Venting 80 Efficient Furnace

80 gas furnace installation instructions gas furnace safety table of contents.

Venting 80 efficient furnace.

Conventional furnaces use only one they use a two stage process. This structure generally uses the furnace vent pipe through roofbecause the b venting pipe is designed in vertical manner. 80 efficient horizontal venting. Must conform to the requirements of the national fire protection association.

In the first stage gas is burned to heat the first heat exchanger. You need to use an auxiliary power inducer. Bought a new ruud 80 efficient updraft furnace to replace an inefficient 20 year old one. After the first heat exchanger is heated the second stage begins.

In a standard efficiency 80 furnace 20 of the heat contained in the natural gas is exhausted up the furnace vent. For even greater efficiency gains consider a two stage or fully modulating unit with variable airflow. The instructions state horizontal vent with tjernlund power blower. There now seem to be some arguement as to the ability to vent horizontally with this unit.

High efficiency furnace venting uses two heat exchangers. You cannot just take the vent off an 80 efficient furnace and run it out a side wall. The national fuel gas code ansi. When the vent is withdrawing air from the house it expels the gas outside through the vent.

The installation of the furnace wiring warm air ducts venting etc. Go with a new 80 furnace. A 95 furnace makes sense here. An 80 efficient furnace can be side wall vented per national fuel as code 7 3 4 with the use of a mechanical draft system of either forced or induced draft design.

You re replacing an 80 furnace in a vented space. The furnace is propane gas. In the second stage the secondary heat exchanger extracts heat out of the hot. So what does this mean.

A condensing furnace with an afue of 90 or above incorporates a secondary heat exchanger to recover that lost heat. A condensing furnace with an afue of 90 percent or above. For many homes a gas furnace is the preferred heating device it has proven to be an efficient and reliable way of meeting household heating needs over the years. If you want a more energy efficient model consider a two stage unit with variable airflow before committing to a 95 furnace and the extra construction that it will require.

Your new furnace will live in an enclosed or encapsulated space.