Photo: CTC
Air/water monoblocR407C
CTC EcoAir 400
Air-to-water monoblock · 5 models
Simple fixed-speed R407C air-to-water unit (models 406 to 420), often used alongside a pellet or wood boiler or to replace only the outdoor unit. Output range is the maximum output at A7/W35 from the product sheet. Not on the BAFA list.
Grant lists
Grants depend on the exact model being on the official list. The counts below are the entries of this series we found in each list.
BAFA WEP (Germany)
No model on the list
No model of this series is in the BAFA Wärmeerzeuger-Portal, so it cannot be funded under the German BEG grant.
checked November 4, 2026
ZUM (Poland)
No model on the list
No model of this series is on the Lista ZUM, so it cannot be funded under Czyste Powietrze.
checked November 4, 2026
Specifications
| Type | Air-to-water monoblock |
|---|---|
| Heating output (datasheet) | 6.2–17.6 kW |
| SCOP at 35 °C | – |
| SCOP at 55 °C | – |
| Refrigerant | R407C (GWP 1774) |
| Outdoor sound power | 56–66 dB(A) |
| Max. flow temperature | – |
Heating output is the figure in the manufacturer's datasheet; the basis (nominal output at A7/W35 or B0/W35, or design heat load) differs between brands, so check the datasheet before comparing. * = design heat load Pdesignh at 35 °C from the BAFA portal.
Control and connectivity
| SG Ready | Yes (via CTC EcoLogic M/L/XL) |
|---|---|
| Modbus | Yes (TCP, via CTC EcoLogic M/L/XL) |
| EEBUS | Not documented |
| Cloud API | open API (myUplink) |
| §14a EnWG control | not confirmed |
| Local interfaces | Modbus TCP (via CTC EcoLogic M/L/XL), SG Ready (via CTC EcoLogic M/L/XL), relay input (via CTC EcoLogic M/L/XL) |
Source: ctc-heating.com/file-download-product/6644 · ctc-heating.com/file-download-product/9805 · ctc-heating.com/file-download-product/7572
Zerofy
NativeZerofy controls CTC heat pumps natively, through the manufacturer's cloud, and moves heating and hot water into hours with surplus solar power or low prices.
Models in this series
Model codes as the manufacturer documents them. The official list entries, with their own naming, follow below.
More CTC heat pumps
Sources
- Datasheet: ctc-heating.com/file-download-product/7917
- Product page: ctc-heating.com/products/air-to-water-heat-pumps/ctc-ecoair-400
- Control and connectivity: ctc-heating.com/file-download-product/6644
- Control and connectivity: ctc-heating.com/file-download-product/9805
- Control and connectivity: ctc-heating.com/file-download-product/7572
- BAFA Wärmeerzeuger-Portal – Wärmepumpen – checked November 4, 2026
- Lista ZUM (Instytut Ochrony Środowiska) – checked November 4, 2026
- EEBUS certified devices – checked November 2, 2026
All figures are taken from the manufacturers' datasheets and the official BAFA and ZUM lists on the date shown and may have changed since. This is not grant advice – check the list and your grant conditions before you order. Zerofy is not affiliated with any of the manufacturers listed.
SG Ready is a label of the Bundesverband Wärmepumpe (BWP) e.V.; “Yes” means the manufacturer documents the two-input interface or declares it on the BAFA portal, not that the series carries the BWP label – the label list is at waermepumpe.de. EEBUS is a standard of the EEBus Initiative e.V.; Modbus is a registered trademark of Schneider Electric, licensed to the Modbus Organization. Product names, logos and photos belong to their manufacturers and are shown to identify the products. Grant data: BAFA Wärmeerzeuger-Portal and Lista ZUM (IOŚ-PIB) as of the dates shown; the SCOP at 55 °C in the BAFA tables is calculated by Zerofy from the portal's ηs value.
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