Replacement back refractory for Heatilator wood fireplaces, measures 16.69" x 20" x 5/8". Be sure to check your date code. Fits the following models:

NOTE: To prevent cracking due to thermal shock, we recommend seasoning the refractory by building relatively small fires for the first few burns, and then gradually working up to larger fires.

Heatilator Wood Fireplaces:

• HB36A - 15/91 through 25/92
• HB36AI - 15/91 through 25/92
• HB36AM - Post 7/91
• HD36B - 26/91 through 25/92
• NA36A - 27/91 through 24/92
• NA36AI - 27/91 through 24/92
• RB36AI - Post 26/91
• TD36B - Post 21/91

Heatilator part # 16755A
OEM HHT part 

May fit other models, please check your owner’s manual for part number compatibility.