From: "Diehl, Mark" <Mark_Diehl@ATK.COM>
To: "''" <>

Date: Wed, 17 Sep 2003

Under the tutelage of Gene Hedin, my brother, Matt, installed this masonry
contraflow in my then new home in 1999. Here's some statsl:

Heater Type: Masonry contraflow, installed in 1999 by Gene Hedin, Duluth, MN
( ).
Heater Placement: center of home; open design on main living floor; flue
heats bathroom nicely @ top floor.
Flue: Solid firebrick (a second, independent flue services 30" Rumford
fireplace in basement).
Facing: Stone, obtained from fence row on property.
Heating Capacity: heats two floors of 2,000 sq. ft. home.
Home Insulation: R-20 exterior walls, R-40 attic, double-pane windows.
Heating Profile: Firing unit stone cold yields heat (via masonry mass) in ~2
Cordwood Consumption:  3 cords hardwood annually.
Bake Oven: "white" style (no open flames in oven) - holds 350 degrees for 8
Misc:  Rarely have to fire unit twice daily, except during cold spells
(nighttime temps < 10-15 degrees).
Misc:  Electric backup heat pump (set at 55 degrees) has never come on while
unit is fired daily .
Misc: Average monthly electric bill: $20.

I consider myself very fortunate for having come upon both the Rumford and
especially the masonry heater -- and for having the pleasure of meeting

Best regards ... Mark

 Masonry heater roughed in

Gene Hedin and Matt Diehl