Underfloor Heating Running Cost Calculator UK

Running Cost Formula:

\[ C = \frac{Q}{COP} \times P_{kwh} \times t \]

Heat Output (Q):

BTU/h

Coefficient of Performance (COP):

Energy Price (P_kwh):

£/kWh

Operating Time (t):

hours

Running Cost (C):

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1. What is an Underfloor Heating Running Cost Calculator?

Definition: This calculator estimates the running costs for underfloor heating systems in the UK based on heat output, system efficiency, energy prices, and operating time.

Purpose: It helps homeowners and installers estimate energy costs for underfloor heating systems to aid in budgeting and system comparison.

2. How Does the Calculator Work?

The calculator uses the formula:

\[ C = \frac{Q}{COP} \times P_{kwh} \times t \]

Where:

\( C \) — Running cost (£)
\( Q \) — Heat output (BTU/h)
\( COP \) — Coefficient of performance for heat pumps (typically 3–5)
\( P_{kwh} \) — Energy price (£/kWh)
\( t \) — Operating time (hours)

Explanation: The heat output is converted to kW and divided by the system's efficiency (COP) to determine electrical consumption, then multiplied by energy cost and operating time.

3. Importance of Running Cost Calculation

Details: Accurate cost estimation helps in choosing between heating systems, budgeting for energy expenses, and optimizing system operation.

4. Using the Calculator

Tips: Enter the system's heat output in BTU/h, COP (default 3.5), current energy price (default £0.34/kWh), and daily operating hours. All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What is a typical COP value for underfloor heating?
A: Most heat pumps have COP between 3-5. Electric systems have COP of 1. Higher COP means better efficiency.

Q2: How do I find my system's heat output?
A: Check manufacturer specifications or use our Heat Output Calculator based on room size and insulation.

Q3: What's the current average energy price in the UK?
A: As of 2024, average electricity price is about £0.34/kWh, but check your tariff for exact rates.

Q4: Does this include standing charges?
A: No, this calculates only the energy consumption costs. Add standing charges separately for total bills.

Q5: How can I reduce running costs?
A: Improve insulation, use smart thermostats, operate during off-peak hours, and maintain your system regularly.