Navien NCB 40 Combi Boiler Review The Ideal High Performance Upgrade for Larger Homes in Horsham and Adur Districts May 24, 2017 The Navien NCB 40: Because Having No Hot Water is for Peasants. By Andrew Tyler, Prime Boiler Care Hello. I’m Andrew Tyler from Prime Boiler Care. I spend my days crawling through lofts and poking around under sinks across Horsham and the Adur District, fixing things that have gone "bang" in the night. And today, I want to talk to you about a boiler. Now, I know what you’re thinking. "Andrew, it’s a white box that lives in the cupboard and makes a humming noise. Why should I care?" Well, you should care because most boilers are about as exciting as a documentary on damp. But then there’s the Navien NCB 40. And this... is not just a boiler. Power! If you live in a proper house in West Sussex—the kind with multiple bathrooms and children who think a shower should last forty-five minutes—you need power. Most combi boilers whimpering in the corner of a kitchen would have a nervous breakdown the moment someone turned on a second tap. Not the Navien. It delivers hot water at a rate of 16.37 litres a minute. To put that in perspective, that’s enough to power a small car wash. You can have a shower in one bathroom, your spouse can be doing the dishes in the kitchen, and the boiler won’t even break a sweat. It has a "turn-down ratio" of 10:1, which means it can modulate from a massive 40kW right down to a gentle 4kW. It’s like having a supercar engine that’s also happy doing 20 mph through a school zone. The Engineering Bit Inside, it’s not made of plastic and rubber like some of its rivals. It’s all brass and stainless steel. It’s got a Grundfos pump—the Rolls-Royce of pumps—and the heat exchangers are built to last longer than the current government. And then there’s the clever stuff. It comes with an OpenTherm Wi-Fi smart thermostat. Most thermostats are just "on" or "off." They’re binary. They’re stupid. This one actually talks to the boiler. It negotiates. It tells the boiler exactly how much heat is needed, so you aren't wasting gas like you're trying to heat the entire South Downs. The highlights: * Efficiency: 96%. It’s so efficient it’s practically making savings while you sleep. * Silence: At 52 dB, it’s quieter than a library. You could mount it next to your bed and you’d still hear a pin drop. * Flexibility: The flue can run for 20 metres. You could practically install the boiler in your neighbor's house if you really wanted to. * Warranty: 7 years. That’s seven years of not worrying about why the radiators are cold. The Verdict Whether you’re in Horsham, Billingshurst, or Shoreham-by-Sea, you don't want a boiler that’s "adequate." You want one that’s over-engineered, incredibly clever, and capable of melting your face off with hot water whenever you demand it. The Navien NCB 40 is, quite simply, the best way to turn gas into happiness. It’s robust, it’s brilliant, and it’s the one I’d put in my own house. Andrew Tyler of Prime Boiler Care: Fixing the world, one boiler at a time.