Dundas Jafine carries a full line of air filtration products for residential and commercial applications including furnaces and air-conditioning units. Available in both permanent and hammock style filters. Permanent air filters offer a high efficiency filtration system consisting of natural fibers that create an electrostatic charge thus effectively trapping large amounts of dust and dirt particles over 2-1/2 times that of traditional glass fiber throw away filters. Permanent filters are washable and reusable. Hammock style filters are used in basket type applications and are an economical glass fiber medium.