1. What is a Heat Pump Size Calculator by Zip Code?

Definition: This calculator estimates the required heat pump capacity based on home square footage and climate factors determined by zip code.

Purpose: It helps homeowners and HVAC professionals determine the appropriately sized heat pump for efficient heating and cooling.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( BTUs \) — British Thermal Units (heat pump capacity)
• \( Square\ Footage \) — Area of space to be conditioned
• \( BTUs\ per\ Square\ Foot \) — Climate factor based on zip code

Explanation: The square footage is multiplied by a climate-specific factor (BTUs/sq ft) that varies by geographic location.

3. Importance of Proper Sizing

Details: Correct heat pump sizing ensures energy efficiency, proper humidity control, and system longevity. Oversized units short-cycle, while undersized units run constantly.

4. Using the Calculator

Tips: Enter your home's square footage and zip code. The calculator will suggest a BTU factor based on your climate zone, which you can adjust for insulation quality.

5. Frequently Asked Questions (FAQ)

Q1: How does zip code affect heat pump size?
A: Colder climates require more BTUs per square foot for heating, while hotter climates need more cooling capacity.

Q2: What's a typical BTU per square foot value?
A: Ranges from 20 BTU/sq ft (mild climates) to 60 BTU/sq ft (extreme climates), with 30-40 being common.

Q3: Should I adjust for insulation quality?
A: Yes, reduce BTU factor by 10-20% for well-insulated homes, increase by 10-20% for poor insulation.

Q4: How are BTUs converted to tons?
A: 1 ton of cooling = 12,000 BTUs. The calculator shows both values.

Q5: Does this account for multiple zones?
A: No, for zoned systems, calculate each zone separately or consult an HVAC professional.