Boiler & Heating Guides
20 practical guides written by our Gas Safe registered engineers — from choosing a boiler to fixing a frozen condensate pipe.
Installation
Complete Guide to Boiler Installation
Everything you need to know about getting a new boiler installed — from choosing a boiler to what happens on the day.
8 min readNew Build Boiler Guide: What You Need to Know
Moving into a new build or fitting a boiler to a new property? The requirements and considerations are different from a standard replacement.
5 min readUnvented Hot Water Systems: A Complete Guide
An unvented cylinder delivers mains-pressure hot water to every tap in your home. Here's how they work, what they cost, and whether you need one.
6 min readMaintenance
How to Re-pressurise Your Boiler
Boiler pressure dropping? Most homeowners can safely top up boiler pressure themselves in under 5 minutes. Here's how.
4 min readHow to Bleed a Radiator
Cold at the top, warm at the bottom? Your radiator needs bleeding. Here's how to do it safely in under 10 minutes.
4 min readUnderstanding Your Annual Boiler Service
What actually happens during a boiler service? What does the engineer check? And why does it matter for your warranty?
5 min readWhat is a Power Flush and Do You Need One?
Power flushing removes years of sludge, rust, and scale from your central heating system. Here's when you need it and what it costs.
5 min readFinance
0% Finance for Boilers: Everything You Need to Know
How does 0% boiler finance actually work? Who qualifies? And is it really better than paying cash?
5 min readBoiler Grants and Funding: What's Available in 2024
Government grants can significantly reduce the cost of a new boiler or heat pump. Here's what's available and whether you qualify.
6 min readSmart Controls
Smart Thermostats: Full Installation Guide
A smart thermostat can save £75–£150 per year on heating bills. Here's how they work, which ones are best, and what's involved in fitting one.
6 min readHow to Get the Most from Your Heating Controls
Most people use their heating controls incorrectly — wasting money every year. Here's how to set them up properly.
5 min readSeasonal
Preparing Your Heating for Winter
A 30-minute autumn checklist that prevents expensive breakdowns when temperatures drop. Don't wait until January for your boiler to fail.
5 min readFrozen Condensate Pipe: How to Fix It
Condensate pipes freeze in cold weather and cause boiler lockouts. Here's how to thaw yours safely in under 10 minutes.
3 min readRepairs
What to Do When Your Boiler Breaks Down
Boiler stopped working? Don't panic. Follow these steps before calling an engineer — you might fix it yourself.
4 min readUnderstanding Boiler Error Codes
Your boiler is flashing an error code. Here's what the most common codes mean across major brands.
6 min readSystem Protection
The Homeowner's Guide to Magnetic Filters
A magnetic filter is the best £149 you'll ever spend on your heating system. Here's why every boiler needs one.
4 min readSystem Inhibitor: What It Is and Why You Need It
Central heating inhibitor prevents corrosion, sludge, and limescale in your system. If you don't have it, here's how much damage it could be causing.
4 min readNeed Personalised Advice?
Our engineers are happy to answer any heating questions. Free advice, no obligation.