Frequently Asked Questions
Are heat pumps suitable for older properties?
Yes, when designed properly.
Many older homes can successfully run an air source heat pump, but they require detailed heat loss calculations and correct emitter sizing. The key is low flow temperature design and ensuring the property has suitable insulation levels.
At UKB Renewables, we assess each property individually and provide honest technical advice on suitability before recommending installation.
Will a heat pump work with my existing radiators?
Sometimes, but not always.
Heat pumps operate most efficiently at lower flow temperatures than traditional boilers. This often means radiators may need upgrading to larger surface areas.
We calculate heat outputs room-by-room to determine exactly what is required. We do not guess or assume compatibility.
Are heat pumps expensive to run?
When designed correctly, heat pumps can significantly reduce running costs compared to older or inefficient boiler systems.
Performance depends on:
- Correct system design
- Flow temperature optimisation
- Proper commissioning
- Smart controls
A poorly designed system will cost more to run. A properly engineered one will deliver strong seasonal efficiency.
Do I qualify for the Boiler Upgrade Scheme (BUS) grant?
As MCS certified installers, we can install systems eligible for the Boiler Upgrade Scheme, subject to current government criteria.
We guide you through the process and ensure your installation meets compliance requirements.
How long does a heat pump installation take?
Most residential installations take between 3–7 days depending on:
- Property size
- System complexity
- Radiator or underfloor upgrades
- Electrical requirements
We provide a clear project timeline before work begins.
How long do heat pumps last?
A well-installed and properly maintained air source heat pump can last 15–20 years or more.
Correct commissioning and annual servicing play a major role in system longevity.
Do heat pumps require servicing?
Yes.
Annual servicing helps:
- Maintain efficiency
- Protect manufacturer warranties
- Extend system lifespan
- Identify potential issues early
We offer professional heat pump servicing across Kent, Surrey, Sussex, London and Essex.
Why do some heat pumps fail to perform properly?
In most cases, poor performance is due to:
- Incorrect heat loss calculations
- Oversized or undersized systems
- High flow temperature design
- Incorrect hydraulic configuration
- Poor commissioning
Heat pumps are not boilers. They must be engineered differently.
This is why design expertise matters.
Why should I choose UKB Renewables over larger national installers?
We are a director-led specialist company focused on technical excellence.
You deal directly with experienced professionals, not sales surveyors.
All heating system design and installation is handled in-house, giving you:
- Technical accountability
- Consistent workmanship
- Honest advice
- Long-term support
We prioritise performance over volume.