---
title: "Heat Pump Radiator Checker UK (2026) — Can I Keep My Radiators?"
source_url: "https://heatpumpreviews.co.uk/tools/radiator-checker/"
canonical_url: "https://heatpumpreviews.co.uk/tools/radiator-checker/"
retrieved_by: "AnswerRail Edge Engine v1.1.0-parity-v20 (https://answerrail.com)"
provenance: "Compiled for deterministic AI retrieval by AnswerRail Edge (RFC 9110 / RFC 9421)"
description: "Free UK heat pump radiator compatibility checker. Answer 3 quick questions to discover if your current radiators can run at 50°C–55°C or if you need an R290 high-temp heat pump."
rfc_compliance: "RFC 9110 / RFC 9309 / RFC 9421"
version: "1.1.0"
release_version: "v1.1.0-parity-v20"
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verified_latency: "<15ms (Warm Edge Cache HIT) / 80-250ms (Cold AST Compile)"
---

> **Canonical Source:** [https://heatpumpreviews.co.uk/tools/radiator-checker/](https://heatpumpreviews.co.uk/tools/radiator-checker/)
>
> *Free UK heat pump radiator compatibility checker. Answer 3 quick questions to discover if your current radiators can run at 50°C–55°C or if you need an R290 high-temp heat pump.*

# Do I Need New Radiators for a Heat Pump?

Test your home's thermal characteristics in 30 seconds to discover whether you can keep your existing radiators, how many might need upsizing, and which heat pump technology fits your property best.

### 🟡 Minor Upgrades Only: 80%–90% Radiators Retained

Your home can easily transition to a heat pump. You may only need to upsize 1 or 2 small single-panel radiators (Type 11) to compact double convector units (Type 22) in your largest living areas.

#### Book a Full Room-by-Room Heat Loss & Radiator Survey

Connect with an accredited MCS heating design engineer to measure your home's exact heat loss and specify the optimal flow temperature.

By submitting, you agree to our [Terms](https://heatpumpreviews.co.uk/terms/) and [Privacy Policy](https://heatpumpreviews.co.uk/privacy-policy/). Data vaulted under UK ICO Reg ZC136598. Matched with up to 3 accredited local MCS installers. Zero spam.

## How Radiator Sizing Physics Works

Traditional gas boilers blast water at 75°C for 20 minutes, turn off, and let rooms cool down. Heat pumps run continuously and gently at 45°C–55°C.

| Radiator Type | Internal Construction | Heat Output @ 50°C Flow | Heat Pump Suitability |
| :--- | :--- | :--- | :--- |
| **Type 11 (Single Convector)** | 1 front panel + 1 set of rear fins | ~450 Watts / metre | Low Output Typically upgraded in colder rooms. |
| **Type 21 (Double Panel Plus)** | 2 panels + 1 central layer of fins | ~750 Watts / metre | Moderate Often acceptable in modern insulated rooms. |
| **Type 22 (Double Convector)** | 2 panels + 2 internal fin rows | ~1,100 Watts / metre | Recommended **The Gold Standard:** Delivers 2.4× heat output without taking extra wall space. |
| **Underfloor Heating (UFH)** | Embedded continuous pipework | Whole floor emits heat | Optimal **Maximum SCOP:** Runs at 35°C–40°C with peak seasonal efficiency (>5.0). |

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