Heat Geek Mini Store

What is the Heat Geek Mini Store?

Renewable energy sources need somewhere to store the hot water they produce. Unlike gas, they do not have extreme power density, so water has to heat up more slowly. For 22 million UK homes that do not have a storage cylinder or the space for one, this has made heat pumps difficult to justify. The Mini Store was built to solve that.

Designed by Heat Geek and manufactured by Newark Cylinders, the Mini Store is a pressurised shell and tube heat exchanger. It stores hot water at a fraction of the footprint of a conventional cylinder, with performance that makes it a genuine option for decarbonising homes where nothing else on the market would fit.

What the Mini Store offers

High flow rates

The Mini Store can deliver much higher hot water flow rates than a standard combination boiler. Up to three showers can run at the same time. That is not a claim most storage solutions of this size can make.

Fast recharge

Recharge time is where most compact storage solutions fall short. The Mini Store's recharge times are unmatched by any standardised hot water storage solution currently available. Operating at flow temperatures as low as 40 to 45 degrees, it works well with heat pumps and gets back up to temperature faster than anything comparable.

Fits almost anywhere

The Mini Store is around a quarter to a third the size of a conventional hot water cylinder. It fits in kitchen cupboards, small airing cupboards, under-stairs cupboards, and low roof spaces. For properties with very limited space, it can be laid horizontally or wall-mounted vertically using additional support brackets or cradles. Both ends include a ringstand, so it works in either orientation without modification.

Works with gas boilers too

The Mini Store is not only for heat pumps. Because it can transfer full power at low temperatures, gas boilers can run it at a flow temperature of under 45 degrees, possibly as low as 40 degrees. That gives you the highest efficiency gas hot water currently possible, with outputs comparable to a 250 to 300L cylinder.

Adam Chapman, founder of Heat Geek: "The Mini Store range is not just for heat pumps, because they can transfer full power at a low temperature. Gas boilers can be used at under a 45 degree flow temperature with these, possibly as low as 40 degrees, which will give the highest efficiency gas hot water in the world but with HUGE outputs comparable to a 250 to 300L hot water cylinder."

Is the Mini Store right for your home?

For homes where a standard cylinder is not an option, the Mini Store changes what is possible. If you have been told storage hot water cannot work in your property, it is worth asking whether the Mini Store has been considered.

If you do have the space for a full-size HG Series Cylinder, that is still the best option for most properties. But where space is the constraint, the Mini Store removes it.

Size guide

The Mini Store comes in five sizes, from 60L to 130L. All models share the same 475mm or 550mm diameter footprint.

General specification

Heat Geek Mini Store General Specification v1.4.