LZQ Stainless-Steel Flue Pipe Heat Exchanger Coil

Stainless-Steel: The LZQ flue pipe heat exchanger coil is designed to use residual heat from a fireplace or stove to preheat water. Its spiral tube is claimed to fit flues with 12.5 cm or 15.5 cm inner dimensions, so confirm the selected variant matches your pipe before buying.

At a glance

Uses residual heat from a fireplace or stove to preheat water, according to the listing.
Spiral construction is offered for two stated flue inner dimensions: 12.5 cm and 15.5 cm.
The listing describes a stainless-steel tube with a 1/2 inch water connection.

Price

€83.92Save 5%

Reference price: ~~€88.34~~

Price checked: 12 Nov 2026

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Pros and cons

Pros

Designed to make use of flue heat that would otherwise escape, for water preheating.
Two flue inner-dimension options are stated, supporting different pipe sizes.
The stated 1/2 inch water connection may suit installations using that connection size.

Technical specifications

9 specifications

Dimensions and installation
Dimensions listed	15 x 15 x 40 cm
Flue inner dimensions	12.5 cm / 15.5 cm
Water connection	1/2 inch
Power source type	hand_powered

Materials and construction
Tube material	stainless steel
Tube diameter	12 mm
Tube thickness	0.7 mm
Total tube length	14 m (33 turns) / 16 m (34 turns)

Identification
Part number	HKAN-(QN10459)

What to know before buying

Listing details to confirm

The listing is inconsistent about dimensions: product details give 15 x 15 x 40 cm, while the description lists 15 × 15 × 40 cm / 18 × 18 × 40 cm alongside the two flue sizes. Confirm the selected variant, dimensions and included components in the chosen listing. The manufacturer also advises avoiding direct flame contact, emptying the coil completely before frost, checking regularly for leaks and damage, and installing only outside electrical wiring.

Who is it for?

A good fit for

Fireplace or wood-stove owners seeking to preheat water using residual flue heat.
Buyers whose flue inner dimension and water connection match the selected coil.

Less suited to

Buyers who need a confirmed fit without first matching the selected variant to their flue.
Those looking for a specified water-heating output or independently verified performance, which the supplied listing does not establish.

LZQ Stainless-Steel Flue Pipe Heat Exchanger Coil · photo 2 — Additional product photo 2

Customer reviews on Amazon

5 / 5 · 2 ratings

5 stars100%100%
4 stars0%0%
3 stars0%0%
2 stars0%0%
1 star0%0%

The supplied evidence contains only a very small set of aggregate ratings, all in the five-star category. That is a limited positive signal, not enough to establish performance, fit or long-term reliability. For this coil, buyers should still confirm their flue size and connection against the listing.

Frequently asked questions

What flue sizes does the listing mention?

It states inner dimensions of 12.5 cm and 15.5 cm. Confirm which variant is selected and measure your flue before ordering.

What connection does the coil use?

The listing specifies a 1/2 inch water connection. Check that it matches your planned installation.

What precautions does the listing give?

It says to avoid direct flame contact, empty the coil completely before frost, check regularly for leaks and damage, and install only outside electrical wiring.