|
Sun, Jun 5, 11 at 21:55
| The major tankless water heater manufacturers advertise that you can connect two identical units in parallel to double available capacity. Does that cause the minimum flow necessary to start (and sustain) the heater(s) to double (i.e. half the water always goes through each heater) or does the system keep a valve in the "slave" heater closed until it's needed, so at first all the flow is through the "master"? |
Follow-Up Postings:
|
| If you purchase compatible units and use thier communication cord or package, they will link together and operate in sync with sequential firing. Yes one will close the inlet valve so that minimum flow to activate one heater is not affected. |
|
- Posted by lazypup (lazypup@yahoo.com) on Tue, Jun 7, 11 at 3:13
| Generally in a residential application where you would have enough demand to require two separate tankless you would most likely also have some rather long runs of pipe from the source to the demand. Rather than try to place two units in tandem at one locaton I would be more inclined to divide the loads into two zones and place separate units to handle each zone. That would decrease radiational losses from long pipe runs, help provide a more balanced supply to the demands and would definitely eliminate the need for expensive complex lead/lag control systems. |
Please Note: Only registered members are able to post messages to this forum. If you are a member, please log in. If you aren't yet a member, join now!
Return to the Plumbing Forum
Instructions
- You must be a registered member and logged in to post messages on our forums.
- Posting is a two-step process. Once you have composed your message, you will be taken to the preview page. You will then have a chance to review the contents and make changes.
- After posting your message, you may need to refresh the forum page in order to see it.
- It is illegal to post copyrighted material without the owner's consent.
- HTML codes are allowed in the message field only.
- No advertising is allowed in any of the forums.
- If you would like to practice posting or uploading photos, please visit our Test forum.
- If you need assistance, please Contact Us and we will be happy to help.