Sealed combustion tankless water heaters

[Sarah Holland/David Foley <hollandfoley@acadia.net>]

Mike Rogers wrote:

> There are "sealed combustion" hot water heaters.  By sealed combustion, I
> mean that that combustion air is completely isolated from the interior--thus
> combustion air is drawn directly from outside and exhausted directly
> outside.  No mixing with, or use of, interior air.
> 
> By direct venting, I mean only that the exhaust air takes the shortest way
> out, usually horizontally through a side wall.  Direct venting may, or may
> not, be sealed combustion.
> 
> Again, there are sealed combustion hot water heaters, but I'm only familiar
> with tank models.  I have not found a tankless sealed combustion unit yet.
> I haven't seen the Myson that Speireag mentioned, hence my question.

There are sealed combustion, tankless units which also function as boilers
(for space heating).  Examples include the "Monitor" models MZ25S, MZ25C and
MZ40C, from Monitor Products, Princeton, NJ (732) 329-0900 xt 19; and the
"Ocean Idroclima" series, based in Italy +39-0424 517111, email
info@ocean.idroclima.com.  This company makes several models, including one
for large-volume domestic hot water production.

Our friend Dr. Vasile would urge everyone not only to consider the hot water
source, but also the possibility of capturing the wate heat from the hot
water as it runs down the drain.
-- 
Holland & Foley Building Design
232 Beech Hill Rd.
Northport, ME 04849 USA
p: 207-338-9869 f: 207-338-9859 e: hollandfoley@acadia.net