Heatiator NDI35-SP, NDI30-SP Fireplace Size Requirements, Minimum Fireplace Opening, NDI35 NDI30

5 Fireplace Size Requirements

A. Minimum Fireplace Opening

Minimum fireplace opening requirements for a standard 3/4 inch deep surround are shown in Figure 5.1. For smaller openings, an optional 1-1/2 inch deep surround is available and dimensions are shown in Figure 5.2.

WARNING! Risk of Fire or Burns! Provide adequate clearance around air openings and for service access.

Due to high temperatures, the appliance should be locat- ed out of traffic and away from furniture and draperies.

•The firebrick (refractory), glass doors, screen rails, screen mesh and log grates can be removed from a factory built fi rebox in order to gain minimum gas insert opening requirements.

•Any smoke shelves, shields and baffles may be removed

from the factory built fi rebox if attached with mechanical fasteners.

•The metal floor of the solid fuel firebox may be removed to facilitate the installation of the insert. The appliance may not be placed directly on the base of the outer wrap, a 1/4 inch airspace must be provided between the insert and the floor of the outer wrap. Use the levelling legs to raise the insert a minimum of 1/4 inch. The original fi replace may never be returned to solid fuel in this condition. The sidewalls and top structure of the fi rebox may not be altered with the exception of removable baffl es and dampers.

•Cutting of any sheet metal parts of the fi replace in which the gas fi replace insert is to be installed is prohibited, except the fl oor as tested for and as noted above.

TOP VIEW FRONT VIEW

C

A

E I

G

H

D

SIDE VIEW

F

B

MINIMUM FIREPLACE SIZE

	Location	NDI35			NDI30
		Inches	Millimeters	Inches		Millimeters
A	Rear Width	23-1/2	597	20-1/4		514
B	Front Width	34-5/8	879	30-1/2		775
C	Glass Opening Width	31-9/16	802	27-7/16		697
D	Glass Opening Height	15-11/16	398	12-13/16		325
E	Height-Front	24	610	20-1/2		521
F	Height-Rear	21-1/16	535	17-5/8		448
G**	Unit Depth	16	406	14-3/4		375
H	Venting Depth	10-1/2	267	9-1/2		241
I	Height to Top of	22	559	18-1/4		464
	Glass Frame

*Note: If exhaust collar on insert and fi replace damper do not line up, add 4 inches (102 mm) to minimum

fireplace height for bends in vent pipe.

**Unit depth is measured to the back of the surround to give the depth needed for installation.

In addition to these dimensions, also reference Clearances and Mantel Projections (Section 5.B).

Figure 5.1 Fireplace Opening

Heatilator • NDI30, NDI30-SP, NDI35, NDI35-SP, NDI30-SPFK, NDI35-SPFK • 2226-900 Rev. G • 4/11 17