Why do some tankless water heaters have two vents?

Power-vent units use indoor air for combustion and simply vent the exhaust to the outside. Direct-vent units pull in air from the outside, so they have two vents for intake and exhaust. Tankless water heaters’ vents can terminate on a side wall because their combustion fan blows exhaust from the units horizontally.

Do tankless water heaters have heat exchangers?

In order to get you that piping-hot shower when you want it, a tankless water heater uses a powerful heat exchanger to raise the temperature. A heat exchanger is a device that transfers heat from one source to another.

Does it make sense to have 2 tankless water heaters?

Adding a second tankless water heater means faster heat and less wasted water, according to the California Energy Commission. Multiple heaters also means shorter pipe runs, so less energy is wasted as hot water travels or cools down in the pipes.

Can you run multiple appliances on a tankless water heater?

The ECO 36 is the largest EcoSmart tankless water heater can provide hot water to multiple appliances running simultaneously so it is recommended as a whole house heater or for other high-flow applications.

Can you vent a tankless water heater and furnace together?

There are two ways to vent a tankless water heater with a furnace. The first is a power vent that uses indoor air for combustion and an outside vent to exhaust gases. This type of venting system doesn’t need an intake valve, but there has to be enough air inside the room.

What is the best way to vent a tankless water heater?

Tankless water heaters can vent through the roof or a side wall, creating more flexibility and options for placement. Traditional gas tank water heater require venting through the roof. Tankless water heaters use fans to blow exhaust from the unit horizontally, allowing vents to terminate on the side of a house.

What is the navien heat exchanger?

It’s made of primary and. secondary heat exchangers with multiple paths of. water pipes on both heat exchangers and inside of the. combustion chamber to minimize heat loss.

Can you take two showers at once with tankless water heater?

In other words, they can only supply so much hot water at a time. Depending on the flow rate of your water heater, you may be able to take a shower and use hot water at the kitchen sink at the same time, but you probably won’t be able to run two showers and the kitchen sink.

Can high-efficiency furnace and tankless water heater share vent?

When installing a High-Efficiency Furnace, the existing shared vent will not work for only the water heater because the vent is too large for the water heater’s exhaust to to warm the pipe enough so it rises safely out of the home. The old vent pipe is too large because it served both the furnace and water heater.

How far can you vent a tankless water heater?

A tankless water heater requires a 4-foot clearance from the side or below a door or window that opens, unless the unit is directly vented to the outside. If the water heater is installed above the door or window, it needs 12 inches of clearance.

What size tankless water heater do I need for a 2 story house?