The condensate trap is absolutely mandatory for a high-efficiency gas furnace. Since the drain taps into the exhaust system, leaving it open to the air would allow for a potential exhaust/flue gas leak in the living space, which is a big no-no.
Do high efficiency furnaces have condensate?
A 90% or higher efficiency furnace produces around 0.8 gallons of condensate per hour of running. This equates to about five or six gallons per day of acidic water from condensation each day. Most of the time, the drain and drain line runs to outside the home and the condensate just seeps into the ground, harmlessly.
Where is the condensate trap on a furnace?
Typically, the furnace is installed in the furnace closet or garage. With these furnaces, the evaporator coil sits on top of the furnace. The condensate drain line is right beneath the evaporator coil.
Should condensate trap be full of water?
The boiler should never be operated without the condensate trap in place, as it prevents noxious combustion gases from travelling down the condensate pipe. Should the trap have to be removed from the boiler, it must be topped up with water when it’s replaced.
Do condensate drains need a trap?
The only code requirements for drain lines removing condensate from HVAC equipment are: a) for the installation of a trap in accordance with the unit manufacturer’s installation and operating instructions; b) that the drain lines slope toward the final drainage point at a rate of 1/8 inch per foot.
How acidic is high efficiency furnace condensate?
Condensate from a high-efficiency furnace typically has a pH of about 5.0, but can range from 3.5 to 6.5. It’s important to note that pH is a logarithmic scale, so pH 5 water is 10 times more acidic than pH6. If the water sits in a trap and evaporates, the acidity and corrosive effect will increase.
Do high efficiency furnaces leak water?
Condensation Leaks
If you have a high-efficiency furnace, it’s likely that your furnace system will generate condensation. A condensation leak can be the cause of two things: damage/clogged tubing or a floor drain clog. If the tubing that aids the draining is damaged or clogged, this is where a leak occurs.
Does a furnace have condensate?
When a high efficiency furnace releases the exhaust gases, condensation is created. This condensation is a significant amount of moisture on the PVC pipe, and it needs to be drained either into a floor drain or a condensation pump.
How should a high efficiency furnace be vented?
Proper sidewall venting requires installing separate vent pipes horizontally so that they vent to the outdoors through a wall of your home. These ventilation pipes should be isolated from the furnace combustion chamber and made airtight to eliminate the possibility of combustion gas leakage.
What causes condensation in furnace?
Again, the most common reason for a leaking furnace is a condensation leak. High-efficiency furnaces extract heat from the combustion gases for a longer period of time than a standard-efficiency furnace does, causing the gases to cool, then condense.
What happens if furnace condensate line is clogged?
A clogged condensate drain line will trap water in your air conditioner. As a result, the evaporator coil will eventually turn to ice. The moisture in the drain line can also freeze, which will cause your air conditioner to turn off.
How should a condensate pipe be installed?
Where an installer is fitting a new or replacement boiler, the condensate discharge pipe should be connected to an internal “gravity discharge point” such as an internal soil stack (preferred method), internal kitchen or bathroom waste pipe such as sink, basin, bath or shower waste.
