upgrade from gravity HW

Steamhead (in transit)

an intermediate heat exchanger between the boiler and the indirect would suffice.

<A HREF="http://www.heatinghelp.com/getListed.cfm?id=367&Step=30">To Learn More About This Professional, Click Here to Visit Their Ad in "Find A Professional"</A>

Buzz G.

X-contamination of potable water

All install drawings show boiler water in IDHW coil. On old system with contaminated water, can you still do that?
Old system expose to mercury in Honeywell Heat Enhancer so would sure not be good for HW.

Mike T., Swampeast MO

The Honeywell Heat Generator allowed gravity systems to operate at temps higher than 212F without the possibility of steam being produced. How? By pressurizing systems that previously were directly open to the atmosphere. The benefits were dual--not only could smaller than normal piping be used (higher temp differential that DRIVES gravity), but the rads themselves could be somewhat smaller (higher possible temp).

In the event of a runaway boiler, the greatly increased pressure inside the Heat Generator would move the mercury inside the Heat Generator such that a path was opened to the atmosphere. Thus, no BOOM!!!--just really hot water or even steam coming out of the relief pipe on the roof. The mercurcy however will NEVER be able to enter the boiler--at the absolute worst it would be ejected out the roof relief.

While I suppose that some tiny amount of the mercury in the generator does dissolve into the space heating water over decades, you have the DHW heat exchanger coil to separate the two "different" waters. Frankly, I'd worry FAR more if I had a mouth full of silver-mercury fillings...

Buzz G.

Mercury

When old boiler removed-4000 lbs 8 sections-there was some mercury in pipe from the Enhancer and had to have cleaned up even tho Enhancer has not been moved etc. Somehow it did get over.

Buzz G.

Heat exchanger

with Knight 210 what HX size will I need? Will it make me change circ from boiler?

Buzz G._2

Mercury Spill

Relooked at the drawings of Heat Generator -mine was piped out laterally to the boiler base return piping without going up and then down. Can see how sudden drop in pressure (like drain opening) could bump some into the boiler base or at least that lateral piping. Probably the cause of my spill. Watch out if removing and not piped overhead initially.