Whether you’re a homeowner, self builder, developer, landlord, or business, find the perfect ground source heat pump for your project with Kensa's heat pump solutions.
Kensa's design & support services coupled with a comprehensive range of ground source heat pumps ensure homeowners enjoy significant energy efficiency, bill savings & government funding.
Kensa’s ground source heat pumps bring social housing communities together to help eradicate fuel poverty & reduce heating bills. Using cost-effective Shared Ground Loop Arrays, housing associations can reduce carbon emissions on a huge scale.
Swimming pools, hot tubs, boat sheds, boats, water parks: you name it, we've fitted it! Ground source heat pumps offer an energy-efficient solution to heating & cooling water sources, as well as using water sources to heat & cool buildings.
Small but packing a punch, the award-winning Kensa Shoebox series produces temperatures up to 65°C. It features the quietest & smallest ground source heat pump on the market, offering an efficient, practical & affordable heating & hot water solution.
The efficient Evo series features 7kW, 9kW, 13kW & 15kW single phase models, & a 15kW three phase model. The elegant, simple-to-install, & ErP A+++ rated Evo series offers a 15% gain in efficiency & low noise outputs, perfect for medium to large homes.
The Kensa Q comprises of modular three phase models to provide tailored outputs for high heating & cooling demands, providing greater flexibility & compatibility with Building Management Systems
Installers are integral to the UK’s transition to low-carbon heating. Kensa is continually building a network of trusted, recommended and experienced installers across the UK.
Kensa offers a free, progressive and tailored training pathway for installers from all backgrounds. Start from the ground up or add to your existing knowledge whilst learning at your own pace.
Kensa's Partner Network recognises installers for their proven skills and experience with ground source heat pumps and offers exclusive member benefits.
Kensa has a nationwide network of trusted installers to help with your ground source heat pump project. Simply submit your plans and Kensa will recommend the right installer for you.
Kensa Heat Pumps is the UK’s number one ground source heat pump brand. We offer ground source heat pump training for trainers in training centres, sharing our extensive knowledge of ground source heat pump fundamentals and best practices with your trainers and students.
The Boiler Upgrade Scheme is a government-proposed scheme to deliver grants of up to £6,000 towards heat pump installations in UK households. The scheme, which was known as the Clean Heat Grant, is intended to replace the Domestic Renewable Heat Incentive (RHI) from April 2022 to 2028.
The ECO supports retrofit efficiency works in the domestic sector with an upfront grant, with a particular focus on vulnerable consumer groups & hard-to-treat homes.
The Public Sector Decarbonisation Scheme is a fund dedicated to heat decarbonisation & capital energy efficiency projects in non-domestic public sector buildings across England.
Through this scheme, an investor funds the network – known as Shared Ground Loop Arrays – to cover the most expensive aspect of the project. In return, the investor can charge connection fees if they wish.
Passive or active cooling is affordable, environmentally-friendly, and combats common issues with overheating. Delivering energy-efficient, low-carbon and low-cost cooling – without harming the environment or contributing to overheating – is a balance only achievable with ground source heat pumps.
Passive or ‘free’ cooling with a ground source heat pump is an available benefit to Kensa’s technology. Passive cooling provides ultra-low-cost cooling in the summer, whilst re-charging the ground for more efficient heating the following winter.
How does passive cooling work?
By integrating Kensa’s passive cooling module to the Shoebox heat pump or a separate plate heat exchanger to the Evo ground source heat pump, the distribution system bypasses the ground source heat pump and utilises the cooler temperature of the ground (compared to internal building temperatures) to deliver a degree of ‘free’ or passive cooling.
The low temperature of the ground cools the property technically via a fan coil, passive beams or other potential systems. This is simply achieved by passing the fluid of the cooling system through a plate heat exchanger with the ground array fluid passing through the other side.
What projects suit passive cooling with heat pumps?
While passive cooling works well in individual properties or communal areas, multiple property schemes featuring district heating systems using Shared Ground Loop Arrays are particularly suited to passive cooling.
What are the advantages of passive cooling?
Perfect with Shared Ground Loop Arrays
The Kensa Shoebox Ground Source Heat Pump, connected to an ambient Shared Ground Loop Array, fitted with the Kensa passive cooling module, provides a one-stop-shop efficient heating and cooling solution for clusters of multiple buildings and flats.
When connected to ambient Shared Ground Loop Arrays, ground source heat pumps with passive cooling will use the heat removed to recharge the ground array to improve the overall efficiency of the system, rather than just throwing it away.
Combined heating & cooling demands
Larger ambient Shared Ground Loop Arrays connecting multiple buildings with a mix of dwellings and commercial buildings creates further opportunities. The addition of mixed heating and cooling demands for the diverse building types offers the opportunity of efficiency improvements and reduced capital cost of the ground array, as the balanced load means borehole depths can usually be reduced.
If higher cooling loads are required, such as for glazed offices or server rooms, then dedicated cooling heat pumps can be used to provide active cooling. Connecting these to the same ambient temperature loops again gives you the benefit of recycling the waste heat to recharge the ground array and improve heating system efficiency.
Ultra-efficient cooling
In the summer, the ground is almost always more efficient for cooling than air. So when you combine heating and cooling options together this advantage increases.
For example, if you have a block of flats with retail space on the ground floor, such as a supermarket, then the annual heating load of the flats could be larger than the annual cooling load of the supermarket. In this scenario, the cold stored in the ground (created by extracting heat from the ground to heat the flats) can be enough to provide all, or much of, the annual cooling demand for the supermarket without the use of a heat pump at all!
How much does passive cooling cost?
As passive cooling bypasses the heat pump, the only running cost is the circulating pumps and distribution fan, which can typically be around £20 per year. This is a fraction of the cost of air conditioning.
The savings on heating costs will normally offset the running cost of cooling in the summer, so the cost of cooling is neutral – unlike regular air conditioning, where you pay to run a heat pump only to throw this heat energy out of the window!
The coolest bit about passive cooling is that any energy taken out of the building during the cooling process helps to recharge the ground array; this will increase the efficiency of the heat pump when providing hot water through the summer, and also store enough energy in the ground to improve the efficiency of the heat pump when heating the building the following winter.
Dr Matthew Trewhella, Kensa Contracting
What is Kensa's passive cooling module?
To help with the installation of passive cooling systems, Kensa has developed a passive cooling module and control wiring centre for use with the Kensa Shoebox only. When linked to Shoebox, this provides the components for a cost-effective cooling system.
The Kensa Passive Cooling Module can also be retrofitted to the Shoebox heat pump.
When operating in a reverse mode, ground source heat pumps can provide air conditioning, refrigeration or freezing. This active cooling is achieved by generating chilled water (typically at 6°C to 12°C) to cool the building, operating in a similar manner to a chiller. It is useful for properties that require higher cooling loads, such as glazed offices and server rooms.
What projects suit active cooling with heat pumps?
For applications requiring year-round cooling, the Kensa Commercial Range ground source heat pumps can be operated in active cooling reverse-cycle mode to deliver temperatures of 6°C – 12°C. Active cooling with ground source heat pumps is particularly commonplace in large commercial applications.
Kensa’s modular Commerical Range heat pumps enable the system to match any required cooling load.
How do I install ground source cooling?
The main skill requirement lies with the system designer. It already requires a specialist ground source designer with knowledge of heat pumps and geology to design a ground source heating system. When you add cooling into this, the level of complication increases. It also requires a higher level of accuracy from the building designer to correctly model the heating and cooling loads. Once the design is complete, the actual physical installation is straightforward and doesn’t require any skills that aren’t already present in the industry.
Kensa can help with the heating and cooling design and provide guidance on installing the ground source heat pump system. For larger-scale projects, Kensa Contracting offers complete project management of ground source heating and cooling schemes.
Buildings can overheat for a number of reasons: warmer summers, glazed exteriors, improvements in insulation standards. All of these factors highlight the need for cooling in domestic and commercial buildings. Now, in many modern commercial buildings, the demand for cooling is almost greater than the need for heating.
Glazing
Modern properties, particularly apartment and office blocks, are well insulated and tend to have large amounts of glazing, making them prone to overheating.
Traditional central plant systems
In such buildings, a traditional district heating system with a central plant is likely being used. In this system, hot water typically circulates at 65°C to 85°C through a network of pipes around the building. The system doesn’t know when each flat or office wants heating or hot water, so the high temperature circulating the pipework has to be maintained 24/7. This method of transferring heat throughout the building raises the temperature within the building, resulting in further overheating.
Pipe insulation degrades over time
Although the pipes in such traditional central plant district heating schemes are insulated, they will still leak some heat into the building. In summer this can cause the building to overheat. Over time, the pipe insulation degrades and often parts of it get damaged, making the problem worse – and of course, these heat losses also have to be paid for in energy bills.
Even if the central plant technology being used to provide heat is energy efficient and reduces climate change and air pollution, it can still worsen the overheating issue within the building. It could even be contributing to associated health problems.
Why is overheating in buildings a problem?
As buildings become increasingly airtight and well insulated, the need for cooling in new builds and commercial premises is increasing. The Royal College of General Practitioners even warns that hotter summers and increased air pollution could result in a summer crisis on a parallel with cold-related hospital admissions and excess winter deaths.
Using traditional cooling systems to combat overheating is self-perpetuating. Traditional means to deliver cooling expel hot air and contribute to carbon emissions, both of which ultimately lead to increased outdoor temperatures. The cycle therefore continues.
Wouldn’t it be wonderful if there was a solution to reduce overheating in modern and efficient buildings, and to cool buildings without contributing to air pollution, climate change or urban heat islands? And what if that solution was affordable, or even free?
Cooling with ground source heat pumps is the answer.
How can ground source heat pumps prevent overheating in buildings?
Ambient Shared Ground Loop Arrays avoid the common overheating, heat loss and energy waste problems associated with district heating entirely.
In this decentralised approach to district heating, a Shared Ground Loop Array connects ground arrays, such as boreholes, to individual ground source heat pumps in each dwelling.
The ambient heat circulating the building is low temperature (-5°C to 20°C), and the higher grade heat for each dwelling is produced by the heat pump at the point of use. This eliminates any heat loss through the distribution pipework. The pipes are still insulated but only to prevent condensation, not to retain heat.
As such, there is no heat loss from the system to contribute to overheating in risers and corridors.
Furthermore, as the cold side infrastructure extends all the way to the individual property, it is relatively straightforward to add passive cooling to the system.
Kensa’s ground source heat pump systems offer free passive cooling, whilst the ambient temperature of the distribution system further offsets any potential overheating. Passive cooling uses the low temperature of the ground loop to cool the property via a fan coil, which can be located in the main living rooms or bedrooms to provide comfort…
Overheating is an issue that needs to be faced when looking at the design of multiple occupancy buildings. This video explores how “Shared Ground Loop Arrays” with ground source heat pumps can avoid the common overheating problems associated with district heating losses, and also provide passive cooling for free. *Please note: the Non-Domestic RHI funding stream…
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