Single Stage Gas Valve Furnace

A double stage furnace is more closely akin to the single stage furnace than the modulating furnace.

Single stage gas valve furnace.

While the component itself if actually rather simple a furnace gas valve is a crucial part of your hvac system. With the vehicle analogy the car would travel at either full stop 0 mph maximum speed 120 mph or local street speed. This furnace has only two settings. That means that the 100 000 btu furnace can operate at.

A single stage furnace has two major advantages over a two stage furnace. Mid efficiency two stage furnaces costs about 2 500 to 4 000 including installation the furnace itself usually costs 1 500 to 2 000 while labor adds an additional 1 000 to 2 000 high efficiency models cost about 4 000 to 5 000 to buy and install. Flexibility is the main difference between one stage and two stage furnaces. A model with two stage heating contains a two stage gas valve and a variable speed.

The furnace gas valve opens and closes which allows the flow of gas to the pilot light and burner s. High fire and low fire. Like the single stage it too has maximum high and off settings but it does have one additional low stage that allows for a slower less energy gobbling stage of heat. The two stage gas valve the two stage gas valve solves the above problems by allowing for two different modes.

Two stage gas furnace valves can open at either about 70 or 100. From our top of the line evolution system furnaces through the solidly built legacy line of bryant furnaces you can find the blend of dependable heating performance quiet operation and exceptional comfort and energy savings that is right for your home. It seems clear that the utilities manufacturers and contractors are. There are also gas valves located.

How many stages a furnace has is determined by its gas valve type. Generally two stage furnaces cost about 500 more than comparable single stage models. As soon as the furnace turns on it starts running at full blast. When someone refers to a one stage aka single stage or a two stage furnace they are actually talking about the burner section inside of the furnace or more specifically the valve that controls it.

Furnace gas valves are only seen on gas fueled forced air furnaces or gas powered boilers. These furnaces are either on and running at full capacity or off. Single stage furnaces have a gas valve that opens at 100 capacity. Hence a furnace with a single stage gas valve will often need more servicing and parts replacement than furnaces using other types of gas valves.

A furnace with single stage heating contains a fixed gas valve and a single speed blower motor. If it is a 100 000 btu per hour furnace it is always burning at the 100 000 btu rate. I have been searching in vain for objective information online about the pros and cons of single versus 2 stage gas furnaces and yours is a lone but compelling voice of reason in the wilderness. Your average every day old fashioned furnace is a single stage or one stage furnace.

Whether it s a mildly chilly fall evening or a bitter cold winter night the furnace runs at the same setting.