June at Temperate: SEIS Closed, Baby Born & New Designs
What we did in June
We had our first company baby - from our CEO Charlie (well, his wife really). We’re firm believers that # of babies is a key indicator for the success of any company, so we’re optimising our KPIs early. Huge congrats to Charlie and family on the arrival of baby Ophelia. We’ll try not to wake her during team calls (no promises).
Closed our SEIS round. Investments from friends and family brought a welcome bump to our original projections—thank you to everyone who backed us. The funds are in, and we're deploying them directly into prototyping, testing, and delivery.
Finalised our first design for manufacture. In June we moved from a compelling concept to designing a real working unit. Not only does our casing design look great, we've made big improvements in our unit airflow - critical for good cooling.
Started manufacturing our first test unit. While we aimed to have our first unit built in June, manufacturing time for a first-of-its-kind prototype has taken a little longer than we planned for.
Sourced manufacturers. We now know exactly what it’ll cost to produce future units—whether one-off prototypes, batches of 10, or small-scale runs of 1,000 or 5,000. After a slight delay, all parts for our TRL5 unit are finally en route to our London lab.
Restructured our development plan. Rather than building one very expensive batch of early units, we’re moving to incremental prototyping. We'll build one unit at a time, test it, install it (likely in a friend’s slightly nervous home), and use what we learn to build the next. Less waste. More data. Better product.
Plans for July
Demo Day at Google. We’re pitching at an investor demo day hosted at Google’s King’s Cross offices by Carbon13. Expect real hardware, honest updates and a few good laughs.
Assemble the TRL5 unit. This is our first unit built from professionally fabricated materials—not just hand tools and late-night glue jobs. It’s designed to deliver 3,000 BTUs of cooling, ideal for a London-sized office (10–12m²). This one will live in our lab.
Design the TRL6 unit. The hardest unit is the first. With suppliers confirmed and a manufacturable design in hand, we’re kicking off work on the TRL6 version, taking us to the next level of cooling performance.
Metrics (June)
Metric Number Status
Monthly burn. £20,463 🟢
Runway remaining 10 months 🟢
Divergence vs budget +£22,800 🟢
How You Can Help
We’re a tiny team doing a ridiculous thing. We’d love to hear from you if:Know ISO/IEC testing inside-out? We’re beginning to think about international standards for cooling devices—especially European/ISO. If you’ve done this before, we’d love to learn from your experience. Hit reply to set up a quick 20-minute chat.We’re looking for an expert in fluid dynamics to come on board for a short bit of consultancy work. If you know someone who is a longtime expert and can collaborate with a plucky young startup, please intro to Sarah at sarah@temperate.uk
That’s it for June.Funding’s in. Designs are sharp. Prototypes are rolling. We’re building a product that’s radically more efficient—and we’re doing it one test at a time. Thanks again for being part of the journey.
The Temperate Team