Electric and wood boiler combination

[Bullet]

Does anyone know where I can get a diagram of a combination wood and electric boiler ? I am replacing my oil boiler with an electric .

 

[Hunderliggur]

Do you have you own waterfall and hydropower? I can't imagine changing to an electric boiler. I have a wood gasser and a Rennai propane backup. To get 100,000BTU/hour in electric resistance? That's a lot of juice (29.3KW= about $3.00/hour around here)

 

[Bullet]

Do you have you own waterfall and hydropower? I can't imagine changing to an electric boiler. I have a wood gasser and a Rennai propane backup. To get 100,000BTU/hour in electric resistance? That's a lot of juice (29.3KW= about $3.00/hour around here)

The electric isn't as bad as oil . I will only be using the electric as a back up . I already have an electric boiler bought . 18kw unit . My neighbour has one and is quite pleased with it . He isn't into burning wood so the electric is the only thing he has . He got rid of his oil boiler a couple of years ago .

 

[easternbob]

I am using an elec. boiler as the backup to my wood boiler. Only used it once while we were away on vac. last winter. The elec. boiler is just plumbed into the primary loop (primary, secondary loop system) with close spaced T's. We were building a new house and choose to install the elec. boiler, I hope to never use it and the install was quick and easy.

 

[Sting]

Nothing quite as safe and reliable as a resistance driven appliance. Good choice. Consider two separate boilers, plumbed in a primary secondary configuration.

 

[maplewood]

I've got a 20 KW electric boiler as a back up for my Econoburn. I don't even turn it on. It's in a loop valved off of my primary.
I leave one valve open, as the electric boiler is higher than my primary loop, and I can bleed off air easily from that high point.

 

[Bullet]

I know this may sound stupid but what do you guys mean by the primary and secondary loop ?

 

[vvvv]

the boilers dont pump/flow thru each other

 

[easternbob]

Bullet,
Check out the sticky on the main page (at the top), there are a ton of posts describing primary/secondary (along with diagrams which is the best way to describe it).

 

[Bullet]

the boilers dont pump/flow thru each other

If the boilers don't flow through each other what keeps the wood boiler from over heating when the zone valves aren't opening for heat ? In my current setup the wood boiler circulates the water through my oil boiler and back through the wood boiler until one of my zones calls for heat . I know the damper closes but wouldn't the wood boiler still get hotter if the water wasn't being circulated ?