4 ms·
Not a bad point! Similarly why dont we have electric heaters doing useful work rather than just jumping that energy immediately?
by chobytes 5y ago
Not a bad point! Similarly why dont we have electric heaters doing useful work rather than just jumping that energy immediately?
- Dlanv 5y agoLiterally the exact same answer as in the link. Heat pumps can be up to 4-6x more efficient at heating than simple resistance based heaters. They can expense 1 watt of energy and heat a room up by 4-6 watts of energy.
- deleted 5y ago[deleted]
- fy20 5y agoYou should also take into account the cost of the heat source. I'm building a house to modern building standards that will have a thermal energy demand of 15W/m2/year. For our heating season and size of the house (160m2), that could easily be supplied by a 2kW electric radiator, at a cost of around €500 per year. So the total cost over 10 years, would be €5000 + the cost of the radiator (~€50). I'll also have solar, which will produce more electricity than that consumes per year, and we have nearly net metering (need to pay a few c for every kWh consumed), so the electricity bill would actually be a lot less. However the building codes in my country need you to have a "renewable" heat source, and an electric radiator + solar is not considered "renewable", so we will be going with a heat pump. Over 10 years that will be more expensive, the install cost alone is higher than the total cost of the radiator. Maybe eventually we will break even, but I don't think the heat pump will last much more than 15 years before needing to be replaced.
- macgyverismo 5y agoThermal energy per m2 of living area seems like a terrible way to calculate heat loss. Unless you mean you have 160m2 of outside facing surface area. Are you sure your numbers are correct?