Comprehensive Project Support
Dedicated designers & engineers, onsite management, and technical support.
Extensive Warranty Coverage
2-year workmanship, 5-7 year heat pump, and 75-year pipe warranties.
Certified Heat Pump Installation
MCS-accredited, fully certified, providing expert heat pump installation services.
Boiler Upgrade Scheme
Certified installer for £7,500 boiler upgrade scheme grants.
Your Questions, Answered
Explore our FAQs to find helpful answers and insights about our renewable heating solutions, underfloor systems, and the services we offer.
Heat Pump FAQ’s
Installation
What are the different types of heat pumps?
- Air Source Heat Pumps (ASHP): Extract heat from the air outside.
- Ground Source Heat Pumps (GSHP): Extract heat from the ground through buried pipes.
- Water Source Heat Pumps: Use a nearby water source for heating.
Where should I install my heat pump?
- Air Source: Install on an external wall with sufficient airflow, away from obstructions, and not too close to windows (to reduce noise impact).
- Ground Source: Requires outdoor space for horizontal trenching or vertical boreholes.
How long does installation take?
- Air Source: 1-3 days, depending on complexity.
- Ground Source: 5-7 days due to excavation work.
Is planning permission required?
In many cases, heat pumps fall under “permitted development,” but check with local authorities, especially for listed buildings or conservation areas.
What size heat pump do I need?
Terra Therma will perform a heat loss calculation to determine the correct size based on:
- Property size.
- Insulation levels.
- Desired indoor temperature.
Can I use a heat pump with my existing radiators?
Yes, but they may need to be upsized since heat pumps operate at lower temperatures compared to traditional boilers. Underfloor heating is ideal for maximum efficiency.
What incentives are available for heat pump installation?
The Boiler Upgrade Scheme (BUS)
Running
How efficient are heat pumps?
- Heat pumps can achieve a Seasonal Coefficient of Performance (SCOP) of 3-4, meaning they produce 3-4 units of heat for every unit of electricity used.
- Efficiency decreases in extremely cold temperatures but is still higher than traditional systems.
How much does it cost to run a heat pump?
Costs depend on:
- Electricity tariffs.
- Heating demand.
- Thermal Performance of the property
- Heat pump efficiency.
Can heat pumps provide both heating and cooling?
Yes, many heat pumps are reversible, offering cooling in the summer using an air to air or air to water system.
Do heat pumps work in cold climates?
Modern heat pumps are designed to work efficiently in temperatures as low as -15°C to -25°C, though efficiency decreases on some models.
How noisy are heat pumps?
Noise levels typically range from 40-60 dB (similar to a fridge). Position the external unit away from windows and neighbours to minimise disturbance.
What maintenance is required?
Regular maintenance includes:
- Cleaning filters.
- Checking outdoor units for debris.
- Annual professional servicing to maintain efficiency.
How long do heat pumps last?
With proper maintenance, heat pumps last 15-20 years, depending on usage and quality.
Can a heat pump fully replace my boiler?
Yes, but your system may need modifications (e.g., larger radiators or underfloor heating) for maximum comfort and efficiency.
What happens if the heat pump stops working?
Most systems have backup heating elements within the hot water cylinder or can be paired with supplementary heating systems.
Environmental and Efficiency
Are heat pumps environmentally friendly?
Yes, heat pumps produce fewer emissions than fossil fuel systems, especially when powered by renewable electricity.
How does insulation impact heat pump efficiency?
Proper insulation is critical for efficiency. Poorly insulated homes require higher running costs to maintain comfort.
Can a heat pump work with solar panels?
Yes, combining a heat pump with solar PV panels can reduce electricity costs and improve sustainability.
Are heat pumps worth the upfront cost?
Heat pumps are cost-effective in the long term due to lower running costs and government incentives. They also add value to your home.
Do heat pumps need a backup heating system?
Some properties pair heat pumps with auxiliary heating like electric or gas systems for extreme conditions or higher head demand.
Troubleshooting
Why is my heat pump not heating properly?
Check:
- Thermostat settings.
- Error messages on the control display, if error message present, please call Terra Therma and report
- Blockages in filters or outdoor units.
- Insufficient refrigerant (requires professional servicing).
Why is my heat pump running constantly?
Heat pumps operate best at steady, low power over longer periods. Frequent cycling might indicate:
- Incorrect sizing.
- Poor insulation.
- Faulty thermostat.
Why is there ice on my heat pump?
Ice buildup is normal in cold weather; defrost cycles should clear it. Persistent icing may indicate:
- Poor airflow.
- Low refrigerant levels.
- Malfunctioning defrost system.
Can a power outage damage the heat pump?
No, but ensure the system is restarted properly to avoid operational issues.
Wet Underfloor Heating Systems FAQ’s
General
What is a wet underfloor heating system?
A wet underfloor heating system circulates warm water through pipes embedded in the floor to provide radiant heat. The water is heated by a boiler, heat pump, or other heating sources and flows through the pipes, warming the floor surface and the room.
How does a wet underfloor heating system work?
Water is heated by a boiler or heat pump and pumped through a network of pipes laid under the floor. The warm water radiates heat upwards, evenly warming the room from the ground up. This method provides consistent, efficient, and comfortable heating.
What are the benefits of wet underfloor heating?
- Even Heat Distribution: Heat is distributed evenly across the room, eliminating cold spots.
- Energy Efficiency: Wet underfloor heating systems operate at lower temperatures than traditional radiators, making them more energy-efficient.
- Space-Saving: No need for bulky radiators, freeing up wall space and providing a cleaner aesthetic.
- Comfort: It offers a comfortable, radiant heat that feels warm and natural compared to the hot air generated by radiators.
How much energy will I save with wet underfloor heating?
Wet underfloor heating is more energy-efficient than traditional radiator systems, especially when combined with renewable energy sources like heat pumps. Operating at lower temperatures, wet underfloor heating systems can reduce your heating bills by up to 30% compared to conventional heating methods.
How do I control the temperature of my wet underfloor heating system?
Wet underfloor heating systems are typically controlled through a programmable room thermostat that regulates the temperature of the water flowing through the pipes. Underfloor systems allow for zoning, where different areas of your home can be controlled independently for maximum efficiency and comfort.
Do I need to service a wet underfloor heating system?
Yes, regular servicing is important to ensure optimal performance. This includes checking for leaks, ensuring the pump is operating correctly, and verifying that the system’s pressure is at the correct level. It’s recommended to service the system annually to keep it running efficiently.
How do I maintain my wet underfloor heating system?
Maintenance for wet underfloor heating systems typically involves checking water pressure, ensuring the manifold is working efficiently, and flushing the system every few years to remove any sludge or debris that may accumulate. Having your system professionally serviced by Terra Therma regularly will ensure it stays in optimal condition.
Will wet underfloor heating dry out the air in my home?
No, wet underfloor heating does not dry out the air in your home. Unlike traditional convection heating, which circulates air, underfloor heating provides radiant warmth, which does not affect humidity levels, creating a more comfortable and healthier indoor environment.
Installation
Can wet underfloor heating be installed in an existing property?
Yes, wet underfloor heating can be installed in both new builds and existing properties. In retrofitting, the system is usually installed within a screed floor or suspended floor, with minimal disruption depending on the existing floor structure.
What types of floors are suitable for wet underfloor heating?
Wet underfloor heating can be installed under most floor types, including:
- Tile and stone: Tile and stone are among the best materials for heat transfer because they absorb and conduct heat efficiently. When combined with a wet underfloor heating system, these materials help the warmth spread evenly across the room, providing consistent comfort.
- Wood: Installing wood flooring with wet underfloor heating (UFH) can provide both a cozy atmosphere and efficient heating. However, it’s essential to choose the right materials and follow specific guidelines to ensure compatibility and long-term performance. Engineered Wood: Ideal for UFH as it has better dimensional stability and is less prone to warping or shrinking compared to solid wood. Opt for a thickness of 15-18 mm to ensure efficient heat transfer. Keep the surface temperature below 27°C (81°F) to prevent damage to the wood.
- Carpet: Carpets can act as an insulating layer, which may reduce the efficiency of heat transfer from the underfloor system to the room. The thickness of the carpet and underlay plays a significant role in how effective the heating will be.
- LVT: Can also be used with suitable considerations. Luxury Vinyl Tile (LVT) flooring is an excellent choice for pairing with wet underfloor heating (UFH) systems due to its durability, flexibility, and excellent thermal conductivity. Keep the surface temperature below 27°C (81°F) to prevent damage to the wood.
How deep do the pipes need to be installed?
The pipes in a wet underfloor heating system are usually embedded within a layer of screed, wood or insulation. The depth may vary depending on the specific underfloor heating system used.
How long does it take to install a wet underfloor heating system?
The installation time for a wet underfloor heating system can vary based on the size of the area and complexity of the installation. On average, it takes 1-2 days for installation in a standard-sized property, although retrofitting can take a little longer depending on the existing floor.
Is a wet underfloor heating system expensive to install?
The initial cost of installing a wet underfloor heating system can be higher than that of traditional radiators due to the materials and labour involved. However, the long-term energy savings and improved comfort can offset these costs, making it a good investment for many homeowners.
Where do I locate the manifold?
The location of a wet underfloor heating (UFH) manifold is crucial for efficient operation and accessibility for maintenance.
- Centralised location – Place the manifold as close as possible to the centre of the areas it serves to minimise the length of the pipe runs.
- Install the manifold in an easily accessible location for maintenance, balancing, or adjustments.
- Avoid hidden or cramped spaces; instead, choose locations like: Utility rooms, Cupboards under the stairs or a designated plant room.