Specifications include, but are not limited to: DOOR--CRAWL SPACE ACCESS Install a 3/4" CDX plywood access door in a 2"x4" preservative treated frame. Provide galvanized iron hinges and hasp.; FURNACE 90+ GAS - REPLACE Use the most recent version of the Air Conditioning Contractors of America (ACCA) Manual J residential load calculation tool http://www.acca.orc/tech/manualj/ (calculate the load with manual j based on the post rehab building envelope), and use the most recent version of ACCA's Manual S for equipment selection. Provide both Manual J and S reports to the Owner for review and approval prior to installation. Remove existing furnace, recycle all metal components and dispose of all other materials in a code legal dump. Install a 90+ gas fired forced air furnace with minimum AFUE rating of 90% on 2" patio block to existing duct work and gas line. New furnace will have minimum limited warranties of: 20 years on heat exchangers; 5 years on parts. New furnace to be vented with PVC piping per manufacturer's specifications. Install a set back thermostat with separate weekday and weekend programs, 4 settings per day, a vacation hold feature and a lighted digital display such as the Lux Model Psp511LC, vent pipe and new shut-off valve. Rework cold air return if necessary to ensure easy access, good fit and easy replacement of air filter. An exterior return air filter box or boxes shall be installed to filter all return air to the new furnace. Seal all exposed duct joints and seams with Duct Mastic. Remove all existing cloth duct tape prior to installing mastic.
