Hi Product Hunt 👋 I'm a public-health physician. In heat-wave work, the question that keeps me up is literally about sleep: how warm is the bedroom at 3 am, without air conditioning? A room that stays above 28 °C at night stops the body from recovering — a real danger for infants, the elderly and the sick — and nobody knows that number for their own home. Domihélie estimates it. Describe your home in five questions — construction period, insulation and where it sits, windows and shutters, orientation, occupants — and it computes the natural temperature of four rooms from a physical model: thermal mass of the walls, solar gains window by window, ventilation, occupants. No heating, no AC, no fan: the baseline everything else builds on. It runs on real weather from Open-Meteo (forecast, ERA5 reanalysis for any past date, or a typical climatological day), anywhere on Earth, and it projects the same rooms to 2030, 2050 and 2100 with CMIP6 and the IPCC AR6 warming levels. Every result says which data it used. What it is not: a measurement, or a thermal audit. Material properties are reference values by construction period. It's an honest estimate meant to show what passive measures buy you — shutters, insulation position, night ventilation — and which room to worry about first. Free trial, no sign-up: 3 real estimates plus an unlimited demo on Lille → https://domihelie.neocities.org/... Then €0.99 once — no account, no subscription, no ads; your last results stay on your phone. That single payment funds the data access. I'd love your feedback on the model's assumptions, on the orders of magnitude for your own rooms, and on the cases where it looks wrong — describe the home, give the place and the night, and I'll check. If you have a thermometer in a non-air-conditioned bedroom, comparisons are gold. Thank you!

Domihélie

Room temperatures of your home without AC, today or in 2100

Room temperatures of your home without AC, today or in 2100