1. What is SEAI Heat Pump Sizing?

The SEAI (Sustainable Energy Authority of Ireland) provides guidelines for properly sizing heat pumps for Irish homes. Correct sizing is crucial for efficiency, comfort, and system longevity.

2. How Does the Calculator Work?

The calculator uses SEAI-recommended methods to determine appropriate heat pump capacity based on:

• Design heat loss of the property
• Total floor area
• Property type (apartment, semi-detached, detached)
• Insulation level (based on BER rating)

Explanation: The calculation adjusts base heat loss figures according to property characteristics to recommend an appropriately sized heat pump.

3. Importance of Proper Sizing

Details: Correct heat pump sizing is essential for:

• Energy efficiency and lower running costs
• Optimal comfort levels
• System longevity and reliability
• Eligibility for SEAI grants

4. Using the Calculator

Tips: For accurate results:

• Use professional heat loss calculations where possible
• Measure floor area accurately
• Know your property's BER rating
• Consult with an SEAI-registered heat pump installer

5. Frequently Asked Questions (FAQ)

Q1: Why is heat pump sizing so important?
A: Oversized heat pumps short-cycle, reducing efficiency and lifespan. Undersized units can't maintain comfort in cold weather.

Q2: What's the difference between design heat loss and average heat loss?
A: Design heat loss is calculated for worst-case conditions (typically -3°C in Ireland), while average heat loss is lower.

Q3: Can I use this calculator for commercial properties?
A: No, this calculator is designed for domestic properties only. Commercial heat pump sizing requires different calculations.

Q4: How does insulation affect heat pump sizing?
A: Better insulation reduces the required heat pump size, as less heat needs to be replaced.

Q5: Is professional assessment still needed?
A: Yes, this calculator provides estimates only. Professional heat loss calculations and on-site assessments are recommended.