Age verification requires identity verification once — but it doesn't require revealing your identity ever to a third party. With FHE (fully homomorphic encryption), identity data is encrypted on your device and never leaves it in plaintext. Not to the merchant, not to us as the verification service — nobody. We only compute on encrypted data and return a yes/no. I'm building this at identified.app
There's https://refraction.network/ but I am not sure how feasible that is at the moment (or at all). I came across it when researching some TLS stuff in golang (programming language).
Here in the Netherlands there's a huge incentive to move to heatpumps (subsidies and whatnot). I believe most of those (if not all) that are being installed have a defrosting mode which is automatically activated. I have seen mine defrosting in the last few days since it's finally below zero (celsius).
And the only answer is that it completely depends.
We spent €30k renovating our house but that included removing the entire old heating system, installing underfloor heating, extra insulation, ventilation, remove of gas pipes, new electrical switchboard, upgrade to 400V electricity and, well, the heat pump.
Just the device itself (air-water) is probably €6 or €7k excluding a €3.3k subsidy.
reply