This page is about getting ready for a new boiler, not about the warning signs that a new boiler is needed.
If you’re still deciding whether the old unit should come out, read signs you need a new boiler or the repair versus replacement guide first.
We’re a plumbing, heating and gas firm based at 31 Bishop’s Ave, Bishop’s Stortford CM23 3EJ, United Kingdom, and we also fit boilers in Harlow. Call 07935 205813 any time, because we’re open 24/7.
Before you choose a new boiler
Anyone who works on the gas appliance itself must be Gas Safe registered, and you can check that on the Gas Safe Register website.
The Energy Saving Trust boiler advice is useful background if you want to read about new boilers in general.
It isn’t a formal checklist from us, so use what helps you think about your own house and ignore the rest.
A combination boiler heats water as you need it. A system with a cylinder stores hot water separately. Those 2 setups change how a house gets hot water after a new boiler goes in, so it is worth knowing which one you have now if you can see it. You can still call if you are not sure.
Leave the casing on the boiler. Gas work belongs with a Gas Safe registered engineer.
Who we are and where we fit boilers
Timms Gas Services has 17 years of experience and we’re Gas Safe registered, and we’re a Vaillant Master Tech, a Vaillant preferred installer and a Vaillant approved installer, which is how those titles appear on our live site.
We have 115 Google reviews as of November 2026, and we’re open 24/7.
Our base is in Bishop’s Stortford, and we also fit boilers in Harlow. Other focus towns include Sawbridgeworth, Great Dunmow, Epping, Nazeing, Roydon, Stanstead Abbotts, Broxbourne and Hoddesdon. Hertfordshire is named as a county we work across. The live site also names London and Essex as broader regions.
See boiler installation in Bishop’s Stortford or boiler installation in Harlow if you want the local install page.
Other heating work that can sit beside an install
A new boiler is only one part of a heating system. The live service list also includes central heating installations, central heating controls, radiator installs, radiator leaks, thermostats, thermostatic valves, power flushes, and vented and unvented cylinders.
Our plumbing, gas and heating page shows that wider work. We will not invent a process or a finish time here, because those details have not been confirmed for public copy.
If the old boiler has already failed and you are not sure a new one is needed, start with repair or replace your boiler rather than this page.
What to ask about the new boiler
Ask where the new boiler would sit and how the flue would leave the building, how you will get hot water after the change, especially if you’re moving away from a cylinder, and who to call if something doesn’t feel right once the system is back on.
Write the answers down so you can refer to them later.
You can also ask about servicing the new appliance later. How often should you service a boiler explains why many makers want a yearly service.
Don’t ask a blog to price the job, because there is no numbered price list on the public site.
Key takeaways
Read the Energy Saving Trust advice if you want independent background, and check that anyone working on the gas appliance is Gas Safe registered.
Timms Gas Services offers boiler installation from our Bishop’s Stortford base and in Harlow. We’re Gas Safe registered, we have 17 years of experience, and we’re open 24/7.
Call 07935 205813 or use the contact page when you’re ready to talk about the install or to receive a complimentary consultation. The public pages talk about clear and upfront pricing. Registering the installation and the manufacturer’s warranty, then booking in annual servicing to keep it valid.
Who this page is not aimed at
This is not the right choice if the old boiler has just broken down and you still need to decide whether it can be repaired. Call 07935 205813 about the fault first.
It’s also the wrong read if you only wanted the warning signs that a boiler should be replaced. Use the signs you need a new boiler post for that.
Don’t treat this as a promise about how long an install takes or what will happen to your cupboards, floors or decoration. Those details depend on the property.
| Page to read | What it covers | When it helps |
|---|---|---|
| Boiler installation in Bishop’s Stortford | A new boiler in the home town | You live in or near the town |
| Boiler installation in Harlow | A new boiler in Harlow | You live in Harlow |
| Signs you need a new boiler | Replacement warning signs | You are still deciding |
Common questions
Do I need to know what type of boiler I have?
No. You can still call 07935 205813 about a new boiler if you are not sure of the type, because Timms Gas Services offers boiler installation and is Gas Safe registered.
Do you fit boilers outside Bishop’s Stortford?
Yes. We also fit boilers in Harlow. Sawbridgeworth, Great Dunmow, Epping, Nazeing, Roydon, Stanstead Abbotts, Broxbourne and Hoddesdon are on the focus list as well.
Can I stay at home while the work happens?
Ask when you book whether you should be at home while the work happens, and what access will be needed. If you need to be out for part of the day, ask about that when you call.
How do I check an installer is Gas Safe registered?
Ask to see their Gas Safe Register ID and check it on the Gas Safe Register website before work starts. Timms Gas Services is Gas Safe registered. The card should match the person doing the work, and it should cover the gas work they intend to carry out on your boiler.
