Radiators & Heat Pumps

Do I Need New Radiators with a Heat Pump?

One of the most common questions we hear is: “Will I need to replace all my radiators?” The answer is: not always. Many homes can keep some or all of their existing radiators, but in some cases upgrades are recommended to make sure every room stays warm and your heat pump runs efficiently.

Why Radiator Size Matters

Heat pumps operate at lower flow temperatures than traditional boilers — typically 35–55 °C, depending on your home and the system design. At these lower temperatures, radiators need enough surface area to deliver the required heat.

What Happens During Our Survey?

As part of your free on-site survey, we will:

Carry out room-by-room heat loss calculations
Check the size and condition of your existing radiators
Identify whether any need upgrading to suit a heat pump’s lower flow temperature
Recommend the right mix of emitters (radiators and/or underfloor heating) so your home stays comfortable and efficient

Radiator Upgrades - Tailored, not total.

Upgrading doesn’t mean replacing every radiator. In most homes, only a few need to be swapped out — usually in larger or harder-to-heat rooms. Options include:

This way, you only replace what’s necessary while ensuring the whole system works as it should.

TRVs and Controls

Heat pumps work best when running steadily at low temperatures, so system flow is critical. Thermostatic radiator valves (TRVs) can be useful in some situations, but they’re not always recommended, especially in bedrooms, as shutting radiators off can reduce efficiency.

Instead, we design your system so it naturally delivers the right heat to every room, with smart controls to keep your home comfortable and efficient. We’ll always advise on the best control setup for your property.

Getting the Best Efficiency

To make the most of your radiators and heat pump system:

Keep radiators clear of large furniture and heavy coverings
Ensure radiators are bled and balanced during commissioning
Use stable, consistent temperature settings rather than frequent on/off cycles
Make small insulation improvements where possible (e.g. loft insulation, double glazing) to reduce heat demand

Why Choose Eaasy Heat?

Detailed room-by-room heat loss and radiator assessments
Clear recommendations on which radiators (if any) need upgrading — no guesswork
Systems designed, installed, and commissioned to the highest standards
Comfort in every room, with efficiency built in

EAASY HEAT LTD (FRN 1031139) acts as an Introducer Appointed Representative of Kanda Products & Services Ltd. Kanda is a trading style of Kanda Products & Services Ltd, Forward House, 17 High Street, Henley-in-Arden, B95 5AA, registered in England (11330964), authorised and regulated by the Financial Conduct Authority (firm reference number 920795). Kanda is acting as a credit broker offering finance products from a panel of lenders Credit is subject to status.