What is a Category 1 gas appliance?

Definitions. Category I is defined as a gas heating appliance with a flue loss equal or greater than 17% (non-condensing) with a negative vent static pressure.

Is a furnace a Category 1 appliance?

A furnace vented as Category I is considered a fan-assisted appliance and does not have to be “gas tight.” NOTE: Single-Stage and Two-Stage gas furnaces with induced draft blowers draw products of combustion through a heat exchanger allowing in some instances common venting with natural draft appliances (i.e. water …

What is a Category 1 water heater?

into the following four categories: Category I. An appliance that operates with a nonpositive. vent static pressure and with a vent gas temperature that. avoids excessive condensate production in the vent.

Is B vent a Category 1?

The AmeriVent all-metal, double-wall gas vent is listed as Type B by Underwriters Laboratories, Inc. and is approved for such residential and commercial applications as Category 1 water heaters, boilers, furnaces, space heaters, or wall heaters.

Can two gas appliances share a vent?

A solid-fuel-burning appliance or fireplace shall not connect to a chimney passageway venting another appliance. In other words, only one appliance per flue, period.

What are B vents?

Sometimes referred to as Natural Vent – B-Vent appliances use pipe (b-vent) that must be installed through the home and terminate above the roof. They also use room air for combustion, but the amount of air they use is minimal. Some of the heat from the appliance is lost up the vent. …

What is Type L vent?

Type L vents are designed for venting approved oil-fired and natural-gas appliances that produce draft hood flue gasses that do not exceed a temperature of 570º F (299º C), or 926º F (299º C) for 10 minutes in an over-fire situation. Type L vents should not be used to vent coal- or wood-fired appliances.

What are the types of vents?

There are three types of venting in your home: venting for supply air, return air and exhaust air. The effectiveness of these venting systems is facilitated by a combination of heating and air system materials, duct sizes, duct sealant and insulation.

What is a Type C vent?

Type C vents are used only as connectors. They are single walled galvanized pipes, and as such often called “galvanized pipes”. They are used only for venting gas or oil. Using a C vent with solid fuel appliances can cause extremely toxic fumes.

What are the different types of gas appliances?

Gas appliances are divided into four venting categories based on vent operating pressure and whether they are condensing or non-condensing. Category I is negative pressure, non-condensing. Category II is negative pressure, condensing. Category III is positive pressure, non-condensing.

What is a Category I gas heating appliance?

Definitions Category I is defined as a gas heating appliance with a flue loss equal or greater than 17% (non-condensing) with a negative vent static pressure. In other words, in a Category I venting system, if there is a leak in the venting system, air from the space will flow into the flue pipe and no flue gas will flow into the space.

What’s the difference between Class 1 and Class 2 appliances?

The extra safety features built into Class I and Class II appliances are therefore not required. For medical devices, compliance with Class III is not considered sufficient protection, and further more-stringent regulations apply to such equipment. IEC 61140: Protection against electric shock — Common aspects for installation and equipment.

What is Category I fan assisted gas appliance?

Category I Fan-Assisted Gas Appliance\ An appliance that operates with negative static pressure in the vent, a temperature that is high enough to avoid condensation in vent, and an integral fan to draw a controlled amount of combustion supply air through the combustion chamber.