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Plumbing Company london | Can a heat pump be fitted to an existing heating system?

Sep 20


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Can an air source heat pumps work in an existing home?

Yes, air-source heat pumps can be integrated into existing, heating and hot water systems with careful consideration and appropriate modifications. These heat pump heating system work by extracting warm air from the air outside by transferring it inside the building for space heating or domestic hot water.

The air-source heat pumps can work in temperatures as low as -10 degrees Celsius. The integration process involves evaluating the compatibility of the air source unit with your existing system and making necessary adjustments.

The heat pump can work alongside your old system, such as radiators or underfloor heating (UFH), by utilizing the existing distribution system.

However, the efficiency of the heat pump is affected by the design and size of your current system, and it’s recommended to consult with our professional heating engineer to ensure proper integration and optimal performance.

Why you should choose an air-source heat pump?


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Choosing an air-source unit offers numerous options for heating your home.

Alternative choices are available, such as opting for a ground source heat pump as well. To ensure the effective operation of a ground source heat pump, it is necessary to drill deep holes into the ground for the system’s proper installation.

Here are some key reasons why you should consider installing an air-source heat pump:

1. Energy Efficiency: Air-source heat pumps are highly energy-efficient. They extract warm air from the outdoor cold air to provide heating in winter and some areas cooling in summer. Compared to traditional central heating systems that rely on burning a fossil fuel boiler like old gas boilers, heat pumps consume less energy and can significantly reduce your bills.

2. Low Carbon Emissions: Heat pumps produce fewer greenhouse gas emissions compared to conventional systems. By using less fossil fuels for boilers and utilizing renewable energy from the air, they contribute to a greener environment and help combat climate change.

3. Year-Round Comfort: air-source heat pumps in winter takes heat from the cold air, providing consistent warmth indoors. In summer, they get enough heat and can reverse the process as much heat to provide you with hot water for the cylinder.

4. Running costs: While the initial investment in an air source unit might be higher than traditional systems, the long-term cost savings are substantial. Reduced energy consumption, higher temperatures, and lower utility bills can lead to a quick return on investment over time.

5. Low Maintenance: Air-source heat pumps have fewer moving parts compared to combustion gas or oil boiler-based heating systems. This translates to lower maintenance requirements and costs. Regular maintenance, such as cleaning filters and checking refrigerant levels, is usually all that’s needed to keep the home heating system running smoothly.

6. Long Lifespan: Heat pumps are designed to last for many years, often exceeding 15-20 years with proper care. This longevity ensures a reliable system for your home.

7. Quiet Operation: Air-source heat pumps operate quietly, at low flow temperatures generating minimal noise both indoors and outdoors. This ensures a comfortable living environment without disruptive sounds.

8. Zoning Flexibility: Heat pumps can be equipped with zoning capabilities, allowing you to zone specific areas of your house and warm your home as needed. This feature enhances comfort and energy efficiency by less energy loss.

10. Future-Proofing: As the world moves toward cleaner energy sources, installing an air source unit positions you ahead of the curve. It ensures that your home is equipped with a technology that aligns with sustainable practices and potential future regulations.

Government Incentives

To encourage people to use energy-efficient devices like heat pumps, many governments offer incentives, rebates, and tax credits. Taking advantage of these benefits can lower the cost of buying and installing hybrid systems even more.

There are currently two government grants available in the UK to help homeowners pay for heat pumps:

  • Boiler Upgrade Scheme: This scheme offers grants of £5,000 towards an air source heat pump or £6,000 towards a ground source unit. It is open to homeowners in England and Wales who have an existing fossil fuel system.
  • Domestic Renewable Heat Incentive (RHI): This scheme offers payments for seven years to homeowners who install a qualifying heat pump. The amount of payment you receive depends on the type of heat pump you install and the amount of renewable heat it produces. The RHI is open to homeowners in England, Scotland, Wales, and Northern Ireland.

To be eligible for either of these grants, you must meet certain criteria, such as:

  • Your home must be a detached, semi-detached, terraced house, or a bungalow.
  • Your home must be connected to the mains electricity and gas supply.
  • Your existing heating system must be at least 10 years old.
  • You must have a valid Energy Performance Certificate (EPC) for your home.

Do you have any space for the heat pump?

Air-source heat pumps come in various sizes and configurations, making it possible to find an option suitable for most spaces. These units can be installed outdoors, typically on a wall or on a concrete pad, and require sufficient clearance for proper airflow.

It’s important to ensure that there’s enough open space around the unit to facilitate air circulation and efficient operation. If you’re concerned about space limitations, consult with MML Plumbing and our professional installer can assess your property and recommend the best placement for the air source heat pump.


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