TecalorTTF 17.5
The Tecalor TTF 17.5 is a heat pump with SCOP (35 °C) 4.79 and refrigerant R452B.1,2
Key figures
UK
Rules in the UK
Boiler Upgrade Scheme
Check conditions£7,500 – £9,0003Fixed grant (England & Wales)
Fixed grant in England and Wales, deducted from your installer’s quote. £9,000 when replacing oil or LPG off the gas grid (until March 2027). Scotland: Home Energy Scotland grant instead.4,5
- Must be MCS-certified (product and installer). Check the Ofgem product eligibility list.
- Rated output 18.14 kW; the scheme covers systems up to 45 kW.
- SCOP at 55 °C: 3.7. The installed system needs a SCOP of at least 2.8 (MCS calculation).
Technical specifications
| General | |
|---|---|
| Type (source) | Ground source1 |
| Compressors | 11 |
| Capacity control | keine1 |
| Performance | |
| Rated output 35 °C | 18.14 kW1 |
| Rated output 55 °C | 19.84 kW1 |
| Efficiency | |
| SCOP (35 °C) | 4.791 |
| SCOP (55 °C) | 3.71 |
| Seasonal efficiency ηs 35 °C | 184 %1 |
| Seasonal efficiency ηs 55 °C | 140 %1 |
| Energy label 35 °C | A, , , 2 |
| Energy label 55 °C | A, , , 2 |
| Noise | |
| Indoor unit sound power | 46 dB(A)1 |
| Refrigerant | |
| Refrigerant | R452B1 |
| Refrigerant GWP | 6982 |
| Refrigerant charge | 1.25 kg1 |
| Electrical | |
| Max. power input | 7.1 kW1 |
| Connectivity & smart | |
| SG Ready | Yes1 |
Frequently asked questions
What is the SCOP (35 °C) of the Tecalor TTF 17.5?
Which refrigerant does the Tecalor TTF 17.5 use?
Sources
- List of eligible heat pumps (BEG) — Bundesamt für Wirtschaft und Ausfuhrkontrolle (BAFA) · accessed 27 Sept 2026
- Heat Pump Keymark certificates — EHPA / DIN CERTCO (Heat Pump KEYMARK) · accessed 29 Sept 2026
- Boiler Upgrade Scheme: what you can get — GOV.UK · accessed 27 Sept 2026
- Boiler Upgrade Scheme: guidance for installers (V5) — Ofgem · accessed 27 Sept 2026
- Boiler Upgrade Scheme product eligibility — Ofgem · accessed 27 Sept 2026