Not a good idea. This is guaranteed to create problems. Your existing vent is sized for one dryer only. Dryers and vents do not have built in back flow devices.
No. Not at all. Your dryer will be throwing bits of laundry dust into the kitchen and the kitchen will be throwing traces of oily smoke into the dryer. Sooner or later you will have a house fire from combining the two exhausts.
Per the requirements of the International Residential Code, Section M1502 (2009-2021 IRC), the clothes dryer exhaust duct should be a rigid or semi-rigid metal duct made of galvanized steel or galvanized aluminum with a smooth interior finish and a duct diameter of 4 inches.
As others have said it's not a good idea. The circuit breaker will likely trip if both are turned on at the same time. Or worse you could over heat the line and potentially start a fire if the breaker didn't work.
The maximum length of the exhaust duct does not include the transition duct. This means that vents should also be as straight as possible and cannot be longer than 35 feet. Any 90-degree turns in the vent reduce this 35-foot number by 5 feet, since these turns restrict airflow.
M1502.
According to the M1502. 5 code, the construction of a dryer duct has to be a minimum of 0.4 mm thick with a smooth interior. This means ribbed vents are no longer being used. Additionally, all duct joints must point in the direction of airflow.
Some dryers can exhaust beyond 25 equivalent feet without a booster fan. Dryer Duct Booster Saves significant energy - reduces drying times 50% or more. Reduces lint build-up, dust & fire hazards by maintaining proper velocity in duct runs up to 150 equivalent feet.
A dryer moves a lot of air, and requires a dedicated 4" vent. For two dryers to operate at the same time, you would need a 6" vent. Just as air conditioning ducting gets smaller as it splits off, the two outgoing vents will need to join into a larger vent.
The Smart Splitter has intelligent auto-switching that enables you to conveniently and safely share your 240V outlet at home for EV charging. Effortlessly power devices like your dryer alongside your EV, or even charge two EVs with a single 240V outlet.
Most Electric Dryers are rated at 240 volts. The nominal voltage is 240 volt, but homes may have a 208V, 220V, or 240V power supply. Any appliance that is rated for 240 volts can also be used on a 220V or 208V outlet.
When both are running at the same time, the vent diameter is too small for two machines. AND if you try to install a backflow prevention device it will clog and impede the flow of air. Danger! Each dryer has to have it's own vent.
Dry Vent Rules
Any dry vent must rise at least 6 in. vertically above the flood rim of the fixture before turning horizontally or connecting to a vertical vent pipe. The horizontal run must be sloped to allow any condensation that forms within the pipe to run back to the drain.
Route the dryer vent horizontally to the home's outside wall. Duct work should pitch 1/4-inch per foot to the outside. This keeps moisture out of the pipe. For basement laundry areas where your ductwork will run vertically to the outside wall, you may need to use 90-degree elbows.
Be aware that according to the International Residential Code (IRC), it is illegal to combine dryer ducts with any other exhaust systems within a house. Therefore, the duct for a bathroom exhaust fan cannot be shared with a dryer ventilation system.
If venting two or more appliances on the same flue, you have to know the flue can handle it, as determined but the BTU input and other factors. Both or all appliances have to be on the same floor. So, no furnaces in the basement or room heaters on the second level of your home.
Termination of dryer venting must be to the exterior with a proper hood or roof cap equipped with a backdraft damper. Small orifice metal screening should not be part of the hood or roof cap as this will catch lint and block the opening in a very short time.
By using a 240v splitter, this outlet can simultaneously support an electric dryer and charge an EV, without additional complex wiring or costly upgrades. This dual-purpose use is not only convenient but also efficient, making it an ideal solution for EV owners seeking easy home charging options.
Almost all of the cost of either installing a new 240V outlet, or swapping an outlet of lower power, will come from a pro. You'll need to hire an electrician if you want the job done correctly.
Rather than hiring an electrician to wire a new circuit or worse upgrading your home's electrical panel, the Smart Splitter simply plugs in to an existing 240V outlet to provide two 240V outlets.
DO NOT terminate dryer vents in crawl spaces or attics. Dryer vents that terminate in crawl spaces or attics allow for moisture to deposit and encourage mold growth and health hazards. Dryer vents must terminate outside of the building.
If you want to stack models from different brands or plan to add a vented dryer (not a condenser dryer), you can alternatively opt for a washer/dryer rubber mat or instead mount the clothes dryer to the wall (if mountable). However, using a stacking kit or wall-mountable dryer is advised.
Be sure to keep 90-degree bends to a minimum. Every 90-degree bend is the equivalent of ten feet of vent run. Never install a dryer vent which has a bend greater than 90 degrees. Sharp bends restrict airflow and will lead to excessive lint buildup.
The most common place to vent your dryer is horizontally through the exterior wall near the dryer, which is the ideal placement. Other common locations are through (but not into) the basement or the attic/roof. For most dryer models, you can't run the exhaust duct more than 25 feet from the dryer to the exhaust port.
Venting a dryer through the roof is possible, but there are important considerations to remember. This method can be practical when sidewall venting isn't an option due to your building's layout. However, overall, sidewall venting is considered the safer option.
Improper venting of a dryer typically results in moisture being deposited in various areas of the room. Moist air serves as a breeding ground for mold-and-mildew when it condenses on different surfaces. You want to exhaust the warm air outside the home rather than indoors to properly vent your dryer.