1. What is an Air Source Heat Pump Running Cost Calculator?

Definition: This calculator estimates the operating cost of an air source heat pump based on heat load, coefficient of performance, and energy price.

Purpose: It helps homeowners and energy professionals estimate heating costs and compare efficiency of different systems.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( \text{Cost} \) — Running cost (currency)
• \( \text{Load} \) — Heat energy required (kWh)
• \( \text{COP} \) — Coefficient of Performance (dimensionless)
• \( \text{Price} \) — Energy cost (currency per kWh)

Explanation: The heat load is divided by the COP to get electrical energy consumed, then multiplied by energy price to get total cost.

3. Importance of Running Cost Calculation

Details: Accurate cost estimation helps in budgeting, system comparison, and evaluating energy efficiency improvements.

4. Using the Calculator

Tips: Enter the heat load in kWh, COP (default 3.5), and energy price (default 0.15). All values must be > 0 (COP > 0.1).

5. Frequently Asked Questions (FAQ)

Q1: What is a typical COP value?
A: Modern ASHPs typically have COP between 2.5-4.0, varying with temperature and system efficiency.

Q2: How do I find my heat load?
A: Use heat loss calculations, previous energy bills, or consult a heating engineer for accurate figures.

Q3: Should I use current or projected energy prices?
A: For long-term planning, consider projected prices. For current estimates, use your actual tariff rate.

Q4: Does this include maintenance costs?
A: No, this calculates only energy costs. Maintenance is typically 1-2% of system cost annually.

Q5: How does outdoor temperature affect results?
A: COP decreases in colder weather. For accurate annual estimates, use seasonally-adjusted COP values.