What's a true "Zero Disrupt / Express" heat pump installation? A HYBRID install: boiler + heat pump. Minimal disruption, no performance worries, and 80% less gas. Add it to the scheme💙 @betatalk.bsky.social @janrosenow.bsky.social @chiefgeekad.bsky.social @octopus.energy @edfenergy.com

To make the switch to clean energy easier, we should aim for lower electricity prices, not higher ones. Lower electricity prices would encourage more people to use heat pumps 💚

Cost, Energy and Comfort Comparison [17 Days | 26 Dec 25 to 11 Jan 26] Boiler (Tracker) was cheaper by £25.93 (26.7 %) vs Heat Pump (Agile), or £20.85 after offsetting £5.08 gas stand. charge (17 d × £0.299)🥇🎉 Prices based on @octopus.energy tariffs 💚

Cost, Energy and Comfort Comparison [10 Days | 1 Jan 26 to 10 Jan 26] Boiler (Tracker) was cheaper by £16.80 (27.1 %) vs Heat Pump (Agile), or £13.81 after offsetting £2.99 gas stand. charge (10 d × £0.299)🥇🎉 Prices based on @octopus.energy tariffs 💚

Cost, Energy and Comfort Comparison [16 Days | 25 Dec 25 to 9 Jan 26] Boiler (Tracker) was cheaper by £25.96 (28.0 %) vs Heat Pump (Agile), or £21.18 after offsetting £4.78 gas stand. charge (16 d × £0.299)🥇🎉 Prices based on @octopus.energy tariffs 💚

Cost, Energy and Comfort Comparison [15 Days | 25 Dec 25 to 8 Jan 26] Boiler (Tracker) was cheaper by £24.32 (28.0 %) vs Heat Pump (Agile), or £19.84 after offsetting £4.48 gas stand. charge (15 d × £0.299)🥇🎉 Prices based on @octopus.energy tariffs 💚

These are top 7 (last 30 days) ASHP heat pumps (CH + DHW) that report room temperature - last 24 hours view

Cost, Energy and Comfort Comparison [14 Days | 25 Dec 25 to 7 Jan 26] Boiler (Tracker) was cheaper by £21.98 (27.5 %) vs Heat Pump (Agile), or £17.79 after offsetting £4.18 gas stand. charge (14 d × £0.299)🥇🎉 Prices based on @octopus.energy tariffs 💚

14/ Add-on: the “spark gap” is shouting gas right now, but it is not fixed bsky.app/profile/show...

1/ Thread: I built a grid to answer one question: when does a heat pump beat a gas condensing boiler on running cost, once you include tariffs and standing charges? bsky.app/profile/show...

Cost, Energy and Comfort Comparison [13 Days | 25 Dec 25 to 6 Jan 26] Boiler (Tracker) was cheaper by £20.96 (27.9 %) vs Heat Pump (Agile), or £17.08 after offsetting £3.88 gas stand. charge (13 d × £0.299)🥇🎉 Prices based on @octopus.energy tariffs 💚

Cost, Energy and Comfort Comparison [12 Days | 25 Dec 25 to 5 Jan 26] Boiler (Tracker) was cheaper by £18.62 (27.6 %) vs Heat Pump (Agile), or £15.04 after offsetting £3.58 gas stand. charge (12 d × £0.299)🥇🎉 Prices based on @octopus.energy tariffs 💚

-5°C outside temperature MWT = (33.5 + 27.6) / 2 = 30.55°C Condensing gas boiler running cooler than most heat pumps (and cheaper)🙃💚 @janrosenow.bsky.social @openenergymon.bsky.social

Cost, Energy and Comfort Comparison [11 Days | 25 Dec 25 to 4 Jan 26] Boiler (Tracker) was cheaper by £14.70 (25.3 %) vs Heat Pump (Agile), or £11.42 after offsetting £3.28 gas stand. charge (11 d × £0.299)🥇🎉 Prices based on @octopus.energy tariffs 💚

System stability: impeccable. Then Yorkshire Tea brew cycle hits, and the chart spikes harder than a Yorkshireman's opinion on weak tea 🙃💚 bsky.app/profile/show...

Cost, Energy and Comfort Comparison [10 Days | 25 Dec 25 to 3 Jan 26] Boiler (Tracker) was cheaper by £13.09 (25.6 %) vs Heat Pump (Agile), or £10.10 after offsetting £2.99 gas stand. charge (10 d × £0.299)🥇🎉 Prices based on @octopus.energy tariffs 💚

Cost, Energy and Comfort Comparison [31 Days | 1 Dec 25 to 31 Dec 25] Boiler (Tracker) was cheaper by £18.67 (16.8 %) vs Heat Pump (Agile), or £9.41 after offsetting £9.26 gas stand. charge (31 d × £0.299)🥇🎉 Prices based on @octopus.energy tariffs 💚

Cost, Energy and Comfort Comparison [92 Days | 1 Oct 25 to 31 Dec 25] Boiler (Tracker) was cheaper by £28.45 (11.6 %) vs Heat Pump (Agile), or £0.98 after offsetting £27.47 gas stand. charge (92 d × £0.299)🥇🎉 Prices based on @octopus.energy tariffs 💚

Cost, Energy and Comfort Comparison [365 Days | 1 Jan 25 to 31 Dec 25] Boiler (Tracker) was cheaper by £102.74 (12.0 %) vs Heat Pump (Agile), or £-3.04 after offsetting £105.79 gas stand. charge (365 d × £0.290)🥇🎉 Prices based on @octopus.energy tariffs 💚

Cost, Energy and Comfort Comparison [9 Days | 22 Dec 25 to 30 Dec 25] Boiler (Tracker) was cheaper by £10.42 (26.0 %) vs Heat Pump (Agile), or £7.73 after offsetting £2.69 gas stand. charge (9 d × £0.299)🥇🎉 Prices based on @octopus.energy tariffs 💚

Cost, Energy and Comfort Comparison [8 Days | 22 Dec 25 to 29 Dec 25] Boiler (Tracker) was cheaper by £8.95 (25.8 %) vs Heat Pump (Agile), or £6.56 after offsetting £2.39 gas stand. charge (8 d × £0.299)🥇🎉 Prices based on @octopus.energy tariffs 💚

Cost, Energy and Comfort Comparison [7 Days | 22 Dec 25 to 28 Dec 25] Boiler (Tracker) was cheaper by £7.25 (24.4 %) vs Heat Pump (Agile), or £5.16 after offsetting £2.09 gas stand. charge (7 d × £0.299)🥇🎉 Prices based on @octopus.energy tariffs 💚

Cost, Energy and Comfort Comparison [31 Days | 1 Dec 24 to 31 Dec 24] Heat Pump (Cosy) was cheaper by £1.91 (1.7 %) vs Boiler (Tracker), or £10.43 after offsetting £8.52 gas stand. charge (31 d × £0.275)🥇🎉 Prices based on @octopus.energy tariffs 💚

Cost, Energy and Comfort Comparison [6 Days | 21 Dec 25 to 26 Dec 25] Boiler (Tracker) was cheaper by £5.37 (22.5 %) vs Heat Pump (Agile), or £3.57 after offsetting £1.79 gas stand. charge (6 d × £0.299)🥇🎉 Prices based on @octopus.energy tariffs 💚

Cost, Energy and Comfort Comparison [5 Days | 21 Dec 25 to 25 Dec 25] Boiler (Tracker) was cheaper by £3.96 (21.5 %) vs Heat Pump (Agile), or £2.46 after offsetting £1.49 gas stand. charge (5 d × £0.299)🥇🎉 Prices based on @octopus.energy tariffs 💚

You tuned every cycle with grace- Three per hour, the sweet steady pace. From SAT's clever brain To the boilers' warm gain, You proved balance is power, not chase. Merry Christmas 🎄🤶 💚

Cost, Energy and Comfort Comparison [4 Days | 21 Dec 25 to 24 Dec 25] Boiler (Tracker) was cheaper by £2.56 (19.0 %) vs Heat Pump (Agile), or £1.36 after offsetting £1.19 gas stand. charge (4 d × £0.299)🥇🎉 Prices based on @octopus.energy tariffs 💚

Cost, Energy and Comfort Comparison [3 Days | 21 Dec 25 to 23 Dec 25] Boiler (Tracker) was cheaper by £1.55 (16.8 %) vs Heat Pump (Agile), or £0.65 after offsetting £0.90 gas stand. charge (3 d × £0.299)🥇🎉 Prices based on @octopus.energy tariffs 💚

Cost, Energy and Comfort Comparison [365 Days | 22 Dec 24 to 21 Dec 25] Boiler (Tracker) was cheaper by £92.94 (10.9 %) vs Heat Pump (Agile), or £-12.61 after offsetting £105.55 gas stand. charge (365 d × £0.289)🥇🎉 Prices based on @octopus.energy tariffs 💚

Cost, Energy and Comfort Comparison [180 Days | 24 Jun 25 to 20 Dec 25] Boiler (Tracker) was cheaper by £24.72 (9.3 %) vs Heat Pump (Agile), or £-29.03 after offsetting £53.75 gas stand. charge (180 d × £0.299)🥇🎉 Prices based on @octopus.energy tariffs 💚

Fun fact: heating season starts when the heating has to keep coming on during the day to hold the room within ±0.5°C of the thermostat target, and the sun is no longer pushing the temperature noticeably above the target. This year 13-14 October 👇☀️❄️🇬🇧☺️💚 @nicksweathereye.bsky.social @metoffice.gov.uk

Heat Loss (Weather Comp) + PID (Room Influence) + PWM (Duty Cycle Duration / Load Comp) = Perfect Thermostat Control. Thanks SAT Team 💚 - github.com/Alexwijn/SAT gasboiler.grafana.net/public-dashb... @grafana.bsky.social @influxdb.com

Cost, Energy and Comfort Comparison [90 Days | 21 Sep 25 to 19 Dec 25] Boiler (Tracker) was cheaper by £17.59 (8.6 %) vs Heat Pump (Agile), or £-9.29 after offsetting £26.88 gas stand. charge (90 d × £0.299)🥇🎉 Prices based on @octopus.energy tariffs 💚

Cost, Energy and Comfort Comparison [30 Days | 19 Nov 25 to 18 Dec 25] Boiler (Tracker) was cheaper by £13.48 (12.6 %) vs Heat Pump (Agile), or £4.52 after offsetting £8.96 gas stand. charge (30 d × £0.299)🥇🎉 Prices based on @octopus.energy tariffs 💚

Cost, Energy and Comfort Comparison [20 Days | 28 Nov 25 to 17 Dec 25] Boiler (Tracker) was cheaper by £5.12 (8.5 %) vs Heat Pump (Agile), or £-0.86 after offsetting £5.97 gas stand. charge (20 d × £0.299)🥇🎉 Prices based on @octopus.energy tariffs 💚

Cost, Energy and Comfort Comparison [19 Days | 28 Nov 25 to 16 Dec 25] Boiler (Tracker) was cheaper by £5.34 (9.4 %) vs Heat Pump (Agile), or £-0.34 after offsetting £5.67 gas stand. charge (19 d × £0.299)🥇🎉 Prices based on @octopus.energy tariffs 💚

Cost, Energy and Comfort Comparison [18 Days | 28 Nov 25 to 15 Dec 25] Boiler (Tracker) was cheaper by £4.58 (8.6 %) vs Heat Pump (Agile), or £-0.80 after offsetting £5.38 gas stand. charge (18 d × £0.299)🥇🎉 Prices based on @octopus.energy tariffs 💚

This experimental thermostat controller is NOT based on a heating curve, but heat loss (W) + PID (W) + PWM (duty cycle duration = load compensation), constrained by the boiler’s min/max heat output (W) 💚 gasboiler.grafana.net/public-dashb...

Cost, Energy and Comfort Comparison [17 Days | 28 Nov 25 to 14 Dec 25] Boiler (Tracker) was cheaper by £4.69 (9.2 %) vs Heat Pump (Agile), or £-0.38 after offsetting £5.08 gas stand. charge (17 d × £0.299)🥇🎉 Prices based on @octopus.energy tariffs 💚

Cost, Energy and Comfort Comparison [16 Days | 28 Nov 25 to 13 Dec 25] Boiler (Tracker) was cheaper by £5.43 (11.1 %) vs Heat Pump (Agile), or £0.65 after offsetting £4.78 gas stand. charge (16 d × £0.299)🥇🎉 Prices based on @octopus.energy tariffs 💚

Cost, Energy and Comfort Comparison [15 Days | 28 Nov 25 to 12 Dec 25] Boiler (Tracker) was cheaper by £4.48 (10.0 %) vs Heat Pump (Agile), or £0.00 after offsetting £4.48 gas stand. charge (15 d × £0.299)🥇🎉 Prices based on @octopus.energy tariffs 💚

Cost, Energy and Comfort Comparison [14 Days | 28 Nov 25 to 11 Dec 25] Boiler (Tracker) was cheaper by £3.76 (9.0 %) vs Heat Pump (Agile), or £-0.42 after offsetting £4.18 gas stand. charge (14 d × £0.299)🥇🎉 Prices based on @octopus.energy tariffs 💚

Cost, Energy and Comfort Comparison [13 Days | 28 Nov 25 to 10 Dec 25] Boiler (Tracker) was cheaper by £3.99 (10.1 %) vs Heat Pump (Agile), or £0.10 after offsetting £3.88 gas stand. charge (13 d × £0.299)🥇🎉 Prices based on @octopus.energy tariffs 💚

Cost, Energy and Comfort Comparison [12 Days | 28 Nov 25 to 9 Dec 25] Boiler (Tracker) was cheaper by £3.95 (10.6 %) vs Heat Pump (Agile), or £0.36 after offsetting £3.58 gas stand. charge (12 d × £0.299)🥇🎉 Prices based on @octopus.energy tariffs 💚

Cost, Energy and Comfort Comparison [11 Days | 28 Nov 25 to 8 Dec 25] Boiler (Tracker) was cheaper by £3.83 (10.9 %) vs Heat Pump (Agile), or £0.54 after offsetting £3.28 gas stand. charge (11 d × £0.299)🥇🎉 Prices based on @octopus.energy tariffs 💚

We need to improve our thermostats. Weather compensation is a good start, keeps room temperature within ±0.4°C. But, we can achieve ±0.1°C if we add load + adaptive (PID) compensation. More comfort and less energy used 💚 bsky.app/profile/show...

Cost, Energy and Comfort Comparison [10 Days | 28 Nov 25 to 7 Dec 25] Boiler (Tracker) was cheaper by £4.27 (12.8 %) vs Heat Pump (Agile), or £1.28 after offsetting £2.99 gas stand. charge (10 d × £0.299)🥇🎉 Prices based on @octopus.energy tariffs 💚

Cost, Energy and Comfort Comparison [30 Days | 1 Nov 25 to 30 Nov 25] Boiler (Tracker) was cheaper by £9.12 (10.4 %) vs Heat Pump (Agile), or £0.16 after offsetting £8.96 gas stand. charge (30 d × £0.299)🥇🎉 Prices based on @octopus.energy tariffs 💚

Cost, Energy and Comfort Comparison [9 Days | 27 Nov 25 to 5 Dec 25] Boiler (Tracker) was cheaper by £3.79 (12.4 %) vs Heat Pump (Agile), or £1.10 after offsetting £2.69 gas stand. charge (9 d × £0.299)🥇🎉 Prices based on @octopus.energy tariffs 💚

Cost, Energy and Comfort Comparison [8 Days | 27 Nov 25 to 4 Dec 25] Boiler (Tracker) was cheaper by £3.32 (12.5 %) vs Heat Pump (Agile), or £0.93 after offsetting £2.39 gas stand. charge (8 d × £0.299)🥇🎉 Prices based on @octopus.energy tariffs 💚