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★★★★☆

“Intergas boilers”

written by Lardy1uk on 21/05/2016

Intergas a Dutch boiler manufacturer are becoming increasingly popular amongst many in the domestic boiler installation industry.

Intergas use a Bi-thermic (I think that is the correct tech' name) heat exchanger which means that the combination boilers do not use a water to water plate exchanger and any associated divertor valves.There are pro's and con's to both methods.

Contrary to what some might have you believe (?) this is not new. Potterton, Gloworm, Ferroli, Ravenheat to name but 4 manufacturers, were using these types of heat exchanger long before Intergas were importing boilers into the U.K. Ferroli are still manufacturing a combination boiler boiler with a Bi-thermic heat exchager . The Ferroli Modena.

This type of heat exchanger that negates the need for a plate exchanger means that the boiler only has four moving parts, which are
1) The combustion fan
2) The gas valve.
3) Hot water flow switch
4) circulating pump. It should be noted that the circulating pump does not run on the Intergas when the boiler is in the hot water mode.

The Intergas heat exchanger is constructed from ally, but with a difference. System water never comes into contact with the ally, which is probably unique (?) amongst boiler manufacturers that use ally heat exchangers. The Intergas heat exchangers use 22mm (dia) copper tubing for the heating or primary circuit of the heat exchanger and 10mm or 12mm (?) copper tubing for the domestic , hot water circuit. This copper tubing is than en-cased in the ally during manufacture, so as you can see or conclude, water is never directly in contact with the ally part of the heat exchanger.

This heat exchanger is probably the only heat exchanger fitted to a domestic boiler that can with stand dry firing i.e the boiler could be lit with no water in it & the heat exchanger would not suffer any adverse effects.

Contrary to what some might say , there is one documented example of heat exchanger failure or fault, but this was due to a manufacturing defect that got past there quality control department.

The combination boilers can be installed on an open vented system or a sealed system , they can also be used as instantaneous hot water heaters only i.e radiators ect do not need to be connected to the boiler. hence the ability to be able with stand dry firing, and the ability to produce hot water with out the circulating pump running.

There have been some complaints from installers that there after sales was not up to scratch ? but as I under stand it this is being or has been addressed ? They were using service agents for warranty issues but they do now employ some of there own service engineers. I am aware of 1 installer in the Nottingham area who installed 9 intergas combination boilers , which resulted in 9 in warranty call outs due to a fan fault, so he had a 100% failure rate in the 1st year.

Intergas have or still (?) are offering incentives to installers that are part of there installer type club (?)which was afaik, if u install 10 of there boilers you get one free ? there was also a £75 cash back to installers who fitted there 1st intergas. (make of that what you will)

I am an independent rgi/ boiler installer I have no connection to Intergas or any other boiler manufacturer I believe that my review is fair and accurate. I hope it helps ?









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