COP and EER from capacity and power

Code snippets

curl "https://api.oanor.com/heatpump-api/v1/cop" \
  -H "x-oanor-key: oanor_test_..."

await fetch("https://api.oanor.com/heatpump-api/v1/cop", {
  headers: { "x-oanor-key": "oanor_test_..." }
});

$ch = curl_init("https://api.oanor.com/heatpump-api/v1/cop");
curl_setopt($ch, CURLOPT_HTTPHEADER, ["x-oanor-key: oanor_test_..."]);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$out = curl_exec($ch);

import requests
requests.get(
    "https://api.oanor.com/heatpump-api/v1/cop",
    headers={"x-oanor-key": "oanor_test_..."}
)

Example response

A real response from this endpoint, captured by the latest health check.

{
    "data": {
        "cop": 3.52,
        "note": "COP = the heat moved ÷ the electrical power, in the same units — a COP of 3.5 means 3.5 kW of heating or cooling for every 1 kW of electricity, which is why heat pumps beat resistance heating (COP = 1). EER is the same thing in Btu per watt-hour (COP × 3.412), the US cooling rating. Both fall as the temperature lift grows, so a quoted COP only holds at its rating conditions.",
        "inputs": {
            "capacity_kw": 7.034,
            "power_input_kw": 2
        },
        "capacity_tons": 2,
        "eer_btu_per_wh": 12,
        "capacity_btu_hr": 24001
    },
    "meta": {
        "timestamp": "2026-06-06T23:53:55.638Z",
        "request_id": "e3687876-2cd4-45d5-a72b-64680c6a6e91"
    },
    "status": "ok",
    "message": "COP / EER",
    "success": true
}