Condensing boiler · New equipmentSaunier Duval Thema Condens 25-A
Saunier Duval Thema Condens 25-A 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
- 4.9-24.2 kW 80/60 °C
- Domestic hot water flow rate
- 12.2 l/min ΔT 30 K
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: Optional MiGo Link solution with compatible regulation. The reference without control does not automatically include the thermostat or the module. The installation manual prescribes a conversion kit to propane; it must be validated by the technical service. 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.
Domestic hot water is prepared when you turn on the tap, without an integrated storage tank. It is important to check how many water points you will use at the same time and the available space to replace the boiler.
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 sheet: Saunier Duval Thema Condens 25-A
- Brand
- Saunier Duval
- Model
- Saunier Duval Thema Condens 25-A boiler
- Status
- New
- Supply scope
- Reference 12021496, version H-ES without additional control. Without installation.
- Shipping
- Included in mainland Spain. Please confirm the deadline.
- Commercial reference
- 12021496
Specifications and dimensions of the model
Compare each magnitude under its testing conditions: heating, domestic hot water, efficiency, and dimensions.
- Useful heating power (80/60 °C)
- 4.9-24.2 kW
Heating - Useful heating power (50/30 °C)
- 5.4-26.1 kW
Heating - Maximum heating power factory set
- 15 kW
Heating - Supply temperature range
- 10-80 °C
Heating - Maximum heating pressure
- 3 bar
Heating - Flow rate at maximum factory power (ΔT 20 K)
- 646 l/h
Heating - Available pressure at factory power (ΔT 20 K)
- 44.2 kPa
Heating - Heating expansion vessel
- 8 l; it is not a sanitary tank.
Heating - Useful power of domestic hot water
- 5.1-25.5 kW
Hot water - Specific flow rate DHW D (ΔT 30 K, EN 13203)
- 12.2 l/min
Hot water - Domestic hot water flow rate (ΔT 25 K, inlet 10 °C)
- 14.6 l/min
Hot water - Minimum water flow
- 1.5 l/min
Hot water - Maximum domestic hot water pressure
- 10 bar
Hot water - Preparation of hot water
- Warm Start
Hot water - Gas for reference H-ES
- Natural gas G20, 20 mbar
Gas and construction - Gas category
- II2H3P
Gas and construction - Adaptation to propane
- G31, 37 mbar; conversion by a qualified professional
Gas and construction - Primary heat exchanger
- Stainless steel
Gas and construction - Declared modulation ratio
- 1:5
Gas and construction - Control of reference 12021496
- Without control; regulation packs with other codes
Regulation - Connection via application
- Optional MiGo Link with compatible configuration
Regulation - Dimensions (height x width x depth)
- 740 x 418 x 344 mm
Dimensions and installation - Net weight
- 37.1 kg
Dimensions and installation - Weight with water
- 41.6 kg
Dimensions and installation - Minimum superior distance
- 300 mm
Dimensions and installation - Minimum lower distance
- 300 mm
Dimensions and installation - Minimum distance on each side
- 10 mm
Dimensions and installation - Minimum front distance
- 600 mm
Dimensions and installation - Seasonal ErP efficiency
- 94 %
Efficiency and sound - Heating class with regulation
- A with MiSet; A+ with MiPro Sense or external sensor and MiSet
Efficiency and sound - Domestic hot water efficiency and sanitary profile
- A / XL
Efficiency and sound - Declared sound level
- 50 dB(A)
Efficiency and sound - Electrical supply
- 230 V, 50 Hz
Electricity - Maximum electrical consumption
- 107 W
Electricity - Standby power consumption
- 2.7 W
Electricity - Current intensity
- 0.47 A
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 Thema CondensPDF · 44 pages · Saunier DuvalView original on the manufacturer's website ↗
- Thema Condens 25-APDF · 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 12021496
Is the Thema Condens 25-A suitable for a 120 m² home?
With a supposed loss of 80 W/m², a 120 m² house would need 9.6 kW: a load within the 4.9-24.2 kW useful range at 80/60 °C of this boiler. This is a calculation example, not a guaranteed area. The minimum also matters: a zone that only requires 4 kW falls below and can cause cycling. The factory maximum power is set at 15 kW; the installer must check losses, emitters, and adjustments, without confusing that configuration with the maximum available.
Can it provide hot water to two showers at 8 l/min at the same time?
Two showers of 8 l/min require 16 l/min. To raise the water from 10 to 40 °C, the temperature difference is 30 K, and the declared specific flow rate is 12.2 l/min, which is below that demand. The 14.6 l/min corresponds to a lower temperature difference of 25 K. Therefore, simultaneous use of those two showers cannot be guaranteed. It is necessary to check the inlet temperature, pressure, and consumption of the mixers; for a sustained higher demand, it is advisable to compare solutions with greater domestic hot water capacity or storage.
Does Warm Start mean that it has a storage tank for multiple showers?
No. Warm Start prepares the domestic hot water production to reduce waiting time, but it does not provide a reserve tank to cover two showers. This mixed version uses a plate heat exchanger; its 8-liter vessel is for heating and does not supply water to the taps. It is also not a Thema Condens AS: the AS are variants for heating only and are studied with external accumulation. The mention of a storage tank in the documentation of the family does not make this model 25-A a unit with an included tank.
Does it fit in the same cabinet as a boiler with a depth of 30 cm?
Not due to the dimensions of the unit: the Thema Condens 25-A has a depth of 344 mm, in addition to a height of 740 mm and a width of 418 mm. The installation requires at least 10 mm on each side, 300 mm above and below, and 600 mm in front according to the plan. It is not enough to check the space of the casing; the connections, the drainage, and access must also be available. The support is verified for 41.6 kg with water, not just for the 37.1 kg net.
Does this reference work for propane or only for natural gas?
The offer 12021496 corresponds to H-ES for natural gas. This family does allow conversion to propane G31 through the intervention of a qualified professional, with the checks and markings required by the manufacturer. It does not come converted due to its acceptance, nor should it be manipulated by the user. The manual also distinguishes a P-ES item for liquefied gas that is different. For a home with propane, confirm the variant and adaptation before purchasing; that service is not included in the offer.
Does it include MiSet thermostat and heating control from the mobile?
Reference 12021496 is without control. The set with wired MiSet uses 8000013739 and the one with radio MiSet uses 8000014383; they are not the same supply. The connection via MiGo Link is optional and requires compatible configuration. The A+ class of the system depends on the indicated regulation, it is not obtained by making the device smart. Compare the complete reference and the included accessories, especially against a Thema MiConnect from another generation.
Does the price include installation and shipping?
Includes VAT and shipping to mainland Spain. Installation and adaptations are valued separately. Reference 12021496, version H-ES without additional control. Without installation.
