1. What is Furnace Sizing?

Furnace sizing is the process of determining the appropriate heating capacity for a home based on square footage and climate factors. Proper sizing ensures efficient heating without energy waste.

2. How Does the Calculator Work?

The calculator uses the furnace sizing formula:

Where:

• \( BTU \) — British Thermal Units per hour (furnace capacity)
• \( Square\ Footage \) — Total heated area in square feet
• \( Climate\ Factor \) — 30-60 BTU per square foot based on climate severity

Explanation: The formula accounts for basic heat loss calculations based on home size and regional climate conditions.

3. Importance of Proper Furnace Sizing

Details: Correct furnace sizing prevents energy waste, ensures comfortable temperatures, extends equipment lifespan, and reduces operating costs.

4. Using the Calculator

Tips: Enter total square footage of heated space and select appropriate climate factor based on your region's winter severity.

5. Frequently Asked Questions (FAQ)

Q1: Why is proper furnace sizing important?
A: Oversized furnaces short-cycle, reducing efficiency and lifespan. Undersized furnaces cannot maintain comfortable temperatures.

Q2: What climate factor should I use?
A: Use 30 BTU/sq ft for mild climates, 45 for moderate winters, and 60 for cold regions with harsh winters.

Q3: Are there other factors to consider?
A: Yes - insulation quality, window efficiency, ceiling height, and home orientation also affect heating requirements.

Q4: Should I get a professional assessment?
A: For accurate sizing, consult an HVAC professional who can perform a Manual J calculation.

Q5: What if my home has high ceilings?
A: Multiply square footage by ceiling height factor (typically 1.1-1.3 for ceilings over 8 feet).