Why is my furnace exhaust pipe hot?
Table of Contents
- 1 Why is my furnace exhaust pipe hot?
- 2 How hot is exhaust from high efficiency furnace?
- 3 What is in exhaust from high efficiency furnace?
- 4 What does the furnace exhaust fan do?
- 5 What is in the exhaust of a gas furnace?
- 6 What is the difference between an exhaust fan and a ventilation fan?
- 7 How is the exhaust vented from a high efficiency condensing furnace?
- 8 How does a high efficiency furnace work?
Why is my furnace exhaust pipe hot?
It’s normal for your exhaust pipe and the exhaust to feel warm. It’s also normal to see icicles or other icy build-up around the pipe during freezing weather. If your pipe is very hot, call Breedlove Dobbs so we can have an experienced and qualified technician check it out.
How hot is exhaust from high efficiency furnace?
So, how can you use this information as a diagnostic? To make it simple, the typical combustion gas temperature for a 90+\% efficient furnace should be in the 100 to 130 degree F range. This usually equates to a median pipe material temperature value of 86 to 100 degree F.
How hot should a furnace exhaust pipe get?
86 to 100 degree F.
The pipe material temperature value is usually 86 to 100 degree F. The temperature should be taken outside of the furnace cabinet.
How hot is the exhaust from a gas furnace?
Exhaust and outlet temperatures fuels like natural gas, liquefied petroleum, diesel and more.
| Appliance type | Exhaust Temperature | |
|---|---|---|
| (oF) | (oC) | |
| Gas-fired heating appliance, no draft hood | 460 | 238 |
| Glass melting furnace | 1200 – 1600 | 650 – 870 |
| Oil-fired heating appliance, residential | 560 | 293 |
What is in exhaust from high efficiency furnace?
The condensate that is left over from a high efficiency condensing furnace contains acidic water that would damage normal vents. As a result, instead of using a conventional vertical venting system, a high efficiency system uses PVC pipes that are connected to your furnace and lead out of the side of your home.
What does the furnace exhaust fan do?
Your furnace exhaust fan, also called the inducer fan, is a crucial part of venting your furnace properly. It vents the exhaust that’s created during the combustion process to the outside to keep your home safe. Noises coming from the inducer fan or inducer motor can indicate a problem that needs to be fixed.
Should furnace be hot to touch?
Most single stage furnaces should be just uncomfortable to touch on the main trunk just above the main unit. As Heat rise levels can range from 50-70 higher than ambient air temp. Yes, it’s normal.
Can high efficiency furnaces be vented vertically?
Sidewall Venting (High efficiency appliances) Venting can also be vertically vented through the roof (be wary as there can be unforeseen problems with venting through the roof as they are not easily maintained). Separate venting pipes are an optimal choice here as well.
What is in the exhaust of a gas furnace?
The furnace exhaust flue, also called a furnace exhaust stack, is a metal tube that vents the noxious combustion gases from the heat exchanger to the outside. Inside the stack resides a damper that regulates the pressure between the air from the furnace and the outside air.
What is the difference between an exhaust fan and a ventilation fan?
The main difference between the two types of fans is their application. While a ventilation fan works to bring clean air into an enclosed space from an outside source, an exhaust fan removes pollutants from the indoor air in a home or commercial space.
How hot is too hot for a furnace?
When the combustion occurs and air is first heated, the temperature is between 140 degrees F and 170 degrees F. This is extremely warm and could be dangerous to anyone if they got too close to it or it was blown directly into your home.
How do you reset a furnace after overheating?
How to Reset Your Furnace
- Turn down the thermostat to its lowest setting.
- At the circuit breaker, turn off the power to the furnace.
- If this is a gas furnace, turn off the gas supply at the valve for the main gas pipe, but leave the pilot’s gas supply on.
- If the pilot light was out, light a match to relight it.
How is the exhaust vented from a high efficiency condensing furnace?
To accommodate the unique nature of exhaust gases in a high-efficiency condensing furnace, the exhaust is typically vented through the sidewall of the home through PVC plastic pipes, not metal.
How does a high efficiency furnace work?
These highly efficient furnaces have a heat exchanger and a condensing chamber that help maintain a considerably low temperature on the pipes. The only thing you may have to additionally invest in is a drain line to drain the acidic water that is a result from the condensation from the exhaust.
Will high efficiency furnace venting ruin my gas furnace?
It will ruin the standard venting equipment that is used in conventional gas furnace ventilation systems. To avoid this problem, high efficiency furnace venting requires the use of PVC pipes instead of metal pipes to remove the acidic condensate from your home. These PVC pipes are connected to the furnace and expelled outside.
What is a vented furnace and how does it work?
It uses a venting system to extract that heat before venting. What is vented is a residual corrosive condensate of water and carbon dioxide. This residual liquid is highly acidic. It will ruin the standard venting equipment that is used in conventional gas furnace ventilation systems.