Vaillant ecoTEC Plus 840 40kW Combi Boiler with Flue & Vaillant Filter

Vaillant ecoTEC Plus 840 40kW Combi Boiler with Flue & Vaillant Filter

Marsoni

M251S

$1127.50

Get it in 3 business days with 1 day shipping. Friday, May 29

Vaillant ecoTEC Plus 840 40kW Combi Boiler with Flue & Vaillant FilterThe Vaillant ecoTEC Plus 840 is a high efficiency 40kW combi boiler designed for larger homes and properties with higher heating and hot water demands. This condensing boiler delivers reliable performance with a SEDBUK A rating, reducing energy consumption and lowering heating bills. The package includes a factory fitted flue kit and Vaillant filter, simplifying installation and ensuring optimal air quality from the start. The ecoTEC Plus range is

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Pack a lunch when you tackle this project boys.. its a doozy!! Month in going great so far definetly did what I purchased it to do. 2000 chevy with two p3 10s every bass drop sounded like an old firebird with loose trunk bolts. Threw this on the back walls floor underneath the speaker and the doors.. all that energy is now in the cab with me instead of getting lost in rattling metal!! Love it!!! Left a few pieces outside after I was done rained like hell on them so water doesnt hurt this stuff at all or direct sunlight in south mississippi.. good stuff pick this up and make them systems thud instead of rattle!!! You wont regret it!! I didn't!!

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Reviewed in the United States on June 11, 2026

Verified Purchase

Roseanna Boyce

Grantham, US

★★★★★ 5

Delivers a quieter ride

Size: 36 sqft

This works very well to put down road noise. The difference was immediate in my van. I was shocked it made such a difference.

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Reviewed in the United States on June 6, 2026

Verified Purchase

Charlottesville, US

★★★★★ 4

Reasonably priced sound deadening

Size: 18 sqft

Easy to cut with a carpet knife. I used a heatgun to make it stickier and more moldable. The foil isn't so thick that you risk cutting yourself like some Dynamat variants.

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Reviewed in the United States on March 12, 2026

Verified Purchase

David

Charlottesville, US

★★★★★ 5

Works for me

Size: 36 sqft

Sticky so don’t let it touch you or each other but it comes off and works fine.

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Reviewed in the United States on June 7, 2026