🟢 INTRO

Weather compensation is one of the most important features of a heat pump system — but it is often misunderstood or set incorrectly.

When configured properly, weather compensation allows your heat pump to automatically adjust its flow temperature based on outdoor conditions, improving both comfort and efficiency.

In many of the systems we review, incorrect weather compensation settings are a major cause of high running costs and unstable room temperatures.

🌦️ 1. What Is Weather Compensation?

Weather compensation adjusts the flow temperature of your heating system depending on the outdoor temperature.

👉 Colder outside = higher flow temperature
👉 Milder outside = lower flow temperature

This helps the system:

• Run more efficiently

• Maintain steady indoor temperatures

• Avoid unnecessary energy use

📉 2. How It Works (Simple Explanation)

Instead of running at one fixed temperature (e.g. 55°C):

👉 The system follows a heating curve

• At 10°C outside → lower flow temp (e.g. 35–40°C)

• At 0°C outside → higher flow temp (e.g. 45–50°C)

👉 This is the key to efficient operation

⚙️ 3. Setting the Heating Curve (Basic Approach)

Most systems allow you to adjust:

• Curve slope

• Base temperature

• Minimum / maximum limits

General starting point (typical UK system):

• Mild weather → 35–40°C

• Cold weather → 45–50°C

👉 Then adjust gradually based on performance

🔧 4. How to Adjust It Properly

The goal is simple:

👉 The house reaches temperature
👉 Without overshooting
👉 With steady operation

If the house is too cold:

• Slightly increase the curve

If the house is too warm:

• Slightly decrease the curve

👉 Make small changes only and allow time to stabilise

⚠️ 5. Common Mistakes

• Curve set too high → high bills, overheating

• Curve set too low → house struggles to heat

• Constant manual overrides

• Thermostat fighting the system

👉 These are very common in poorly configured systems

🔁 6. Thermostat vs Weather Compensation

When weather compensation is set correctly:

👉 The thermostat should act as a limit, not the main control

• Avoid large temperature swings

• Keep settings steady

💡 7. Real-World Insight

In many of the systems we review, simply correcting the weather compensation curve can significantly improve comfort and reduce electricity usage — without changing any hardware.

Not Sure If Your Settings Are Correct?

If your heat pump is not performing as expected, we can review your controller and system setup.

You’ll receive:

• Clear guidance on weather compensation settings

• Recommended flow temperature adjustments

• Simple step-by-step instructions

👉 Straightforward advice tailored to your system.