Quilt Solves Heat Pump Efficiency with Data-Driven Design

Smart home innovator Quilt has launched its new three-zone heat pump, promising to deliver consistent efficiency even in demanding conditions that typically challenge traditional systems. This advanced unit, capable of driving three indoor heads from a single outdoor unit, simplifies large installations and minimizes external footprint. The company's expansion plans were recently bolstered by a $20 million Series B funding round focused on accelerating sales. But the real story behind Quilt's latest innovation is how the company leveraged extensive sensor data to overcome a persistent challenge in heat pump technology, ensuring optimal performance.

Data-Driven Innovation Powers Quilt's New Heat Pump

Since its inception, Quilt has prioritized collecting vast amounts of operational data from its heat pumps. Unlike typical units, Quilt's systems are not only internet-connected but also equipped with a comprehensive suite of sensors. This rich data stream has enabled Quilt engineers to achieve optimizations that elude many competitors.

For instance, in September, the company deployed an over-the-air update to existing heat pumps, unlocking an additional 20% capacity. This enhancement, which could be directed to one or two zones, significantly improved comfort for users during extreme weather events like heat waves and cold snaps. The same data-driven approach was instrumental in developing the new three-zone unit and tackling a fundamental challenge in multi-zone HVAC systems.

Solving the Heat Pump's Core Challenge: Low-Speed Efficiency

Multi-zone heat pumps, like all modern heat pumps, perform most efficiently when operating at variable speeds. This means the compressor adjusts its speed to match the exact heating or cooling demand, preventing unnecessary energy consumption. However, a significant challenge arises at very low speeds: compressors become inherently less stable and harder to control.

"It's a little harder," said Matthew Knoll, co-founder and CTO at Quilt, comparing it to maintaining a steady 11 mph in a car versus a stable 70 mph.

To compensate for this instability, most conventional systems are forced to stop the compressor once it reaches a certain low-speed threshold. This compromise inevitably sacrifices both efficiency and user comfort.

Quilt's Real-World Data Advantage and Engineering Solution

Quilt's advantage stems from its ability to analyze real-world operational data gathered from thousands of units already installed in homes and businesses. This extensive dataset provides unparalleled insights into system performance across diverse climates and usage patterns.

"The way most systems are developed, they're tested in a lab under a couple scenarios because testing's expensive. And you end up with kind of a you know an average product," Knoll explained. "We have a thousand units out there in many different climates, and if we see something, we can look at it across a bunch of different units to understand if there's room to optimize or if we're seeing a problem in a corner case."

Beyond data, Quilt's design incorporates a larger copper coil than many competitors, which allows for the specification of a smaller compressor. This combination, along with other design refinements, enables Quilt's three-zone unit to deliver nearly 90% of its rated capacity (27,000 BTUs) even at extreme temperatures of -13°F (-25°C), all without compromising low-demand performance or efficiency. Quilt proudly states that this makes it the most efficient three-zone mini-split on the market.

Advanced Performance and Future Outlook

To further enhance energy savings, each indoor head can be controlled independently, providing as little as 2,210 BTUs of heat or 1,570 BTUs of cooling. Even when heating or cooling isn't actively required, refrigerant continues to flow through the lines. However, thanks to the outdoor unit's superior low-speed performance, it releases only about 300 BTUs of heat in heating mode – roughly equivalent to the heat generated by a grown adult.

Looking ahead, Quilt's CTO Matthew Knoll remained tight-lipped about specific future products, but affirmed the company's ambition to "have a solution for all homes." It's clear that the continuous stream of operational data will remain a cornerstone of Quilt's ongoing product development and innovation.