Best Chimney Brush for a Metal Chimney (2026)

Compare the picks

Figures are as each listing states, collected 22 October 2026. Only one of these listings designs its brush for metal flues, and only one states a warranty term.

How we scored them

Each brush is scored out of 10 on performance, build, value, safety and warranty, using only what the listing publishes. The weights are on our How We Pick page.

Scores run from 9.2 to 9.8: each product’s point total is placed on that range, so more points always means a higher score.

Buying guide: the best chimney brush for a metal chimney

Poly vs wire bristles

This is the decision that matters for a metal chimney. The Stanbroil is the only brush here with a listing that designs it for the job: a polypropylene head for insulated chimneys, stainless steel and metal stove pipes, on a galvanized steel twisted-spiral stem. The three wire brushes check masonry flues in their spec tables and leave metal flues unstated, which is not an endorsement of wire on metal. Poly sweeps soot and loose glaze without the aggression of steel wire, and the listing also states the brush helps prevent flue fires and makes the sweep more efficient. If you have been sweeping a metal flue with a wire brush, the listings suggest the poly head is the purpose-built alternative.

That does not make the wire brushes useless here. Wire is the right call for masonry, and a wire brush can still serve as the rough pass on a badly neglected flue before the poly head finishes the job. But for routine sweeping of a metal chimney, start with the brush the listings designed for metal.

Match the head to the flue

Measure the flue before ordering. This group covers a 6 in square head, an 8 in round head, an 8×12 rectangle head and an 8 in square head, so there is a head for the common square, round and rectangle flue shapes. A brush should fill the flue so the bristles scrub the walls on every pass: too small and it skims past the buildup, too large and it binds in the flue. Round heads suit round flues, square heads suit square flues, and the rectangle head is the odd shape for rectangle flues. Note the Stanbroil listing contradicts itself on size: the title and bullets say 8 in round while the spec table says 6 in. The title and bullets are trusted over the spec table, and the contradiction costs the listing in scoring.

Fittings and rods

None of these brushes includes rods, so plan the full kit before you climb. The Midwest Hearth brushes carry 1/4 in NPSM male threads for the brand’s fiberglass rod kits, sold separately. The Stanbroil uses 1/4 in NPT male threads and works with most chimney rods, with rods connecting to extend reach, and it is easy to assemble and disassemble per the listing. The Rutland attaches to a rod or pull rope, sold separately. Whichever head you pick, buy enough rod length to run the full flue from the top or the bottom, and check the thread match before ordering.

Manual sweeping only

Both Midwest Hearth listings state manual sweeping only. Do not chuck a brush in a drill: the stems and threads are built for hand-driven rods, and power driving them risks damage to the brush, the rods or the flue. Work the brush up and down the full flue length with steady strokes.

Sweeping technique

Work the brush the full length of the flue with steady up-and-down strokes, adding rods as you go, and let the bristles do the work rather than forcing the head. The Stanbroil listing notes you can connect chimney rods to extend your reach, which is how you sweep a tall flue from the roof or the cleanout. Keep the strokes even and cover the whole perimeter; soot hides in the corners of square flues and along the seams of round pipe.

After sweeping, the Midwest Hearth listings remind you these are manual tools: steady hand-driven strokes, no power tools. A drop cloth at the cleanout keeps the mess contained, and a look up the flue with a light afterward shows what the brush left behind.

Warranty

Only the Rutland states a warranty term: lifetime, per the spec table, which is the strongest warranty statement in this group by a wide margin. The other three listings state no warranty term, so they score no warranty points here. A stated term is the only warranty that counts in scoring; a listing that talks about quality without naming a term earns nothing for it.

Around the Woodpile

• Measure the flue before ordering: this group covers 6 in square, 8 in round, 8×12 rectangle and 8 in square heads.
• Rods are not included with any of these brushes. The Midwest Hearth brushes fit fiberglass rod kits sold separately; the Rutland takes a rod or pull rope, also sold separately.
• The Midwest Hearth listings state manual sweeping only, so keep the drill in the shop.
• Sweep before the burning season and have the chimney inspected every year.
• Routine chimney cleaning helps prevent fires, per the Rutland listing.

Frequently Asked Questions

Can I use a wire brush on a metal chimney?

The wire brush listings here check masonry flues and leave metal flues unstated, which is not an endorsement of wire on metal. The polypropylene Stanbroil is the one designed for insulated chimneys and metal stove pipes. For a metal flue, that is the designed-for pick.

What size chimney brush do I need?

Match the brush head to the flue: 6 in square, 8 in round, 8×12 rectangle and 8 in square are the heads in this group. Measure the flue first, since a brush that is too small skims the walls and one that is too large binds.

Do chimney brushes come with rods?

None of these four include rods. The Midwest Hearth brushes take 1/4 in NPSM fiberglass rod kits sold separately, the Stanbroil works with most chimney rods, and the Rutland attaches to a rod or pull rope sold separately.

What does 1/4 NPSM mean on a chimney brush?

It is the thread fitting: 1/4 in male pipe threads that screw onto standard chimney rods. The Stanbroil uses 1/4 in NPT and the Midwest Hearth brushes use 1/4 in NPSM; both are the standard small-rod fitting these listings describe.

How often should I sweep a metal chimney?

Sweep before the burning season and have the chimney inspected every year. If you burn a lot of wood, check the flue mid-season as well.

Related guides

For masonry, see the best chimney brush for a masonry chimney; for the rods question, read chimney brush vs cleaning rods. Also see the best chimney brush for a wood stove, the best chimney brush for a pellet stove, the best chimney sweep kit for a stone chimney and the best creosote remover for a wood stove.