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BTU Calculation Formula:
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The Heater Size Calculator For Garage helps determine the appropriate heating capacity needed for your garage space by calculating the required BTU (British Thermal Units) based on garage volume and desired temperature rise.
The calculator uses the BTU calculation formula:
Where:
Explanation: This formula accounts for the space volume and the temperature difference needed to achieve comfortable heating conditions in your garage.
Details: Correct heater sizing is crucial for energy efficiency, comfort, and safety. An undersized heater won't adequately heat the space, while an oversized unit can cause short cycling, reduced efficiency, and moisture problems.
Tips: Measure your garage dimensions to calculate volume (length × width × height). Determine the temperature rise needed (desired temperature minus current outdoor temperature). All values must be positive numbers.
Q1: Why is garage volume important for heater sizing?
A: Larger volumes require more BTUs to heat effectively. The volume directly impacts how much air needs to be heated and maintained at the desired temperature.
Q2: What is temperature rise and how do I determine it?
A: Temperature rise is the difference between your desired indoor temperature and the typical outdoor temperature. For example, if you want 70°F inside and it's 30°F outside, your ΔT is 40°F.
Q3: Are there other factors that affect heater sizing?
A: Yes, insulation quality, number of windows/doors, garage door type, and local climate can all affect heating requirements. This calculator provides a baseline estimate.
Q4: What types of garage heaters can I use?
A: Common options include electric heaters, natural gas heaters, propane heaters, and infrared heaters. Each has different installation requirements and efficiency ratings.
Q5: Should I add a safety margin to the calculated BTU?
A: It's often recommended to add 10-20% to the calculated BTU to account for heat loss through poorly insulated areas and extremely cold conditions.