Fly ash is made up of extremely fine particles. Ash vacuums are designed with two stage filtering to stop fly ash being blown out into the home. If a normal household vacuum is used to suck up ash, you will find that your home interior gets covered with a fine layer of dust.
The other important point is that the filters and bags of a household vacuum are made of flammable materials. The forced air used by a vacuum cleaner to pick up dust will cause any tiny spark to glow which can then ignite dust in the dust bag, or the filters.A pellet stove vacuum has a flame retardant hose with a metal pick up tip. The ash is dumped into a non flammable metal canister.
Ash vacs can't be used to pick up other dust which may be flammable unless they are thoroughly cleaned out, including the filters. Flammable dust may ignite from a spark.
Types of Ash Vacuum
There are two basic types. The cheapest option is to go for one which uses your household vacuum to create the suction. The household vacuum is plugged into one side of the metal canister, which contains the ash filters. The ash vac hose used to clean the fireplace exits from the other side.
More expensive are the models which have their own motor built in. These can also have systems for cleaning the filter while the vacuum is in use and without having to empty it.
The Bad Ash Vacuum
Available in North America from
ABCvacuumwarehouse,
The Bad Ash adaptor is the type that runs from your domestic vacuum. It's designed for cold ashes only. The hose has an aluminium tip with a crevice tool.Machine Mart Ash Vac
Available in the UK from Machine Mart,
and similar to the Bad Ash adaptor is the Machine Mart Clarke ash vac. This cleaner is designed to be used together with a wet and dry vacuum. This also has an aluminium tipped tool and can only be used when the ash is cold.Self Cleaning Ash Vac from Amphora
Available from
Amphora
This ash vac is completely self contained. It has a self cleaning system for the filter which vibrates the dust off while the machine is running and compacts the ash in the container. The motor is within the filter cartridge and is quiet. This cleaner is for cold ash only.Loveless Ash Vacs
These are the only true warm ash pellet stove vacuums available. The filters are flame retardant so that if a spark accidentally gets sucked in, the only result will be a slight charring of the filter.The Loveless warm ash vacuum is designed to remove only the burnt ash, leaving larger embers behind to be consumed when the fire is re-started.
A tool package is available which includes a horsehair cleaning brush to remove ash from the viewing window and decorative logs, a pellet stove cleaning hose which is flexible and fits on the main hose end to get into nooks and crannies, and a crevice tool.
Both the Cougar and the Cheetah 11 have a filter cleaning mechanism to allow cleaning without emptying the stove. The Cheetah also has a spring loaded filter that cleans ash off when the machine is stopped and re-started.For more information, go to Lovelessash.com.