The ESP1 is Ideal’s straightforward combi. Ideal builds it mainly for new builds and social housing, so you won’t find extras like a long warranty or app control. What you do get is a light, compact UK-made boiler that’s simple to use and easy for an engineer to service. See your fixed price in our online quote.
Key specs
| Spec | Logic Combi ESP1 35 |
|---|---|
| Boiler type | Combi, condensing, wall mounted |
| Fuel | Mains gas |
| Central heating output | 24.2 kW (25.6 kW at a 40°C mean) |
| Modulation | Down to 7.1 kW |
| Hot water output | 35.3 kW |
| Hot water flow rate | 14.5 l/min at a 35°C rise |
| Efficiency | 94% seasonal, A-rated for heating and hot water |
| NOx class | Class 6 |
| Sound power (indoors) | 44 dB |
| Installation weight | 29.1 kg |
| Max horizontal flue | 9 m |
| Manufacturer warranty | 2 years (register within 30 days, service every year) |
Who is it for?
Go for the 35 if two showers often run at once, or if you just want the strongest flow in the range. It gives 14.5 litres a minute. The heating side is the same 24.2 kW as the smaller models, so it won’t heat a bigger house any better. You’re paying for hot water, not extra radiators.
The ESP1 comes in 24, 30 and 35. All three give the same heating output. The number is the hot water output, so pick the size by how much hot water your home uses.
Why would you pick an ESP1?
Mostly because it’s simple. There’s a pressure gauge you can read at a glance, a back-lit display and a built-in filling loop, and that’s about it. If you’re a landlord, or you just want a reliable replacement without paying for features you won’t use, it makes sense.
The trade-off is the warranty. Ideal gives 2 years. If a longer warranty matters to you, the Logic+ range comes with 7.
FAQs
Is the ESP1 a good boiler?
It’s a solid, basic combi from a big UK manufacturer. It’s A-rated and Energy Saving Trust endorsed. It just doesn’t come with the longer warranty of Ideal’s other ranges.
What’s the difference between the ESP1 24, 30 and 35?
Hot water. They all heat your radiators at 24.2 kW, but hot water flow goes up from 9.9 to 12.4 to 14.5 litres a minute.
Can I add weather compensation?
Yes. Ideal sells it as an optional add-on, and the boiler works with a wide range of timers.
Get your fixed price online
Answer a few questions about your home and you’ll see a fixed installed price straight away. If the ESP1 isn’t the right fit, the quote will show you what is.