R and external sensor. Installation not included.
- Shipping
- Included in mainland Spain. Please confirm the deadline.
- Commercial reference
- 12014602
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)
- 5.8-30.0 kW
Heating - Useful power with natural gas (50/30 °C)
- 6.6-32.5 kW
Heating - Useful power with propane (80/60 °C)
- 8.5-30.0 kW
Heating - Useful power with propane (50/30 °C)
- 9.5-32.5 kW
Heating - Supply temperature range
- 30-80 °C
Heating - Maximum heating pressure
- 3 bar
Heating - Nominal heating flow rate (ΔT 20 K)
- 1.292 l/h
Heating - Nominal heating flow rate (ΔT 30 K)
- 861 l/h
Heating - Heating expansion vessel
- 15 l; separated from the domestic hot water accumulator
Heating - Useful power for domestic hot water with natural gas
- 5.8-34.0 kW
Hot water - Useful power for domestic hot water with propane
- 8.5-34.0 kW
Hot water - Domestic hot water accumulator capacity
- 89.1 l
Hot water - Continuous flow domestic hot water (ΔT 35 K)
- 837 l/h
Hot water - Specific flow rate for domestic hot water (ΔT 35 K)
- 24.6 l/min
Hot water - Specific flow rate DHW D (ΔT 30 K, EN 13203)
- 28.7 l/min
Hot water - Domestic hot water temperature range
- 35-65 °C
Hot water - Maximum domestic hot water pressure
- 10 bar
Hot water - Series control
- Exacontrol E7 R radio version
Regulation and accessories - External sensor as standard
- Wireless, with photovoltaic power supply
Regulation and accessories - Connection via application
- Optional MiGo Link; requires switching to MiSet or MiPro Sense.
Regulation and accessories - Sanitary recirculation
- Ready; set with pump or without pump as an accessory
Regulation and accessories - Primary heat exchanger
- Stainless steel
Construction and gas - Combustion control
- ELGA
Construction and gas - Declared modulation
- 1:5
Construction and gas - Supply gas
- Natural gas G20, 20 mbar
Construction and gas - Adaptation to propane
- Through a kit and authorized technical service
Construction and gas - Nominal dimensions (height x width x depth)
- 1,320 x 599 x 693 mm
Dimensions and installation - Net weight
- 111 kg
Dimensions and installation - Weight with water
- 205 kg
Dimensions and installation - Front service space
- 600 mm
Dimensions and installation - Service side space
- 20 mm; at least 300 mm on one side for maintenance
Dimensions and installation - Seasonal ErP efficiency
- 92 %
Efficiency and sound - Domestic hot water efficiency and sanitary profile
- A / XL
Efficiency and sound - Declared sound level
- 49 dB(A)
Efficiency and sound - Maximum electrical consumption
- 105 W
Electricity - Standby power consumption
- 2.1 W
Electricity - Electrical supply
- 230 V, 50 Hz
Electricity - Electrical protection
- IPX4D
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 Duomax Condens F34 90PDF · 52 pages · Saunier DuvalView original on the manufacturer's website ↗
- Duomax Condens 35/90PDF · 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 12014602
Does the Duomax 35/90 work for a 200 m² house with radiators?
If a loss of 80 W/m² is assumed, 200 m² would require 16 kW, within the 5.8-30.0 kW useful range with natural gas at 80/60 °C. This is an example, not a guaranteed surface area. A house of the same size but with poorer insulation may require more heat, and a small area may fall below the minimum and cause cycling. The professional must calculate the demand and check radiators and flow rate. The 35 in the commercial name does not mean 35 kW of heating: it is up to 30 kW at 80/60 °C and 32.5 kW at 50/30 °C.
Can it maintain two showers of 8 l/min running at the same time?
The tank helps to cover simultaneous consumption, but it does not guarantee unlimited duration. For example, with water entering at 5 °C and showers at 40 °C, the temperature difference is 35 K: the declared continuous flow rate is 837 l/h, equivalent to 13.95 l/min. Two showers at 8 l/min demand 16 l/min and also use the reserve. The 24.6 l/min specific to that same temperature difference and the 28.7 l/min at 30 K are results from different tests, not guaranteed continuous flow rates. The duration depends on the initial load, temperatures, and fixtures; it is not solely derived from the 90 liters in the name.
Does the accumulator have 90 real liters and how long does it take to recover?
The declared capacity is 89.1 liters of domestic hot water; 90 liters is the commercial designation. It is a sanitary reserve integrated with dynamic charging, different from the 15-liter tank of the heating circuit. The manufacturer declares up to 34 kW useful for domestic hot water and 837 l/h continuous at ΔT 35 K, but these values do not alone determine the minutes required to recover a completely cold tank. No recovery time is promised that has not been tested for the initial temperature, set point, and simultaneous consumption of the case.
Does it fit in a space of 60 cm wide and 70 cm deep?
A gap that tight should not be considered valid. The nominal dimensions are 1,320 x 599 x 693 mm, but the installation manual specifies 600 mm in width and 698 mm in depth; the supplied version needs to be checked. Additionally, it requires 600 mm in front and lateral access, with at least 300 mm on one side for maintenance. Space is also reserved for connections and drainage according to the plan. It is a floor-standing unit weighing 111 kg when empty and 205 kg when filled with water: check the floor, access route, and maneuverability before purchasing.
Does it include mobile control and a circulation pump for distant bathrooms?
It includes Exacontrol E7 R via radio and a wireless outdoor sensor. This does not equate to including mobile connectivity: MiGo Link is optional and requires changing the control to MiSet or MiPro Sense. It is prepared for domestic hot water recirculation, useful when studying an installation with distant bathrooms, but recirculation sets with or without a pump are listed as separate accessories. The existence of the accumulator does not create a return network nor does it eliminate waiting in a long pipe by itself.
Can I install this Duomax with a propane tank?
It is supplied for natural gas and can be adapted to propane using the corresponding kit and a qualified professional. It does not come converted and should not be modified without that intervention. With propane, the heating range at 80/60 °C changes to 8.5-30.0 kW, compared to 5.8-30.0 kW with natural gas; the minimum for domestic hot water also increases to 8.5 kW. This difference is significant in low-demand homes. Confirm fuel type, kit, and conversion service before ordering; adaptation is not included simply because it is technically possible.
Does the price include installation and shipping?
Includes VAT and shipping to mainland Spain. Installation and adaptations are valued separately. With Exacontrol E7R and external sensor. Installation not included.
