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BTU Calculation Formula:
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The Oil Furnace BTU Calculator helps determine the appropriate heating capacity needed for a home based on square footage and insulation factors. Proper sizing ensures efficient heating and energy consumption.
The calculator uses the BTU calculation formula:
Where:
Explanation: The factor varies based on climate, insulation quality, and home construction. Colder climates and poorly insulated homes require higher factors.
Details: Correct furnace sizing prevents energy waste, ensures comfortable heating, extends equipment life, and maintains optimal efficiency. Oversized furnaces cycle frequently, while undersized ones struggle to maintain temperature.
Tips: Enter the total square footage of your home and select an appropriate factor based on your climate and insulation. For well-insulated homes in moderate climates, use 35 BTU/ft²/hr. For older homes in cold climates, use 50 BTU/ft²/hr.
Q1: What factors affect BTU requirements?
A: Climate zone, insulation quality, window efficiency, ceiling height, and home orientation all impact heating requirements.
Q2: Should I always use the highest factor?
A: No, using an oversized factor can lead to an oversized furnace, causing short cycling and reduced efficiency.
Q3: What about multi-story homes?
A: Calculate BTU requirements for each floor separately, as heat rises and upper floors may require less heating capacity.
Q4: Are there other considerations besides square footage?
A: Yes, consider window area, door quality, insulation R-values, and local climate conditions for accurate sizing.
Q5: Should I consult a professional?
A: This calculator provides estimates. For precise furnace sizing, consult with an HVAC professional who can perform a Manual J calculation.