Tamarack Technologies is a leader in improving year round residential indoor air quality while reducing the carbon footprint. The product line consists of the only R50 fully insulated whole house fans on the market today. Our line of electronic bath fan controls achieve ASHRAE and Energy Star standards. To maintain the Energy Star rating on balancing air pressure between rooms with a central return forced air system, we offer a wall (RAP) and in-door version (Perfect Balance®) return air pathways with light and sound mitigation material. All of these products are easily installed and provide years of maintenance-free operation using very low or no energy to operate.