Hello david. Its interesting to hear about your work. I would be interested to know how you got your cop improvements. One really hard question to answer is that relating to intermittent/continuous heating. I have tried to get a better grip on the topic, but find that hard… when gauging ‘comfort’ rather than air temperature, it all gets more anecdotal. Anyhow, i feel that a lot of people are not aware that efficiency with HPs is so variable and that improvements are possible.
john cantor
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