When your boiler gives up, especially in the middle of a cold London spell, getting a replacement becomes a top priority. And naturally, the first thing most homeowners want to know is: “How long will the installation actually take?”
At Maintracts Services Ltd, we make new boiler installations in London as quickly and seamlessly as possible. Whether you’re replacing an old unit with a similar model or switching to a completely different system, this guide breaks down the installation timeline, what affects it, and how we ensure everything goes smoothly with minimal disruption to your day.
Need fast help from trusted heating specialists? Call 020 8131 9985 or email info@maintracts.co.uk to get started.
“Need heat and hot water back fast? Our engineers handle every step of your boiler installation efficiently without ever cutting corners.”
What Affects How Long A Boiler Installation Takes?
Most new boiler installations in London take between 1 and 3 days, but several factors can change that timeline. Here’s what makes the biggest difference:
1. Type Of Boiler Being Installed
The type of replacement plays a huge role:
- Combi to combi swap:
- The quickest and simplest option is usually done within a single day.
- System or regular boiler to combi conversion:
- Requires more work (removing water tanks, adjusting pipework). Typically 2–3 days.
- Relocations or full upgrades:
- Moving the boiler to a new area or changing the system type adds time and complexity.
2. Condition Of Your Existing System
Older or poorly maintained heating systems can create extra steps:
- Upgrading pipework
- Flushing radiators
- Powerflushing to clear iron oxide buildup
To avoid surprises, our engineers always carry out a detailed assessment beforehand. This helps streamline the boiler replacement timeline.
3. Location & Access
A boiler tucked away in an awkward loft or cupboard naturally takes longer to replace. Complicated pipework routes and flue adjustments also extend the installation duration.
Step-by-Step Boiler Installation Timeline
Here’s what typically happens during a new boiler installation:
1. Pre-installation Survey
Before the big day, we carry out a full assessment to confirm:
- The right boiler size and model
- Any safety concerns
- What upgrades (if any) are needed
This step ensures your installation runs smoothly and quickly, often allowing for true same-day boiler installation in London.
2. Removing the Old Boiler
Taking out your existing unit usually takes 2–4 hours, depending on access and condition. We then safely and responsibly dispose of it.
3. Pipework, Filters & Heating Connections
Next, we:
- Install filters and valves
- Adjust or upgrade pipework
- Connect the boiler to your heating and hot water system
This is often the most time-consuming stage, especially when converting from a regular or system boiler to a combi.
4. Gas Safe Installation & Testing
Safety first, always.
Our Gas Safe engineers install your new boiler to full UK safety standards and thoroughly test:
- Gas pressure
- Fittings and connections
- Control system functionality
5. System Commissioning
We balance your radiators, fine-tune settings, and ensure everything is working as efficiently as possible.
6. Demonstration & Handover
Before leaving, we walk you through:
- How to use your boiler
- Thermostat controls
- Timer settings
You’ll also receive your warranty documents and Gas Safety Certificate.
How We Keep Disruption to a Minimum
At Maintracts, we’ve refined our boiler installation process over decades. Here’s how we keep your home running as normally as possible:
- Clear communication from start to finish
- All materials are prepared in advance
- Quick troubleshooting
- Clean, professional workmanship
We also support landlords with compliant, smooth landlord boiler installations in London.
Additional Factors That Influence Installation Time
1. Regulations & Safety Requirements
Modern boilers must comply with strict regulations. This may include installing:
- New condensate pipes
- Flue extensions or kits
- Pressure-reducing valves
These steps add time, but they’re essential for long-term reliability.
2. Optional Upgrades
Enhancements such as:
- Smart thermostats
- Magnetic filters
- Zoned heating controls
Can extend the project slightly but offer significant efficiency benefits.
3. System Relocation or Type Change
Moving your boiler or switching to a different system type may require:
- Lifted floorboards
- Additional wiring
- Changes to drainage routes
These adjustments naturally increase the installation timeframe.
Estimated Timelines By Boiler Type
| Boiler Type | Estimated Time |
|---|---|
| Combi to combi (same location) | 1 day |
| System to combi conversion | 2–3 days |
| Boiler relocation (any type) | +1 day |
| Full heating system upgrade | 3–4 days |
If you’re considering future-ready options, our guide to electric boiler installation in London explains the benefits and expected timelines in more detail.
How To Prepare For Installation Day
A little preparation helps speed things up:
- Clear access to the boiler area
- Ensure someone is available for entry
- Move valuables or fragile items
- Let us know about pets or specific access needs
A smooth setup means a smoother installation.
What Happens After Installation?
Once the installation is complete, we:
- Register your boiler warranty
- Provide your Gas Safety Certificate
- Offer guidance on servicing and maintenance
For homeowners planning ahead, our full guide to home boiler installations in London offers practical budgeting and system advice.
Conclusion
So, how long does boiler installation take? In most cases, it takes between 1 and 3 days, but that depends on your current system, the type of upgrade, and any additional work required.
At Maintracts Services Ltd, we’ve spent decades delivering fast, safe, and efficient boiler installations across London. Whether you’re upgrading to a combi, switching to electric, or managing installations across multiple properties, we’re here to help.
Call us today on 020 8131 9985 or email info@maintracts.co.uk to book your survey or request a free quote.
FAQs
1. How long does a standard boiler installation take?
A like-for-like combi swap in the same location usually takes one day.
2. Can I get emergency boiler installation in London?
Yes, same-day installation is available, depending on the engineer's availability and system requirements.
3. Will I need a heating system upgrade?
Not always, but older systems may benefit from modern upgrades for efficiency and reliability.
4. Do you install boilers for landlords?
Absolutely, we handle landlord boiler installations in London and ensure full compliance.
5. Do you install electric boilers too?
Yes, we do. Our electric boiler installation guide covers benefits, suitability, and timelines.