[. . . ] Packaged Side Wall Vent Systems Ideal For Replacing Plastic Pipe On 80-Plus Gas Furnaces Safety and performance features time-proven in over one million installations: s All operating components located indoors for weather protection and easy servicing. [. . . ] Interlock Relay or Timer/Relay and Fan Proving Switch with burner. GPAK-JT, 1T Timer/Relay -- 24/115V Switching Relay, 45 Second Fixed Delay Fan Proving Switch -- 3FLA, 18 LRA@120 VAC MODEL SELECTION TABLE NOTES: 1. If the appliance flue outlet is greater than 4'', install a tapered reducer after the draft hood, draft diverter or barometric draft control, reducing vent pipe diameter to 4''. All vent pipe from the appliance to the Power Venter may be 4''. Maximum Total Vent Pipe Length Models Vent Pipe Diameter BTU/hr Input *40, 000 ATM Atmospheric Fan Assisted +Column B A B C GPAK-J GPAK-JT *GPAK-JT* 4'' 45, 000 75, 000 100, 000 120, 000 100' 100' 100' 45' 60' 60' 60' 60' 60' 60' N/A N/A 60' 60' 60' N/A N/A 100' 60' 100, 000 3. Determine maximum pipe length from GPAK-1 type of equipment being vented and 100' 60' 120, 000 GPAK-1T 4'' GPAK Model. Column A pipe runs 100' 60' 150, 000 *GPAK-1T* over 30 linear feet should use Type 87' N/A 200, 000 "B" vent. Column B & C pipe runs over 15 linear feet should use Type 40' N/A 250, 000 "B" vent. input atmospheric water heater common vented with a fan assisted appliance from column B. 5. [. . . ] Also available, *GPAK-1TR* for use with Rheem, Ruud, Weatherking and Heat Controller brands. DISTRIBUTED BY: ® TJERNLUND PRODUCTS, INC. 1601 Ninth Street White Bear Lake, MN 55110-6794 Phone: 612. 426. 2993 800. 255. 4208 Fax: 612. 426. 9547 Copyright © 1997 Tjernlund Products Inc. [. . . ]