August at Temperate: First Unit Built, Bring on the Second
What we did in August
First test data from our TRL5 prototype. Initial measurements came in below target, but we’re still cooling. At an inlet air temperature of 29 °C and outlet of 25 °C, we recorded a ΔT of 4 C. With an airflow of only ≈26 m³/h, that translates to about 35 W (~120 BTU/h) of cooling. It’s not as much as what we want, but the main goal for this version was to prove we could turn the science into cooling output. Next steps are focussed on maximising airflow and improving our panels.
Built another prototype. Instead of rebuilding the full-scale TRL5 unit, we created a new small version to test our key upgrades: improved airflow, better mirrors, and a target of double the per-panel cooling performance compared to July’s prototype.
Attended PropTech Connect . Not technically August, but we were at PropTech Connect last week (hence why we’re late this month to send this out). We brought along one of our cooling panels, animations explaining how our tech works and a goal in mind: meet property developers, hyperscaling data centre teams, and explore HVAC and data centre use cases. MIssion accomplished - we have some new leads on data centres, as well as a lot of interest from real estate, especially in Southern Europe. Our new thesis, that we can use our tech to improve the efficiency of central HVAC (by ~10%) went down a storm.
Accepted to UKRI trade mission - India bound! We’ve been selected for a UKRI trade mission focused on property startups in India. In October, our CPO Sarah will head to Chennai, Coimbatore, and Mumbai, touring new-build cities and meeting property developers, OEMs, and manufacturers. It's a big thumbs-up from the UK government on our tech and mission.
Plans for September
Test the new prototype. We’ll run testing and analytics sprints in September, looking for double the cooling power per panel of August’s prototype.
Pitching to AroundTown’s Investment Committee. As the ATechX accelerator wraps up, we’ll be presenting to AroundTown’s IC in September. We’re also speaking to a couple investors about a SAFE as opposed to an equity round as we initially planned - if you want to discuss, please reach out. We’re not capital constrained at the moment, and raising a SAFE now means we can focus on iterating on our tech and get us to the point where we can demonstrate 12k BTUs ahead of pilots in 2026.
Research & Refining our Roadmap. As mentioned previously, conversations with customers tell us that improving their existing systems through retrofit is extremely valuable. Right now, our focus is on iterating on the core technology for maximal cooling, but once it’s there we’re investigating whether data centre cooling or HVAC plugins (e.g. cooling refrigerant on the return link) are a better bet for our early pilots.
Metrics (August)
Metric Number Status
Monthly burn. £4,663 🟢
Runway remaining 11 months 🟢
Divergence vs budget +£407 🟢
How you can help
We’re a tiny team doing something audacious. If any of these strike a chord, we want to hear from you:
Data centre cooling champs: Can you or someone you know help us understand hyperscale cooling architectures? A 20-minute coffee chat would be gold.
India property or OEM networks: Know anyone in real estate development or home electronics manufacturing in Chennai, Coimbatore, or Mumbai? Introductions would help make every conversation count.
We’re moving fast, learning loads, and building what we believe will be the next generation of cooling. Thanks for being part of the crew.
The Temperate Team
(Less hot air, more cold air)