Thermo Products Thermo Pride Furnace MHA1-75N User's Manual | Page 8

Thermo Products Furnace User's Manual - Thermo Pride Furnace MHA1-75N.
Download
Page  of 61
4.8, 1781 votes
background image

All installations and services must be performed by qualified service personnel. 
 

and MDA1-75; 100CA-BASE for MDA1-100; and 125CA-BASE for MDA1-125. 
refer to Figure 1. 
 

 

 
 

Figure 1: Counter flow Furnace Combustible Surface-Mounting Base 

 

D. Standard Clearances 
 

Definitions of combustible material and non-combustible  as issued by the 
National Fuel Gas Code are as fol ows: 

 
 

Combustible Material: 
Materials made of or surfaced with wood, compressed paper, plant fibers, 
plastics or other material that will ignite and burn whether flameproof or not or 
whether plastered or not plastered. 

 
 

Non-combustible Material: 
Material which will not ignite and burn; such materials consisting entirely of steel, 
iron, brick, concrete, slate, glass, plaster or combination thereof. 

 
 
Table 1: Minimum Clearances to Combustible Materials 
    

Model No. 

Sides & Rear 

of Furnace 

(in.) 

Front of 

Furnace 

(in.) 

Top of 

Plenum 

(in.) 

Flue or Vent 

(in.) 

Sides of 

Plenum 

(in.) 

All Models 
Covered by 
This Manual 

0 6 

*6 1 

*6 in. clearance may be reduced to 1 in. with UL Recognized type B1 vent. 
 

The minimum clearances are listed for fire protection. Clearances for servicing 
and proper operation, the front of the furnaces and to all points on the furnace 
requiring access must be 24 in. 
 
 

0.566402s