Both ATAG and Intergas make excellent boilers, but they serve different needs. You'll find ATAG leads with higher efficiency (94%), premium features, and an impressive 12-18 year warranty, making it ideal if you want top-tier performance. Intergas shines with its simpler design, fewer moving parts, and reliable 2-in-1 heat exchanger system, perfect if you value straightforward dependability. Your ideal choice depends on whether you prioritise advanced features or streamlined reliability. Let's explore what makes each brand unique.
Key Takeaways
- ATAG leads with higher customer satisfaction scores and a superior 4.8/5 Trustpilot rating compared to Intergas.
- ATAG offers broader power options (24-40kW domestic, up to 960kW commercial) versus Intergas's limited range (20-36kW).
- ATAG provides a longer standard warranty of 12 years (extendable to 18), while Intergas warranty information is limited.
- Intergas boilers feature fewer moving parts (only 12 components), potentially leading to lower failure rates and maintenance needs.
- ATAG achieves slightly higher efficiency (94% vs 93%) and features the lowest NOx emissions in Europe.
Company Heritage and Market Presence
While ATAG and Intergas both hail from the Netherlands, they've taken different paths to success in the UK boiler market.
ATAG, founded in 1948, started with gas appliances before finding its niche in heating. You might know them as "the engineer's boiler" – a nickname they've earned through their precision engineering and quality builds.
Since joining the Ariston Group in 2014, they've expanded their reach with popular models like the IC27+ and IC39+ Economiser Plus.
Intergas has made its mark by keeping things delightfully simple. They're known for designing boilers with fewer moving parts, which means less can go wrong.
Their innovative 2-in-1 heat exchanger system has caught the attention of efficiency-conscious homeowners.
Both brands have strong Trustpilot ratings and compete with industry giants like Worcester Bosch, though ATAG edges ahead with customer satisfaction scores second only to Ideal Heating.
Our ATAG boilers guide provides comprehensive information about their complete product range and specifications.
Technical Specifications and Design Features
Beyond their impressive heritage, both ATAG and Intergas showcase some fascinating technical innovations that set them apart.
You'll find ATAG's stainless steel OSS heat exchanger comes with a reassuring 5-year warranty, while Intergas takes a different approach with their clever dual aluminium design that uses fewer parts (and fewer parts means less can go wrong!).
When it comes to power options, you've got plenty of choices. ATAG offers domestic boilers from 24kW to 40kW, and if you're looking for something bigger, their XL commercial range goes up to a whopping 960kW.
Intergas keeps things focused on home solutions, with models from 20kW to 36kW.
Both brands have embraced smart technology too. ATAG's built-in ONEZone controller lets you manage your heating from your phone, while Intergas offers an optional RF module if you want to add smart features later.
Energy Efficiency Performance
Numbers tell a compelling story when comparing ATAG and Intergas's energy efficiency ratings. ATAG leads with an impressive 94% efficiency rating, while Intergas follows closely at 93%. If you're looking to minimise those eye-watering energy bills, both brands won't disappoint.
When selecting a replacement boiler system, considering your property type and heating needs is crucial.
ATAG's built-in Passive Flue Gas Heat Recovery System gives it a slight edge, especially when paired with their smart controllers that can boost efficiency up to 98%.
You'll appreciate these key efficiency features from both manufacturers:
- ATAG's weather compensation comes standard, adjusting your heating based on outdoor temperatures
- Intergas's innovative 2-in-1 heat exchanger keeps things running smoothly with fewer parts
- Both brands achieve significant energy savings compared to older boilers
While ATAG claims the title of Europe's most efficient boiler, Intergas's simpler design might save you money in the long run through reduced maintenance costs.
Your actual savings will depend on your home's characteristics and how you use your heating.
Product Range and Versatility
Both ATAG and Intergas offer impressive product lineups, but they take different approaches to meet your home heating needs.
ATAG gives you more variety with their range of combi, system, and regular boilers. You'll find options from 12 kW all the way up to 40 kW, plus some seriously powerful commercial units that can reach 1.1 megawatts – enough to heat a small village!
Intergas keeps things wonderfully simple. They've focused mainly on combi boilers, with some system options thrown in.
What's really clever is how they've stripped down their design to just 12 components and 4 moving parts – that's like having a sports car with half the parts that could go wrong.
Both brands offer flexible installation options thanks to their compact sizes and detailed flue solutions.
While ATAG's range is broader, Intergas's simplified approach might be just what you need if you're looking for straightforward reliability.
Our main boiler guide provides additional insights into various heating solutions available in the market.
Customer Reviews and Satisfaction Ratings
Real-world customer feedback paints an interesting picture when comparing these two brands.
ATAG boasts impressive ratings with a 4.8/5 on Trustpilot, where 98% of customers give them either 4 or 5 stars. You'll find that 96% of ATAG owners are either satisfied or very satisfied with their boilers.
Intergas, while still maintaining decent satisfaction levels, shows slightly lower numbers. Their unique selling points have earned them some loyal followers, particularly when it comes to their innovative 2-in-1 heat exchanger.
Key satisfaction highlights for both brands include:
- ATAG's exceptional after-sales service and warranty support
- Intergas's simplified design with fewer moving parts
- Both brands' high marks for efficiency and performance
While ATAG edges ahead in overall customer satisfaction, Intergas holds its own with practical engineering that many homeowners appreciate.
If you're weighing these options, remember that both brands have proven track records – it's just that ATAG's customer service seems to give them the upper hand.
Installation Requirements and Support
A key difference emerges when you're looking to install these boiler brands. While ATAG requires certified installers for both purchase and installation, you can have any Gas Safe registered engineer install your Intergas boiler.
When it comes to space requirements, both brands are relatively compact, but you'll need to guarantee 210mm of working space above your ATAG boiler for the flue system.
The good news is neither brand needs special ventilation, and both are suitable for bathroom installations.
If you run into trouble, both manufacturers offer dedicated support. ATAG provides a free hotline (0800 680 0100), while Intergas can be reached at 01527 888000.
You'll also find helpful online resources from both companies.
For warranty coverage, you'll need annual servicing regardless of which brand you choose.
Just remember that ATAG requires certified technicians for repairs, while Intergas allows any Gas Safe registered engineer to do the job.
For more detailed information about specifications and requirements, check out our Intergas boilers guide in our comprehensive categories section.
Maintenance Costs and Parts Availability
When comparing maintenance expenses between these brands, you'll find ATAG's costs are clearly defined but potentially higher upfront.
Their annual service runs £134, including water filter replacement, but you'll benefit from an extensive 14-year warranty that covers parts and labour.
Parts availability varies greatly between the two brands. ATAG maintains strict control through authorised dealers, while Intergas may offer broader access.
Here's what you need to know about parts and maintenance:
- ATAG offers next-day delivery on common spares and provides detailed schematics for accurate part identification
- Intergas boilers have fewer components, which could mean simpler maintenance and lower repair costs
- Both brands require annual servicing to maintain warranty coverage
While ATAG's maintenance costs are transparent, Intergas's simplified design might save you money in the long run.
Just remember, you'll need authorised technicians for both brands to keep your warranty valid.
Environmental Impact and Emissions
Beyond maintenance considerations, environmental responsibility stands out as a key factor in modern boiler selection.
When it comes to emissions, ATAG takes the lead with its ultra-low NOx emissions – they're actually the lowest in Europe. If you're keen on reducing your carbon footprint, you'll appreciate that ATAG boilers help meet the government's SAP 3 & 4 carbon reduction targets and earn 3 BREEAM star points for NOx reduction.
Both brands shine in the efficiency department. ATAG's 'A' Series boilers achieve up to 98% efficiency in heating mode and 95% for hot water. Their 'Q' series can even reach 110% efficiency at lower temperatures – yes, that's possible!
Intergas keeps things simple with their innovative 2-in-1 heat exchanger system, while ATAG opts for durable stainless steel exchangers.
Both manufacturers also offer smart thermostat compatibility and solar integration options, so you're future-proofed either way.
Warranty Coverage and After-Sales Service
Since reliable warranty coverage often makes or breaks a boiler purchase decision, let's examine what these manufacturers bring to the table.
ATAG stands out with an impressive standard 12-year warranty that can be extended up to 18 years with their Complete Care Pack.
ATAG's extensive coverage includes:
- Parts and labour protection
- Access to their weekday helpline (0800 680 0100)
- Annual servicing requirements to maintain coverage
While we can't make direct comparisons due to limited information about Intergas's warranty terms, we do know that ATAG's coverage comes with some strings attached.
You'll need to stick to professional servicing and replace water filters as required – but that's pretty standard for maintaining any quality boiler.
If you're considering ATAG, keep in mind you'll need to work with their registered fitters, which some customers note can be tricky to find in certain areas.
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