TecalorTTF 66
The Tecalor TTF 66 is a heat pump with SCOP (35 °C) 4.95 and refrigerant R410A.1
Key figures
UK
Rules in the UK
Boiler Upgrade Scheme
Not eligibleFixed 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.3,4
- Must be MCS-certified (product and installer). Check the Ofgem product eligibility list.
- Rated output 67 kW; the scheme covers systems up to 45 kW.
- SCOP at 55 °C: 3.48. The installed system needs a SCOP of at least 2.8 (MCS calculation).
Technical specifications
| General | |
|---|---|
| Type (source) | Ground source1 |
| Performance | |
| Rated output 35 °C | 67 kW1 |
| Rated output 55 °C | 62 kW1 |
| Efficiency | |
| SCOP (35 °C) | 4.951 |
| SCOP (55 °C) | 3.481 |
| Seasonal efficiency ηs 35 °C | 190 %1 |
| Seasonal efficiency ηs 55 °C | 131 %1 |
| Energy label 35 °C | A, , , 1 |
| Energy label 55 °C | A, , 1 |
| Noise | |
| Indoor unit sound power | 59 dB(A)1 |
| Refrigerant | |
| Refrigerant | R410A1 |
| Refrigerant GWP | 2,0881 |
| Refrigerant charge | 14.5 kg1 |
Frequently asked questions
What is the SCOP (35 °C) of the Tecalor TTF 66?
The SCOP (35 °C) of the Tecalor TTF 66 is 4.95.1
Which refrigerant does the Tecalor TTF 66 use?
The refrigerant of the Tecalor TTF 66 is R410A.1
How much Boiler Upgrade Scheme grant can you get for the Tecalor TTF 66?
Probably none. Rated output 67 kW; the scheme covers systems up to 45 kW.1
Sources
- 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