Dragon Renewables Biomass Cambridge

Ground and Air Source Heat Pump Systems

Dragon Renewables has experience gained since 2004 of scoping, planning and installing Ground Source and Air Source Heat Pump heating solutions.

  • Save money on your heating bills
  • Use a sustainable and renewable fuel source.

Ground Source and Air Source Heat Pump Installation

Heat pump systems are a great replacement for any fossil fuelled water based heating and hot water system. These systems are most suitable for underfloor heating systems (can also produce higher temperature water for radiators but efficiency falls away as the temperature rises.)

Ground Source Heat Pumps (GSHP) rely on a heat collector which is laid below the ground surface either as a series of coils (a "slinky") in a trench/trenches or in a lake/large body of water or a bore hole. GSHP's have a higher rate of heat output as the ground is at a steady temperature of around 10°C (compared to an Air Source Heat Pump (ASHP) which collects it's heat from the outside air.)

  • Achieves Level 4 of the Code for Sustainable Homes with no additional measures and can achieve higher when used in conjunction with other improvements
  • Improves energy use leading to lower running costs and CO2 emissions
  • Qualifies for the current Renewable Heating Premium Payments (RHPP) and upcoming renewable heating incentives planned by the Government
  • 5% VAT rating on capital and install costs
  • Self-contained outdoor unit only requiring water and electric connections
  • No gas supply, flues or ventilation required, therefore poses no carbon monoxide risk
  • Low noise levels - Ecodan has achieved the Noise Abatement Society's Quiet Mark
  • MCS approved


ground source heat pump

Choosing the right type of Heat Pump


You should consider the following when choosing a Heat Pump heating system;

  • Budget
  • Land available / bore hole(s)
  • Type of existing heat emitters
  • Hot water requirements


Air Source Heat Pumps (ASHP's) are cheaper than Ground Source Heat Pumps (GSHPs) to install but are not as efficient in the longer term.

Heat pumps work best at a lower temperature output (35°C) than traditional boilers

If connecting to an existing system (ASHP & GSHP) all radiators will require changing to accommodate the lower operating temperature

The hot water cylinder will need changing for a cylinder with a large surface area internal coil


Air Source Heat pump

Takes heat from the outside air 

Needs large hot water cylinder with minimum 3m² heat exchanger (coil) 

Electricity single phase 240V or three phase415V . 

Heat emmittersIdeally Under floor heating or oversized radiators 

Max heat load single phase 14kW 

Cost and efficiency COP 2.87


Ground Source Heat pump

Takes heat from the ground via a collector 

Needs large hot water cylinder with minimum 3m² heat exchanger (coil) 

Small hot water cylinder heated by immersion heater or another fuel boiler 

Electricity single phase 240V or three phase415V

Heat emitters ideally Under Floor Heating or oversized Radiators 

Some GSHP's need LPG or Biomass for hot water 

Max heat loadsingle phase single unit 24kWn/a

Cost and efficiency- COP 4.0

Advice and Support Services

  • We will help you to choose the right renewable heating system for your property, budget and space.
  • We can help you decide between ASHP and GSHP systems and offer advice on the relative costs of each system and the advantages and disadvantages of each type.
  • We can advise you on the space requirements for each system including the ground loops
  • We will be able to give you a guide on the annual running costs.
  • We can inform you of the latest Government support schemes.
  • We provide a free telephone interview service to assess your requirements. If after this interview we have reached a point where a site survey is necessary we will visit you to finalise the choice of renewable heating /hot water system, double check space available, Heat pump options and the connections to the existing or future heating system. We charge an hourly rate +VAT including travel time for site visits.

Installation Services

  • We will move your appliance into its chosen place from the delivery lorry.
  • We will plumb in the appliance.
  • We can insulate all our pipe work (after testing).
  • We will order and assemble the required ground loop collectors for your new Ground Source Heat pump.
  • We will install the Ground loops in trenching which has been dug to our specification by your contractors
  • We can install your underfloor heating system and commission it in conjunction with the Heat pump.
  • We can organise our plumbing partners to install a full heating system to run alongside our Heat pump installation.
  • We will connect up the chosen electrical control system and ensure that it is all working at commissioning.

Maintenance Services

  • We aim to provide support for your newly installed system (via telephone) seven days a week between 7.30am and 9pm. If there is a problem with the system that we have installed or a fault of our making within the first 12 months we will provide a site visit free of charge.
  • We can service your appliance annually and supply and order any necessary parts other than those already covered by warranty (charged on a cost-plus basis).
  • Annual services will be charged at an hourly rate per man, including travel time plus disposables + VAT

Why choose us?

Dragon Renewables a small family-run business dedicated to providing the most appropriate renewable heat systems for your home or business.

  • We supply a balanced and fair assessment of your requirements
  • We supply a range of solutions and technologies that we constantly review and update and for which we are accredited under the Micro Certification Scheme


  • Ground Source and Air Source Heat Pump Installation
  • Advice and Maintenance services available
  • Qualified and experienced Renewables Plumbing, Heating and Electrical experts.


Download our 'Renewables Ready' checklist

More info?

For more information, or to arrange a survey, please contact Jonathan Cooke today

Saffron Walden (01799) 598 086