Navien Services

Navien Services Near RI

Kwik Plumbing and Heating Inc.’s heating technicians have been installing and repairing Navien equipment for over 13 years.  Other companies heating technicians will tell you they can install Navien equipment.  They most likely can install Navien equipment but there is a very big difference between being able to to install it and being able to install it correctly. If a Navien boiler is not installed the way that they recommend and corners are cut to reduce the price of installation it will not run at the high efficiency its capable of which is how you can save money on your fuel bill and also it will not last half as long as it could.  We always install the Navien product exactly the way they recommend which helps you get the most out of the equipment for many years into the future. If you have any questions at all about the Navien equipment please feel free to contact us through the live chat feature by clicking the white bubble in the bottom right corner of this page and you will speak with a RI Master Pipefitter that is a Navien Certified Specialists that has been installing and repairing them for over 13 years. You can also fill out the contact form on the contact page or call us direct at 401-639-1047.


Navien High Efficiency Combi Boiler and Water Heater
Dual stainless steel heat exchangers for heating

Durable stainless steel heat exchangers resist corrosion, resulting in longer life and improved heat recovery from flue gases for superior efficiency.

Up to 5.4 GPM @ 70°F temperature rise for DHW

Separate stainless steel flat plate heat exchanger for DHW creates the lightest flow rates for any combi-boiler in the industry.

Low noise levels

Installations in or near media rooms, recreation rooms or any living areas of the house are possible with the quiet running NCB-H combi-boilers.

Built-in DHW module now with higher performance

Navien’s NCB-H generates enough hot water to run up to 3 showers and a dishwasher at the same time.

Watch video below to learn more about the Navien NCB-H combination Boiler and Water Heater

Available Models:
– NCB -190/060H
– NCB – 190/080H
– NCB – 240/110H
– NCB – 240/130H
– NCB – 250/150H


Navien High Efficiency Tankless Water Heater

Watch video below to learn more about the Navien NPE-S2 tankless water heater

Navien Services & General Information

Navien boiler, Navien Combi and Navien tankless water heater annual service which includes descaling chemical to flush the heat exchangers and cleaning of all filters. ( This should be done on any tankless boiler only, combi or tankless water heater that condensates no matter which brand name)

Important information you should know about your Navien equipment

Navien annual service which should be done on both the Navien Combi and the Navien tankless water heater. This is a full service including flushing the heat exchanger with descaling chemical and cleaning all filters and condensate trap. Please read description below for a full description.

Navien annual Service

Navien combi boiler and water heater annual service includes:
– Flushing of the space heating heat exchanger which is what heats up the water that goes through your baseboard’s to heat your home. This is done with a descaling chemical. After pumping the chemical in a loop from a bucket through the system then back into the bucket for a certain amount of time we then shut off the pump and the valves putting them back the way they were when in normal operation.

–  Flushing of the plate heat exchanger which is responsible for heating up your domestic hot water for your shower, faucets etc. This is done with a descaling chemical. After pumping the chemical in a loop from a bucket through the system then back into the bucket for a certain amount of time we then drop the pump into a clean bucket of just water to flush the chemical out of the system.

– Clean domestic hot water filter

– Clean air intake filter screen

– Clean Condensate trap

– Remove cartridge from NaviClean magnetic filter and clean off debris thoroughly. Reinstall cartridge and pressurize filter housing.( This is done only if NaviClean magnetic filter is installed on the system )

– Clean filter on space heating piping

– Turn all valves back on. Power up Navien and let it run for a few minutes so the Navien can let us know if there is any air in the system.

– . We then start and test the system. First testing the space heating making sure all heating zones are working. Then we test the domestic hot water making sure it turns on and off when its supposed to. Make any temperature setting adjustments if needed.

Optional Navien Accessories

Does your Navien Combi boiler have a Navien manifold with required valves and hose connections to properly flush your Navien during a annual service? The picture below is of a Navien manifold. This is the newer style which is stainless steel. The older style one is in copper but looks similar and does the same thing.

The Navien Manifold is required when performing the flushing of the heat exchangers with descaling chemical. Navien highly recommends this is done yearly by a skilled heating technician. Sometimes installers leave this out to save money on the installation so that they can either make more profit or so that they can offer the customer a lower install price without the customer knowing that they are cutting corners on important parts that are needed on the installation.  

This manifold has shut offs to isolate the heat exchanger and hose connections to hook up a pump and a discharge hose. This is so that a descaling chemical can be pumped directly into the Heat Exchanger and then back out with out going through the rest of your heating system. Because the unit condensates is causes scale build up inside the heat exchangers. This scale is what causes corrosion from the inside out. When the unit starts to scale really bad you will see a white crust at the seems and this scale will also destroy all sensors and mechanical moving valves like your 3-way valve. This is why Navien highly recommends this service is done annually to protect your Navien equipment. When you have a Navien Combi you have two heat exchangers. One is for your space heating and the other is for your domestic hot water. The space heating one is the larger of the two and needs to be flushed longer.

Without this Navien manifold this service of flushing the heat exchangers with descaling chemicals can not be done. This is why its important to find out if you have the manifold or you can also have valves and hose connections installed on the piping by a licensed professional. This service should be done on any high efficiency equipment that condensates weather its Navien or not.

If you do not have this manifold or the valves and hose connections and have never had this service done with your equipment then contact us if you would like to start properly maintaining your equipment so it lasts 10x longer then when you are not properly maintaining it. Contact us through the live chat by clicking the bubble in the bottom right corner of this screen or call us any time at 401-588-9794 or email us at

Navien High Efficiency Combi Boiler and Water Heater
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Navien’s NCB-H generates enough hot water to run up to 3 showers and a dishwasher at the same time.