I'm really baffled as an Australian. I admit, our climate is mild but we do have 4 degree C nights and 44 degree C days sometimes. I spent AUD$10k (US$6k I thin

I'm really baffled as an Australian. I admit, our climate is mild but we do have 4 degree C nights and 44 degree C days sometimes. I spent AUD$10k (US$6k I think?) on split system aircon for my entire house and they work totally fine. In fact I must have slightly oversized because they have easily performed in the most extreme conditions. Installation took all morning. It's not about the technology. It's about how electricity is priced very highly compared to gas in the UK. Our electricity in Western Australia is only double the cost per kWh compared to gas, but one kWh of electricity generated three kWh of heat in a reverse cycle air con so it's a no brainer.