Pond mats

This section provides details of an example project featuring a cascaded ground source heat pump system fed by a pond mat ground array.

We have provided schematic drawings, example costs and a real-life case study to showcase how a cascaded ground source heat pump system architecture designed by Kensa can effectively meet a high commercial heating and hot water load.

For more information, call sales on 0845 680 4328.

Schematic drawing*

*For illustrative purposes only

Costed example

Cascaded system utilising pond matsHeat pump architecture
Heat pump architectureCascaded central plant
Total heat pump capacity120kW
Equipment type3x 45kW Plantrooms
Design conditions0/50°C
Potable DHW tempSpace heating only
Integral immersion heatersNo
Ground array typePond mats
Pond mats required24 plus header pipework
Lake area required - no flow6000sq/m
Equipment supply costs*£75-90K
Pond mat installation & trenching costs**£8-10K
LPG external costs & boiler equipment£14-16K
Total 20 year NDRHI funding***£350-500K
Estimated heat pump 20 year running costs****£350-400K
Estimated LPG running costs*****£450-550K
Heat pump lifetime expectancyHeat pump 20 years - pond mats 80 years
Heat pump annual servicingNot required
Projected carbon saving800 tonnes
* A cost range is depicted here as every project is different and can contain more design features than shown in this example
 **Installation costs for external kit only (costs to install internals equivalent to a traditional system)
 ***NDHRI is a 20 year index linked funding stream which assumes inflation at 3%
 ****Based on electric at 15p/kW/hr and COP of 3
 *****Based on LPG at 40p litre and 85% efficiency

Case study

Coming soon!