What Size Furnace Do I Need? | Furnace BTU Sizing Guide 2025

 Choosing the right furnace size for your home in Murrieta or Temecula, CA is one of the most important steps toward keeping your home warm and energy-efficient during the colder months. At Hutchinson Heating and Air Conditioning LLC, we help homeowners make informed decisions about furnace sizing, installation, and system performance.

Why Furnace Size Matters

An oversized furnace can overheat your space quickly and shut off before completing a proper heating cycle, which leads to uneven heating and increased wear and tear. On the other hand, an undersized furnace will struggle to maintain temperature, run constantly, and consume more energy over time.

Getting the right size means better comfort, lower energy bills, and longer equipment life.

Understanding Furnace BTUs

Furnace capacity is measured in BTUs (British Thermal Units), which refers to how much heat a furnace can produce in one hour. The correct BTU level depends on several home-specific factors, including:

  • Total square footage of your home

  • Ceiling height

  • Level of insulation

  • Number and type of windows

  • Local climate conditions

Estimated Furnace Sizing by Square Footage

Home Size (sq. ft.)

Estimated Furnace Size (BTUs)

1,000 – 1,200

35,000 – 45,000

1,500 – 2,000

60,000 – 80,000

2,500+

100,000+

This is a general guideline. For accurate sizing, always rely on a professional Manual J Load Calculation by a qualified HVAC contractor.

Professional Furnace Installation in Murrieta & Temecula

At Hutchinson Heating and Air, we take sizing seriously. We never guess. Our team uses precise calculations to recommend the ideal furnace for your home whether it’s a gas furnace, electric unit, or heat pump. We’ve been proudly serving Murrieta, Temecula, and surrounding areas since 2004.

To dive deeper into proper furnace sizing, visit our full guide:
 What Size Furnace Do I Need? | Furnace BTU Sizing Guide 2025

More Than Just Heating We’re Your Full HVAC Partner

We don’t just install furnaces. We’re also known for dependable Air Conditioning Repair in Murrieta, CA, as well as:

  • Full HVAC system installations

  • Seasonal heating and cooling maintenance

  • Furnace tune-ups and repairs

  • Ductwork cleaning and air quality improvements

Our licensed and insured HVAC technicians are here to keep your home comfortable and your system running efficiently all year round.

Conclusion

Choosing the right furnace size isn’t just a technical detail, it's the foundation for a warm, energy-efficient, and reliable home heating system. At Hutchinson Heating and Air Conditioning, we combine local experience with proven HVAC expertise to deliver the right solutions the first time.

Don’t leave your comfort to guesswork. Let our experts guide you through furnace sizing, selection, and installation for long-term peace of mind. Contact us today and see why homeowners across Murrieta and Temecula trust us with their indoor comfort.

For more information also read this: Furnace BTU Sizing Guide 2025

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