Gas Furnaces

Gas Furnaces

Section M1411

Section 1305

VENTED APPLIANCE CATEGORIES

Category I. An appliance that operates with a no positive vent static pressure and with a vent gas temperature that avoids excessive condensate production in the vent

Category II. An appliance that operates with a no positive vent static pressure and with a vent gas temperature that is capable of causing excessive condensate production in the vent

Category III. An appliance that operates with positive vent static pressure and with a vent gas temperature that avoids excessive condensate production in the vent

Category IV. An appliance that operates with positive vent static pressure, with a vent gas temperature that is capable of causing excessive condensate production in the vent

Gas Line Requirements:

Appliances

G2419.4 (408.4)                        Sediment trap

SECTION G2420                        SHUTOFF VALVES

APPLIANCE GAS CONNECTIONS

G2422.1                             Connecting appliances

G2422.1.1                         Protection from damage

G2422.1.2.3                      Prohibited locations and penetrations

HVAC General

Section M1411

M1401.1

Installation

M1401.2

Access

M1401.3

Equipment and appliance sizing

M1401.4

Exterior installation

M1401.5

Flood Hazards

SECTION M1307
Appliance Installation General

M1305.1

Clearance and access requirements

M1305.1.1

M1402.2

Furnaces and air handler clearance

M1305.1.2

Appliances in rooms

M1305.1.3

Appliances in attics

M1305.1.4

Appliances under floors

M1305.1.3.1

Lighting requirements at appliance

M1305.1.4.1

Ground clearances

M1307.2

Appliance anchoring

M1306.1

Clearance from combustibles

M1307.3

Elevation from ignition source

M1307.3.1

Protection from impact

 

Return Air Requirements

IMC 601.5 Prohibits return air within 10 ft from combustion appliances.

 

Combustion Air

Chapter 17 RBC

M1701.1

Scope

M1701.2

Opening locations

Combustion Air and venting and dilution air requirements

Sections G2406 -- G2407 -- G2408

G2406.2

Prohibited Locations inside appliance locations

M1402.3

G2407.1

Combustion air

G2407.5

Appliance combustion air

G2407.2

Appliance location

G2407.3

Draft hood/regulator location

G2407.4

Make up air required

G2407.5

Indoor combustion air

G2407.6

Outdoor combustion air

G2408.2

Elevation of ignition source

G2408.2.1

Installation in garages

G2408.4

Clearance from grade

G2408.5

Clearance from combustibles

G2409

Clearance reduction allowances

Gas furnace venting requirements

CO Vent Requirements:

Unless specified, manufacturer’s instructions should be followed.  Venting code references are listed below.

Code Reference

Description

 

G2426.1

General requirements

G2426.5

Installation Requirements

G2426.2

Required connectors

G2426.4

Shielding from insulation

G2426.7

Protection against damage

 

SECTION G2427

Venting of appliances

G2427.3.5

Above air handling spaces

G2427.4

Vent type required for appliance category (I.E. Type 1 or Type 4)

G2427.4.1

Plastic Vent Pipes

G2427.5.3

Chimney roof terminations

 

G2427.6.4

Gas vent roof terminations

G2427.6.7

Exterior wall terminations

G2427.6.5

Minimum height requirements

G2427.7.1-13

Single wall vent pipe

G2427.10.3

Vent connector requirements

G2427.12

Draft hoods and controls

G2429

Direct vent and integral vent systems