takagi tankless water heater

Nron_13

this is a hot water heater and is not designed to work in a condensing mode , It can be used for combo systems , but not designed for a stand alone heating unit , they are being tested by the Canadian goveerment right now along with the Rinni and Bosh for durability and efficency ill post when I get more information

Adam_12

Has anyone out there seen a Takagi tankless heater used for a hydronic heating system.A salesperson who is marketing them in my area said that they can be used for such an application.For an extra 1000 bucks I can by a Trinity but it got me thinking about potential applications .Not that Iam considering using one for such an application just wondering how one might employ one.Could one employ one to add a redundant feature to an existing system.

Bill Barrett_3

Takagi

I have used them on small jobs. You have to watch your flow through your heater, you'll not be able to get all the BTUS out that its capable of because of the warm return. Do the primary secondary piping, and its a nice modulating alternative.
Bill

bob mandakas

takagi

we sell takagi's we use them mostly for radiant the only thing is you must use a tac 0010 or 0011 for the pressure drop thru the heat exchanger. also be careful with glycol if used if to much is added it can gum up the flow sensor and unit will not fire with less then 3/4 gpm

Jeff Lawrence_25

Tankless unit

I was recently at a customer's that I inherited from another contractor. He had a Takagi installed with a storage tank that was used as a buffer tank to minimize short cycling. The owner told me the system worked well.

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Shaun Anderson

Not too sure on how

exactly the total install went in but the basics were primary-secondary piping. On this contractors installation the tankless was shutting down because of too hot of return water. He has three jobs like that and all are shutting down. The manufacturers rep can't help him out either. We are running into the problem of just replacing them with real boilers. The problem was used on staple-up jobs were temps were too high for the tankless to work properly. Wallies just be careful, you get what you pay for. Hope this helps in a way.

TheFuture

Plumdog_2

I've seen it

and it ain't pretty. The tankless units need to see wide temperature differential and high flow to operate. They are not all that great on combustion efficiency, either. The design is good for some types of domestic hot water production, but does not lend itself to hydronic heating applications. You would be better off with a small fin-tube boiler for the same money.