When it comes to building or remodeling, the doors you choose may seem like a small detail. In reality, they play a significant role in how much energy your space consumes, how comfortable it feels, and even how much you spend on heating and cooling.
Energy-efficient doors are no longer just an option for eco-conscious homeowners—they are becoming an essential part of smart design.
At Eris Home Products, we believe that a great door should do more than look good. It should contribute to lower energy costs, improved comfort, and sustainable living.
That’s why our bi-fold doors are carefully engineered to meet California’s Title 24 standards, with certified ratings for both U-Factor and Solar Heat Gain Coefficient (SHGC).
These aren’t just technical details—they are performance markers that deliver measurable benefits every day.
In California, energy efficiency isn’t simply encouraged—it’s required. Title 24, Part 6 of the California Code of Regulations outlines strict standards for residential and commercial buildings.
Its goal is clear: reduce unnecessary energy consumption, support sustainability, and ensure healthier, more comfortable indoor environments.
For homeowners, this means that any new construction or major renovation must meet these standards, including requirements for windows and doors.
For builders, it means choosing products that comply with Title 24 is not only necessary for passing inspections but also critical for meeting client expectations for energy savings and comfort.
Eris bi-fold doors are designed with this in mind, making compliance straightforward while also offering exceptional design and functionality.
Two key measurements determine how energy-efficient a door is:
U-Factor – This measures how well a door prevents heat from escaping a building. A lower U-Factor means better insulation. Eris bi-fold doors achieve a U-Factor of 0.30 or lower, surpassing the standard set by Title 24.
Solar Heat Gain Coefficient (SHGC) – This measures how much solar heat passes through the glass. A lower SHGC keeps interiors cooler in warm climates, while a slightly higher number may be beneficial in colder regions.
Eris doors achieve 0.23 or lower, ensuring reliable performance across California’s varied climate zones.
Together, these ratings mean Eris bi-fold doors help regulate indoor temperature, reduce the need for excessive heating or cooling, and contribute to long-term energy savings.
Energy efficiency is at the core of our design philosophy, but it’s not the only benefit of choosing Eris bi-fold doors.
In short, our bi-fold doors aren’t just compliant—they are designed to perform beautifully and last for years.
A door may look simple, but it plays a vital role in how efficiently a building operates. Think of it as part of the “thermal envelope”—the layer that separates indoors from outdoors.
If a door leaks air or transfers heat too easily, it undermines the entire energy system of the building.
Eris doors are engineered to prevent this. Strong seals, precision construction, and coordinated glass and frame systems mean they actively manage airflow and temperature fluctuations. This translates into:
At Eris, we don’t rely on assumptions. Every bi-fold door undergoes standardized thermal testing to verify insulation and solar resistance.
These results are documented, ensuring full compliance with Title 24 and giving builders and homeowners confidence in real-world performance.
Equally important is how all components work together. True insulation requires more than high-quality glass—it depends on how the frame, seals, and glass interact as a single unit. That’s why we design our doors as integrated systems, not just collections of parts.
Meeting code is important, but we believe in going further. Title 24 sets the baseline, but sustainable building means thinking long-term. That means:
While numbers like U-Factor and SHGC matter on paper, what people notice most is how a door feels in daily life. With Eris bi-fold doors, comfort is immediate and lasting:
Choosing Eris bi-fold doors means choosing more than just compliance—it means choosing comfort, sustainability, and peace of mind.
With tested, certified ratings that exceed Title 24 standards, our doors set the benchmark for modern energy-efficient design.
Whether you are a homeowner looking to upgrade your living space or a builder seeking products that simplify compliance, Eris bi-fold doors are a smart, sustainable investment.
Elevate your project with doors that perform as beautifully as they look. Contact Eris Home Products today and discover the difference.
What makes a bi-fold door energy-efficient?
An energy-efficient bi-fold door minimizes heat transfer and solar gain through insulated frames, low-emissivity glass, and tight sealing. These features help reduce indoor temperature fluctuations and support lower energy use.
Is Title 24 compliance mandatory for all doors in California?
Yes, any new construction or major renovation in California must meet Title 24 energy standards, including U-Factor and SHGC requirements for doors and windows.
What U-Factor is considered compliant under Title 24?
The required U-Factor varies by climate zone, but most zones require a U-Factor of 0.30 or lower for doors to meet Title 24 performance standards.
Can bi-fold doors be both energy-efficient and stylish?
Yes. Modern bi-fold systems like those from Eris are designed to meet strict energy standards without compromising aesthetics, offering both thermal performance and visual appeal.
Do energy-efficient doors help with noise reduction?
In many cases, yes. The same features that insulate against temperature, such as tight seals and layered glazing also reduce sound transmission from outside.
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