This Recoheat Airflow Heat Recovery System is built to fit 5" stove flues with a spigot end. If you are retro-fitting the unit to a stove pipe that does not have a spigot, you will need to purchase the wide-topped version of this.
It is supplied with a super-silent aquarium pump with an air flow rate of 3600 litres per hour (60l/m), 1 metre of heat-resistant black silicone tube, and 3 metres of standard tubing, plus connectors.
The Recoheat is a heat pump for wood burners and solid fuel stoves. It significantly increases the heat output of your stove and how long the stove delivers heat for, and reduces your fuel consumption - all at the cost of running the 37-watt air pump - so similar to the cost of a light bulb.
Please check your flue size carefully - this is the 5" version: 6", 7"and 8" versions are available.