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each, total 180.000 BTU/hr. input 6 manual infinitely adjutable controls (Propane is 180,000 BTU/hr.) Overall Dimensions: GHP-2H: 13 1/2" H x 12" W x 24 3/4" D (34.3 cm x 30.5 cm x 63 cm) GHPW-2H: 13 1/2" H x 24" W x 13 3/4" D (34.3 cm x 61 cm x 30.5 cm) GHP-4H: 13 1/2" H x 24" W x 24 3/4" D (34.3 cm x 61 cm x 63 cm) GHP-6H: 13 1/2" H x 36" W x 24 3/4" D (34.3 cm x 91.4 cm x 63 cm) Note: Regulator and pipe add 1 1/4” to the rear of the unit. Shipping: GHP-2H: GHPW-2H: GHP-4H: GHP-6H