Lagarfoss is a 27 MW hydro power plant in East, Iceland. It is operated by Rafmagnsveitur ríkisins NA. Based on its capacity (estimated), it can supply roughly 27,030 homes (estimated). It ranks #15 of 20 Iceland power plants by installed capacity. Commissioned in 1975, it is around 51 years old — an older, legacy facility. As a non-combustion source, it has no direct CO₂ emissions from generation. In context, hydro supplies about 70.7% of Iceland's electricity; the national grid averages 28 gCO₂/kWh (100.0% low-carbon) (2024).
Plant data: WRI Global Power Plant Database (CC BY 4.0), id WRI1002801.
Installed capacity (MW), WRI Global Power Plant Database (CC BY 4.0).
Operated by Rafmagnsveitur ríkisins NA.
This hydro plant converts the energy of falling or flowing water through hydro turbines. It sits in a polar tundra climate (Köppen ET) — Northern Hemisphere, latitude 65.5°N — which shapes how much energy it can produce and how its output varies through the year.
Monthly mean temperature
Heating degree-days here run 127% above the median power plant in this dataset — a proxy for how much extra energy heated equipment must replace through its surfaces in winter.
Climate heat-demand index: 97/100 — this site sits in the top third of the power plants we cover by heating degree-days.
In colder climates, uninsulated hot equipment (boilers, turbines, valves, steam lines) loses proportionally more heat to ambient air — exactly the loss Inzonex modular insulation is designed to cut.
Climate normals: WorldClim 2.1 (1970–2000 monthly normals, 10 arc-min, CC BY 4.0); zone: Köppen-Geiger world climate classification (Kottek et al. 2006, 0.5° grid). Degree-days & heat-demand index computed by PowerAtlas — a modelled heat-demand proxy, not a measured site figure.
The #10 largest hydro power plant of 14 in Iceland by capacity.
Iceland has 14 hydro power plants in this dataset, together about 1,913 MW of capacity.
Coordinates 65.5069, -14.3656 from WRI Global Power Plant Database (CC BY 4.0). View on OpenStreetMap.
