1. What is a Whole House Heating Calculator?

Definition: This calculator estimates the total heat loss (Q) of a building based on its thermal properties and temperature difference.

Purpose: It helps homeowners and HVAC professionals determine heating requirements for residential buildings.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( Q \) — Total heat loss (Watts)
• \( U \) — Overall heat transfer coefficient (W/m²·K)
• \( A \) — Total surface area of the building (m²)
• \( \Delta T \) — Temperature difference between inside and outside (°C)

Explanation: The formula calculates how much heat energy escapes through the building envelope.

3. Importance of Heat Loss Calculation

Details: Proper heat loss estimation ensures correct sizing of heating systems, energy efficiency, and comfort.

4. Using the Calculator

Tips: Enter the U-value (thermal transmittance), total surface area, and temperature difference. All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What is a typical U-value for houses?
A: Modern homes typically have U-values between 0.15-0.25 W/m²·K for walls, while older homes may be 1.0-2.0 W/m²·K.

Q2: How do I find my home's total surface area?
A: Calculate the sum of all exterior walls, roof, floor, and window areas exposed to outside temperatures.

Q3: What temperature difference should I use?
A: Use the difference between your desired indoor temperature and the lowest expected outdoor temperature.

Q4: Does this include ventilation heat loss?
A: No, this calculates only conductive heat loss. Add 10-20% for typical ventilation losses.

Q5: How accurate is this calculation?
A: It provides a good estimate but professional energy audits give more precise results.