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Huntly (steam)

Coal power plant in Waikato, New Zealand. Approximate location -37.5444, 175.15.

CoalWaikatoNew Zealand

Huntly (steam) is a 500 MW coal power station in Waikato, New Zealand. It is operated by Genesis Energy. Based on its capacity (estimated), it can supply roughly 625,714 homes (estimated). It ranks #4 of 43 New Zealand power plants by installed capacity. In context, coal supplies about 1.1% of New Zealand's electricity; the national grid averages 93 gCO₂/kWh (88.5% low-carbon) (2025).

500MW installed capacity
625,714homes powered (est.)

Plant data: WRI Global Power Plant Database (CC BY 4.0), id WRI1000306.

~2,190,000 t CO₂/yr (estimated) — in everyday terms

This facility's annual emissions are roughly equivalent to:

510,490passenger cars driven for a year
285,603homes' yearly energy use
36,500,000tree seedlings grown 10 years to absorb it

Estimated, not measured: from installed capacity at a typical 50% load factor × a typical coal emission factor (~1000 g CO₂/kWh, IPCC AR5 / US EIA). Actual emissions depend on plant efficiency and running hours.Equivalencies via US EPA Greenhouse Gas Equivalencies.

Owner

Operated by Genesis Energy. All plants by this company →

Local climate & thermal context

This coal plant burns coal to raise high-pressure steam that spins a turbine-generator. It sits in a temperate oceanic climate (Köppen Cfb) — Southern Hemisphere, latitude 37.5°S — which shapes how much energy it can produce and how its output varies through the year.

14.1°Cannual mean temp
1,494heating degree-days (base 18°C)
44cooling degree-days (base 18°C)
35 melevation

Monthly mean temperature

J: 19 °CJF: 19 °CFM: 18 °CMA: 15 °CAM: 12 °CMJ: 10 °CJJ: 9 °CJA: 10 °CAS: 12 °CSO: 13 °CON: 15 °CND: 17 °CD19 °C

Heating degree-days here run 39% below 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: 34/100 — this site sits in the mid 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.

How it compares & nearby plants

New Zealand has 1 coal power plant in this dataset, together about 500 MW of capacity.

Nearby power plants

Location

Coordinates -37.5444, 175.15 from WRI Global Power Plant Database (CC BY 4.0). View on OpenStreetMap.

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