Briefly describes a heat exchanger designed for use in a tight, solar heated house. The exchanger consists of three 3in. galvanized steel ducts within an 8in. galvanized steel duct. The ducts can be assembled in any length - 33 ft. was used in Provident House, giving a theoretical effectiveness of 33%.
Pipes-within-a-pipe heat exchanger used in Provident House.
![](https://www.aivc.org/sites/default/files/default_images/default_image_5.png)
Year:
1978
Bibliographic info:
Canada Mortgage and Housing Corporation industry/science seminar "Controlled Ventilation with Exhaust Air Heat Recovery for Canadian HOusing" 26 October 1978