What Size Boiler Do I Need? – A Guide from Went’s Heating Services Ltd

Choosing the right size boiler is crucial to keeping your home warm and energy-efficient all year round. At Went’s Heating Services Ltd, we help homeowners across Shropshire, Powys, and Herefordshire choose the perfect boiler for their property — without overpaying on energy bills or underestimating their heating needs.

🔍 Why Boiler Size Matters

A boiler that’s too small won’t provide enough heating or hot water, while one that’s too large can waste energy and increase your bills. We assess every home carefully to recommend the right boiler output (measured in kW) based on your unique requirements.

🏡 What Affects Boiler Size?

1. Property Size

As a general guide:

🏠 1–2 bedroom flat or house: 20–24kW
🏡 2–3 bedroom semi-detached: 24–30kW
🏘️ 3–4 bedroom larger property: 30–35kW+

We tailor these figures based on the layout, number of radiators, and insulation quality.

2. Hot Water Demand

One bathroom? A standard combi boiler may be enough.
Two or more bathrooms or a larger family? You’ll need a higher-output system or conventional boiler to meet demand — especially during busy mornings.

3. Heat Loss

We consider how much heat your home naturally retains or loses. This depends on:

Age and construction of the property
Loft and wall insulation
Window type and quality (single or double glazing)
Room sizes and ceiling height

🛠️ Our Expert Boiler Sizing Assessment

When we visit your property, we carry out a full assessment, including:

✅ Reviewing your current heating setup
✅ Measuring and counting your radiators
✅ Evaluating insulation and window efficiency
✅ Discussing your hot water habits and heating preferences
✅ Planning for future changes (e.g. loft conversion, air source heat pump, or extension)

📞 Need Help Choosing the Right Boiler?

Let us take the guesswork out of it. Book a visit from our qualified engineers today, and we’ll make sure your next boiler is the perfect fit for your home and lifestyle.

Contact Went’s Heating Services Ltd:

📞 Phone: 07554 448 238
📧 Email: info@ilwent.co.uk
📍 Areas covered: Shropshire, Powys, Herefordshire