Best Gas Boiler | Navien NCB700 54kw Gas Combi Boiler

[@rabihdaou5642]

Thanks

[@AllenHart999]

Thank You.

[@pops6638]

Best Gas Boiler! That is a very tall statement, especially as it’s not been fitted and trialled yet. However, a very smart move regarding KZbin stats. As it’s bound to attract loads of views and comments. The pipe sizes, due to the Kw and length of runs in some properties would leave a lot to be desired! Not to mention meter sizing, if more gas appliances in the property.

[@AllenHart999]

I am asking if its the best combi boiler. I have never installed one so no idea. Thanks.

[@MrCobraRam]

@@AllenHart999 maybe finish a question with a question mark? 😉 I clicked because I thought you were claiming it was the best boiler, which is what the OP was hinting at. This isn’t a brand I’m familiar with but heat inputs are getting silly now with these boilers , u16 meters and new gas main are going to be a cost factor for many customers.

[@johnburns4017]

@@MrCobraRam A U6 meter can take 54kW. This combi needs a dedicated supplies of gas and water back to meter and main stopcock.

[@MrCobraRam]

@@johnburns4017 yes but add a cooker and a fire to that and you’re in trouble 😉

[@markwhittam8744]

Fair enough, but if that’s true then at the very least the video title should have read “Best Gas Boiler?”. There are are a whole load of installers who trust your opinions and I, amongst many others I’m sure, who don’t want to see your views influenced by manufacturers who are throwing free boilers at you.

[@necropig]

without fuelling the fire if this is at all like the navien units you see from youtuber mikeypipes then these will have a massive failure rate. The heat exchangers aren't sealed out of the box then spill and contaminate the combustion chamber

[@shaunconnor7525]

Boilers in the us run at much higher temperatures plus different flueing almost a twin flue system which is rare in this country im no defending navien but if had logics baxi pottertons valliants out the box with loose screws bolts

[@AllenHart999]

I will check him out. Thanks.

[@Lizzard-t]

Mikey pipes Is in a law suite against Navien ,but he didn't do himself many favors by blaitenly calling Navien out on his KZbin channel. Now he's in bed with Worcester. Anyway this Navien combination boiler .what's the dry lift weight of those? Are they as heavy as the Worcesters ? These manufacturers don't make it easy for an installer.thats working on his own trying to lift heavy boilers onto a wall Takes me back to the likes of potterton netaheats

[@robertwootton8313]

Yep follow mikey pipes in new York he absolutely loves them , not !! Korean crap. Promote UK stuff !

[@AllenHart999]

@@Lizzard-t Just spent about 4 hours watching a number of his videos, TBH the guy seems clueless. He is installing boilers and not flushing them and then when they fail he blames the boiler, Also lots of faults are leaks from the flues that someone hasn't installed very well. Things like auto air vents failing, That happens on all boilers when they are installed badly regardless of brand. I cannot watch anymore from him tbh.

[@jockster5525]

Awesome news .I'd certainly have to agree that's a game changer indeed. Thanks again for your efforts 👍😙☺️

[@AllenHart999]

Thanks.

[@anthonyjackson8068]

I have fitted loads and loads of the Navien boilers in the UK and yes, I have heard about those videos. I’m sure I have seen somewhere else that those micro-leakage at the heat exchanger are acceptable within the manufacturing process and industry

[@AllenHart999]

Thank you

[@digitalradiohacker]

Like in this link, where a US plumber has to isolate the unit because it leaked so much gas that the tennants upstairs complained about the smell? kzbin.info/www/bejne/mXK1eniIfderfJY

[@richgas7222]

Great to see you today pal in Sherburn and helmet, thanks for the pic still feel abit star struck 😀

[@AllenHart999]

My mate is an idiot 😂😂 nice to meet you, call in for a coffee when you are passing.

[@richgas7222]

@@AllenHart999 cheers for that! Both top blokes although I did think what's this crank on about when he called me over 😆 take it easy pal I appreciate all the videos that have helped me and many other engineers!

[@mihaiachim5299]

I think I can implement this function relatively easily on Intergas boilers with a recirculation pump (ex: UP COMFORT 15-14BA PM AUTOADAPT from Grundfos ... but you can find other solutions on the market) and some fittings :)

[@AllenHart999]

Would be interested to see that. Thanks

[@mihaiachim5299]

@@AllenHart999 I can easily recreate with brass parts the functionality of the plastic part from the presented boiler; and the management of the pump functionality is done by the automation of the pump that comes with an integrated temperature sensor (there are pumps that have even more advanced functionalities than the one from grundfos - ex: hourly control) or they can use a simpler pump and a dedicated controller to manage hot water recirculation function. I chose the Intergas brand because on hot water it has only an internal coil without water flow switch, and the boiler works on hot water as a storage boiler keeping the heat exchanger preheated :)

[@rognevs5695]

I can see this secondary hws return system being useful in smaller commercial properties, like a few high end offices with no room for a proper plant room

[@AllenHart999]

It’s definitely different that's for sure. Thanks.

[@yensabi]

Nice one Allen , I've never seen one in the flesh so to speak but they seem to get a lot of bad reviews in the states with combustion leakage and other issues so it will be interesting to see what you think about them.... 👍 Cheers

[@AllenHart999]

I cannot comment on how good the boilers are as i have never installed one. YET, Thanks.

[@muzzainoz]

Hi Allen, hope your review of the Navien NCB700 54 kw is getting there? Very much interested in your verdict. Cheers, Murray :)

[@Honest_Reviewer.]

This is very similar to what I call instant hot water. Would you need a return pipe or is this being returned through the cold pipe?

[@AllenHart999]

You connect the hot and cold together at the furthest point. Thanks.

[@alphabuilders]

@@AllenHart999 I thought you connect the hot and cold to the plastic themostatic mixing valve you had, not to each other. Plus you must create a loop with flow and return from which you tee off all dhw demand points. Like a bronze pump on a cylinder only difference piping up is the feed into the system is at farthest point and controlled by that black plastic thingy so as to recirc all the preheated water in before new cold gets into the heat exchanger. The expansion vessel for DHW is a clue that they have had issues with cracks or pinholes in there plastic DHW hydroblocks. Never see them called for on a all brass hydonics boiler let alone chucked in the box. Water hammer from when the hot is slammed closed fast creates huge pressure spikes that the plastic cant stand thousands of times for years. Think of the mass of all the liquid that is moving when we open a tap, it has a lot of momentum energy (mass x speed) which we force into a sudden stop by closing a quarter turn tap for example. Not good for brittle plastics.

[@AllenHart999]

@@alphabuilders sorry, yes you use the plastic part in between the hot and cold, Thanks

[@brendanfisher2528]

You could do this with any combi though couldnt you? Secondary return, with brass pump, tee into cold inlet on the boiler and put a not return further down the cold... could even wire in a pipe stat to control the secondary pump or just a timer... great video alan!

[@AllenHart999]

This has the pump built in and the boiler controls it. Not sure it’s that easy.

[@johnburns4017]

Navien are the biggest combi makers in the world. Big in the USA and Russia. - big markets. Quality products.

[@AllenHart999]

Hi John. Do you install them? Thanks.

[@johnburns4017]

@@AllenHart999 Come across a few. Installed one about three years ago. No feedback. So assume no problems..it was around 30kw. Let us know how it goes. The new 54kW sounds amazing. I will look up the US vid on it. Doing an Intergas Xclusive with solar thermal store preheat and all control gear, such as Solar iBoost.

[@MSClaytonPlumbing]

I’m working on a house with one fitted, where does the hot pump to? Surely it can’t pump out and back on the same pipe?

[@AllenHart999]

Thank You

[@MrCaino33]

im so interested in Plumbing especially these new inventions, sucks that i cant find an apprenticeship in this trade after being at college for 2 years

[@AllenHart999]

Good luck.

[@geotj58]

It's not plumbing! thats maybe why your struggling

[@Mattyyyyy28190]

Hi Allen , I have a question , could you let me know what the difference is between copper push fit and press fit , besides the obvious lol , why do I see everyone using press fit and not really copper push fit? Thanks matt

[@AllenHart999]

One is push-fit and one is a mechanical joint. Thanks.

[@Mattyyyyy28190]

@@AllenHart999 thanks for the reply

[@ivanondov8826]

Hello Allen, thank you for the greatest videos for the Gas industry , Can you recommend me a Boiler Fail Finding Course . Massive thank you👍

[@AllenHart999]

Viva Training have a good fault finding training with Roy

[@dickiedubs3137]

Good video I'm not sure about 54kw puts me off.....kind of the opinion if you need 54kw you should be thinking about a cylinder

[@AllenHart999]

I agree but this could be good in some cases. Thanks.

[@geotj58]

No point having a 54kw combi( note; combi) unless you have 30 ltrs/min coming out of your taps , some of these comments are ridiculous I give up, idiots and or simpletons.

[@Purebeltersteve]

Its a brilliant idea regarding hw, but it just means people are using more gas for secondary return.

[@johnburns4017]

All secondary loops use energy.

[@AllenHart999]

@@johnburns4017 This only takes hot to the taps, It doesn’t really return hot to boiler. Thanks.

[@johnburns4017]

@@AllenHart999 Thx Allen. Never got that. I viewed it too quickly. Sounds clever.

[@Purebeltersteve]

@@AllenHart999 yeah but surely there has to be a preheat option on constantly for secondary return to work

[@geotj58]

It isn't a brilliant idea, it's just a preheat thats been out for over 35 yars

[@keithbrueton]

I agree with what Barang Chamon

[@AllenHart999]

what does it say lol.

[@muzzainoz]

@@AllenHart999- Barang Chamon translation: ?? "All very nice. But first the numbers 10 and 1 together. One brunette and another blonde. It would be unfair if I chose 4"

[@sjbmw1]

Going to buy this unit as the technology sounds good. The American reviews maybe true but it is down to the manufacturing off the unit and the quality control. I hope Navien has addressed these issues and as far as I am aware this company is the only one still developing gas combi boiler so hats off to them. Will update once fitted and running for 3 months through the winter. The recirculation can be programmed to recirc, guess hourly or intelligently ie if your at work during day no need to recirculate. This is a amazing feature as combi boilers will usually have cold water (previously heated) sitting in the hot pipe so when you turn the hot tap on you have to wait for the water to heat up and the distance from the boiler to the tap will determine how long it takes to receive hot water. This little recirc valve save a shed load of water per year. It also has Geo fencing so can turn on the heater/recirc maybe when you're closer to home. Not to sure on this though.

[@raykhan6416]

Your right amazing wow.

[@AllenHart999]

Thank You

[@brendanfisher2528]

Mikeypipes on KZbin in American has had alot of issues with these boilers.. he shows that the main burner seal leaks POC straight out of the box, he sprays LDF around the burner seal and they all leak, it would be worth you checking the burner seal out with some LDF... I have installed 1 before and it was abit confusing with all the dip switches that we needed to set in a certain order but the customer service was great... also they don't have engineers to repair them they pay local engineers or the installer to repair them as far as I'm aware.. I don't know how that recirculation would work as it would be recirculating through the night when it's not needed, burning unnecessary gas...

[@AllenHart999]

I will have a look at some of his videos, I will also make my own mind up after i install this one. Thanks.

[@AllenHart999]

Just spent about 4 hours watching a number of his videos, TBH the guy seems clueless. He is installing boilers and not flushing them and then when they fail he blames the boiler, Also lots of faults are leaks from the flues that someone hasn't installed very well. Things like auto air vents failing, That happens on all boilers when they are installed badly regardless of brand. I cannot watch anymore from him tbh.

[@digitalradiohacker]

@@AllenHart999 That's a comparison of his fitting standards to yours, whereas what the Op is alluding to is a comparison of boilers that don't leak out of the box with Navian.

[@brendanfisher2528]

​@AllenHart999 it's funny because mikey pipes has started fitted worcester bosch, and he LOVES them.. I told him, let's see in a few years when the plastic parts start pinholing and site glass on electrodes breaks lol.. he has it all to come with worcester

[@TheLinkedList]

According the installation docs, it has a primary and secondary heat exchanger - the question is, are they steel or aluminum?

[@AllenHart999]

Stainless Steel i believe but i will need to check. Thanks.

[@TheTonyj30]

he,s holding a piece of plastic ?

[@alphabuilders]

@@AllenHart999 Steel? Hmm sounds like a boiler from the 70s. Uk moved on from steel heat exchangers in small bore domestic plumbing due to the sludge and rust build up. Aluminium is a far better material, stainless steel is the best choice but just plain ole steel?... you must mean stainless steel surely?

[@garyreid3231]

@@alphabuildersHi the heat exchanger is stainless steel

[@julianhawker7672]

Not seen a gas one in the flesh but lots of videos on YT from the stateside techs about all the problems with them.................... I have seen a oil one and don't like it, no industry standard spares and design/construction looks like it will be trouble in the future to me. Not for me at all! as I will stick with tried and tested for my own jobs but interested to see how you get on with it Allen. Cheers. 🙂

[@AllenHart999]

Hi Julian. I need to install it and give an honest review on it. Thanks.

[@ebebop]

Isn’t that against uk water regs to exploit the cold water?

[@AllenHart999]

Never even thought about that, i will ask some questions.

[@tomhilditch3882]

What's the Min modulation?

[@AllenHart999]

Not sure but i believe it was quite low. I will find out and add it in next video. Thanks.

[@Muggles87]

Can fit secondary circulation easily to any combi boiler, been doing it for years, this isn't new

[@nickcannon5592]

I have never heard of this make before. What is the initial cost of the boiler and are spares readily available. As a new install then may be, but as a replacement having to install a secondary return I'm not so sure. Then will you have to increase gas meter size as it uses about 5.13 cubic meters ish per hour. Have to be honest you have right left me hanging, I know you are busy but hurry up with next video. Thank you mate

[@AllenHart999]

Hi Nick. You just connect hot and cold together, actually looks good. I have never installed one though. Thanks.

[@nickcannon5592]

Thank you mate for reply

[@discobiscuits5564]

Not sure if you seen any mikey pipes videos allen ( american hvac technician) but these naviens have had shocking reputation for leaking heat exchangers straight from the box

[@AllenHart999]

I have no experience at all with Navien boilers and i haven’t seen the videos. Have you installed any? Thanks.

[@discobiscuits5564]

@@AllenHart999 no never i only ever fit vaillant tbh allen i know them and i like them, but i have seen a lot of videos on mikey pipes channel where he reckons theres almost a 100% failure rate on the hex leaking combustion gases inside the unit he has a video where they sent him a new boiler which he hung on a wall power cycled it up, sprayed the top of heat exchanger and it was bubbling up which is kind of scary.

[@AllenHart999]

@@discobiscuits5564 I don’t really watch other people on KZbin so I cannot comment tbh. Does the guy look like he knows what he is doing? The reason I ask is I find lots of faults are down to the engineers lack of knowledge

[@discobiscuits5564]

@@AllenHart999 Allen, Mikey Pipes is basically an american version of yourself, he is a quality installer / technician, top of the game. These uk naviens could be completely different setup but anyone who has watched mikey pipes videos will know how badly designed and prone to failure these units are.

[@johnward5006]

@@AllenHart999 He's top of his game, says it the way it is and I've seen a lot of his videos showing the boiler failings. Ultimately, if you want to run multiple outlets, forget about 52kw and concentrate on pressure and flow! A combi is always the least preferred option all things considered!

[@rabihdaou5642]

Brilliant

[@AllenHart999]

Thanks.

[@warriorsofwarmth]

these boilers are superb

[@AllenHart999]

Thanks.

[@annanip97]

Many ppl talking here, but no one mentioned WHERE TO BUY IT?

[@robertwhite4919]

The problem with the US boilers is that you can't take the burner out without removing the main HE. So the burner gasket never gets changed and the nuts are loose from manufacturer, taking the burner out is not part of the US service, plus the majority of parts inside them are not the best, but they do send parts out free of charge.

[@AllenHart999]

Have you personally installed any buddy? Thanks.

[@scottk2765]

This is what surprised me. Have just spoken with a Navien sales rep and I asked about servicing them, he said never need to clean the hex and they don't keep replacement gaskets so if you opened one up they'd have to send a whole new heat exchanger out.

[@CrashUK28]

problem would be you need a extra pipe work for this system to work.

[@AllenHart999]

No you don’t. Just connect hot and cold together. Thanks.

[@tigerick7291]

54 kw! Would it be ok on a 15m run of 22mm gas pipe?😂

[@mrserviceman8795]

Navien yeah seen lots about them from American installer Mikey pipes Have problems with leaking products of combustion inside boiler from new But they as all manufactures will not accept liability You need to watch his KZbin channel eye opener

[@AllenHart999]

I will do. Thank you.

[@AllenHart999]

Just spent about 4 hours watching a number of his videos, TBH the guy seems clueless. He is installing boilers and not flushing them and then when they fail he blames the boiler, Also lots of faults are leaks from the flues that someone hasn't installed very well. Things like auto air vents failing, That happens on all boilers when they are installed badly regardless of brand. I cannot watch anymore from him tbh.

[@ivandrozd5754]

I would stick to the known budget boilers like Main, Glow worm...

[@Swwils]

What size house needs 54kw

[@AllenHart999]

A big one.

[@Swwils]

@@AllenHart999 54kw will do like 50 bedroom.

[@geotj58]

Gimmick that doesn't work, on a secondary cylinder return it has just that , a return, so hot water is pumped to the furthest taps on a loop system even if it's a mile away, so turn tap on instant hw( totally fuel waste) on a combi with hw we don't have a loop system( and it wouldn't work) so this is basically a recycled pre heat within the boiler and as with all combis in the world if you a mile away you wait! noticed on the sales pitch for this boiler it quote 'can deliver hot water up to three bathrooms' enough said! try doing that with 8ltrs/min

[@jezzaandrews1940]

Why are people hung up with the 54KW? If you have adequate water flow and gas, this boiler will save you heating up 100's litres of water stored in a tank and not used. If it produces 22 litre a min, you could have 3 showers going at the same time. Never run out of hot water. The heating side is only capable of 34KW and can modulate down to 3.4KW. 10.1 The hot water has a 15.1 modulation range. A Vaillant Ecotec has a 6.1 modulation range? They might be good or bad boilers, but I'm sure that different manufacturers will learn from the different tech and copy some of their ideas.

[@k20aa]

See what the pipe doctor says about them in America Mikey pipes 👍👍

[@AllenHart999]

I will have a look at some of his videos, I will also make my own mind up after i install this one. Thanks.

[@AllenHart999]

Just spent about 4 hours watching a number of his videos, TBH the guy seems clueless. He is installing boilers and not flushing them and then when they fail he blames the boiler, Also lots of faults are leaks from the flues that someone hasn't installed very well. Things like auto air vents failing, That happens on all boilers when they are installed badly regardless of brand. I cannot watch anymore from him tbh.

[@k20aa]

@@AllenHart999 Did you see where the heat exchanger burner gaskets leaks combustion and ruins the electrics pcb etc . And the plastic components breakdown . Each to there own I think people will regret fitting those boilers . They belong in b&q for diy idiots that want to pay peanuts

[@SuperTrooper9000]

As a breakdown engineer I can confirm that parts are not readily available for Navien boilers hence I tell all customers to avoid them.

[@julianwebb8712]

Where are these manufactured ?

[@johnward5006]

South Korea

[@AllenHart999]

South Korea i believe

[@xx-cd1bs]

Watch Mike’s pipes in America , navien is very popular in America

[@johnburns4017]

Many US vids laud the Navien. Far more than that slagged it.

[@AllenHart999]

I have never watched any, I need to i think. Thanks.

[@Richard-ct4ok]

In your opinion, many others will disagree

[@AllenHart999]

I haven’t given an opinion on the boiler itself, Just the technology. The idea of a second return sounds amazing.

[@MrMarco3]

Mikey Pipes would STRONGLY disagree and fromwatching his videos so would i, dont want these boilers anywhere near the UK. Wall Hung Junk

[@brendanfisher2528]

Yeh mikey pipes hates navien.. but loves worcester bosch... he had yet yo learn about there leaky plastic parts and poor burner seal on the kebab Main heat exchangers lol...

[@alanbrown403]

Yeah totally agree about MP but he loved them for years and installed them as they were cheap and mode him a lot of money. He now hates them and is in litigation with them. He now thinks Worcester Bosh is the in thing but it is just a CDI version and still has the glass window on the electrodes which we all know Worcester wants us to change to stop them blowing out the glass and demolishing the casing. Can’t take him too seriously as he jumps from one great product to the other. Supposedly!!!!

[@AllenHart999]

Thanks.

[@christopherkirkland8455]

Hi I've been fitting navien for over 5 years. We service them and any issues we sort out but there hasn't been many and nothing To do with the heat exchanger. Our customers love them and comment about how good they are when we return for the service.

[@AllenHart999]

Just spent about 4 hours watching a number of his videos, TBH the guy seems clueless. He is installing boilers and not flushing them and then when they fail he blames the boiler, Also lots of faults are leaks from the flues that someone hasn't installed very well. Things like auto air vents failing, That happens on all boilers when they are installed badly regardless of brand. I cannot watch anymore from him tbh.

[@tomearnshaw8532]

Allan watch Mikey pipes on you tube about navien heat exchangers have a high failure.

[@AllenHart999]

Just spent about 4 hours watching a number of his videos, TBH the guy seems clueless. He is installing boilers and not flushing them and then when they fail he blames the boiler, Also lots of faults are leaks from the flues that someone hasn't installed very well. Things like auto air vents failing, That happens on all boilers when they are installed badly regardless of brand. I cannot watch anymore from him tbh.

[@tomearnshaw8532]

@@AllenHart999 ok but the failure rate seems quite high. I know some have install problems but gas leak on a new boiler heat exchanger is not good. Anyways time will tell. Good luck.

[@AllenHart999]

@@tomearnshaw8532 Have you personally seen any faults buddy? I am not convinced with mikey pipes tbh,

[@tomearnshaw8532]

@@AllenHart999 hi Allen I’ve been watching this for a long time a brand new boiler out off the box had a leaky heat exchanger where it bolts onto flu hood. Maybe caskets. And faulty rubbers on exit from boiler flu going hard and then getting cross contamination which causes overheating and then the plastics start dripping looks like oil.

[@tomearnshaw8532]

But to be fair it’s only vids I’ve seen.

[@plumbertime]

54 kw combi 😂 who needs that! Better get your commercial gas ticket out. (Gas run) what’s the energy efficiency rating. Do you have to run a secondary. Need a lot more info to be fair

[@AllenHart999]

The whole point of it is that you do not need a secondary return but this means you have one, Very little pipework changes. Thanks.

[@Heatingandplumbing1]

Why would you need a 54kw combi? you could run 45 bed house on central heating on that boiler. Totally oversized for UK domestic market , even for your larger 6 to 8 bed. with modern technology we don't need massive beasts anymore. no chance your average installer is going range rate the boiler to the heat loss of the property and its going to cycle like a b#tch. Not a go at you Allen, cheers Rob

[@AllenHart999]

Hi Rob. Hope you are well buddy, I am very happy for you to give your opinion. The secondary return is the main thing for me as i don,t know of any other boilers with that. Thanks.

[@johnburns4017]

The 54kW modulates down to around 3.6kW. 25 to 1 modulation, cycling not a major problem. On weather compensation it will work well. *No tanks or cylinders needed.* Needs a dedicated 22mm cold mains supply direct from the main stopcock to work well. As with most combis.

[@ML-lg4ky]

They sell those POS here in the states too. They end up in the dumpster after 4-5 years

[@AllenHart999]

What does POS mean? Thanks.

[@muzzainoz]

@@AllenHart999 I think he's implying "piece of shit" so I'd like to see the proof for this opinion!

[@mihaiachim5299]

I really hate boilers with glass front cover ... another thing you can ruin during maintenance when you're tired and not as careful… :D

[@AllenHart999]

Thanks.

[@davidstock480]

How much

[@AllenHart999]

i was sent it for free

[@efrygasservices6169]

54kw!? Wow! 42mm from the meter then 😂😂😂

[@AllenHart999]

Need to move meter and put it next to boiler lol.

[@edc1569]

How much do they pay for you to say its the "best"

[@AllenHart999]

One million dollars. If you watch the video though you will see I haven’t said they are the best,

[@MrMarco3]

Watch Mikey Pipes Allen, hundreds of videos on how bad these are

[@AllenHart999]

Will do. Thank you.

[@AllenHart999]

Just spent about 4 hours watching a number of his videos, TBH the guy seems clueless. He is installing boilers and not flushing them and then when they fail he blames the boiler, Also lots of faults are leaks from the flues that someone hasn't installed very well. Things like auto air vents failing, That happens on all boilers when they are installed badly regardless of brand. I cannot watch anymore from him tbh.

[@garyreid3231]

Many boilers have issues and 99% of the time it's installers errors. Not Boiler!

[@AllenHart999]

Hi Gary. Have you installed them? Thanks.

[@garyreid3231]

@@AllenHart999 Hi Allen yes the older models , but not the New Range yet . There back up is the Best in the industry from my experience and it's normally not the boiler that is at fault . I also fit that Oil range of Boilers they have a 10 year warranty and comes standard as Blue Flame and 2 stage Hi and Low burner pressures. Easy to handle due to there weight.

[@harvdub9904]

Navien many issues I wouldn't install them

[@AllenHart999]

I will give an honest opinion when i install it. Thanks.

[@johnburns4017]

Name the issues.

[@MrRawMonkey]

Worst boiler ever according to reviews in America. Spare parts? Forget it

[@AllenHart999]

Thanks.

[@toecutter6968]

Junk from what I’ve seen and heard.

[@AllenHart999]

Why? Thanks.