Blog

Refractory Castings

January 30th, 2010

door flange installed

Masonry Heaters…

November 24th, 2009

Heat-storing fireplaces have been built for centuries in Scandinavia, Austria, Germany, and Russia. The heat from a hot fire is transferred to the masonry mass which can then radiate for 24 hours or more.

A Masonry Heater…

  • burns a load of wood fast and clean, in excess of 1500F degrees, meaning very low emissions, maximum combustion efficiency, and zero creosote.
  • stores heat from the complete combustion of wood in the ceramic core and in the masonry facing.
  • radiates heat all day from one short burn.
  • is made entirely of ceramic and stone, and the warmth is just like sunshine.
  • is a unique work of art hand crafted by a local mason.
  • can be made of a wide variety of materials including brick, fieldstone, Soapstone, Granite, and Ceramic Tile.
  • can be designed to heat over 2000 square feet of living space.
  • heats long after the fire goes out, so you can leave the house or go to bed without concern for an untended fire.
  • can incorporate hot water, baking, cooking, and a heated bench.
  • will not dry the air, or circulate dust particles.

PRODUCTS and SERVICES

November 24th, 2009

door flange installed

PRODUCTS

Masonry Heater Cores-  We are the only makers of prefabricated masonry heating components and kits in Vermont. We manufacture masonry stove cores and we are located on Fuller Road in Newbury.  Our cores are modeled after a centuries-old heat-storing radiant fireplace design from Finland.

RW Refractory Products are designed for high efficiency, performance, safety, easy installation, and design flexibility.  The firebox walls and floors in our heaters are replaceable.  We use a Refractory Castable that is rated to 2,400 Degrees Fahrenheit and apply the strictest of standards to our casting process.

RW16 MASONRY HEATER CORE SPECIFICATIONS

FIREBOX SIZE 16”Wide X 20”Deep X 16”High
RECOMMENDED LOG LENGTH 16”
STANDARD FUEL LOAD 45 LBS.
CORE DIMENSION 32”W X 20”D X 6.5’H
FINISHED FIREPLACE DIMENSION 40”W X 28”D X 7’H
OVEN DIMENSIONS 17”W X 17”D X 7”H
BAKING OVEN TEMPERATURES EXCEEDS 500F DEGREES & REMAINS  AT OR ABOVE 350F DEGREES APPROX. 8HOURS
RECOMMENDED FLUE CONNECTION 8”X8” OR 8” ROUND
CORE NET WEIGHT APPROX. 2200 LBS.
AVAILABLE OPTIONS
STAINLESS STEEL DOMESTIC HOT WATER COIL
BENCH CONNECTION
SIDE-VENT
CORNER CONFIGURATION
BASEMENT ASH CHUTE
BASEMENT/OUTDOOR AIR INTAKE
STANDARD CORE KIT INCLUDES
36 PRECAST REFRACTORY MODULES
CERAMIC FIBER GASKET
REFRACTORY MORTAR
1.25” FIREBRICK FIREBOX LINER
CHANNEL CLIPS
CAST IRON FIREBOX GRATE

Masonry Heater Hardware- We sell Cast Iron Masonry Heater Hardware from Pisla Finland.  We also fabricate custom harware including dampers and doors. Please call for a complete catalog.

Refractory Products- We have a limited stock of refractory castables, firebrick, insulation, gaskets, and mortars.

SERVICES

heat services .

Custom Refractory Castings- Our shop includes a mechanical mixer and a vibrating table.

Refractory Core Installation-  In addition to our “core” products, offer core delivery and installation within Vermont, New Hampshire, Maine, and Massachusetts.

Stone Fabrication- Soapstone, Granite, Cut Fieldstone, Cast aesthetic Concrete, and Ceramic Tile prefabricated blocks for use with our heater cores.

heat services 2


DRURY BRICK STOVE NEWBURY VT

November 20th, 2009

ready for granite cap

November 19th, 2009

Locally Salvaged Drury Brick

November 2nd, 2009

10.09.09.roywood.flyer.fin

Roywood Masonry Stove Core RW22 Update

November 2nd, 2009

We have been making forms for various options related to our Core22 model including rounded downdraft channels and a corner configuration.  The firebox is 22.5″ deep, and 18″ wide.  The core is intended to heat 2000+ square feet of living space with a 4-6″ masonry skin.  Engineered to be installed with standard 2.25″ X 4.5″ X 9″ firebrick, we think this set of 24 precast refractory modules will simplify  masonry heater core installation.  We recommend HiHeat High-Duty brick in the firebox, and low or medium duty brick above the throat.

good night moon

See thru Core

November 2nd, 2009

Our Current Project is a See-thru Stove in Fairlee, Vermont. The downdraft channels have been altered to allow for roundness of the masonry skin. A 6.5′ heated bench connects the stove to the chimney.

see thru

Bradford LEAF Energy Fair

November 2nd, 2009

Energy Fair

We had a great time again this year at the Local Energy Alternatives Fair in Bradford Vermont.  Thanks Brad and Linda!  We set up a core, spoke with homeowners, builders, architects, and made many great connections.  See you next year!

What is Thermal Mass?

August 15th, 2009

The ability of a material or structure to absorb heat energy is called Thermal Mass.

High density materials such as stone, concrete, bricks, and tiles require a great deal of heat energy to change their temperature and are therefore said to have high thermal mass.

Thermal mass acts as in the same way as a battery, except that is stores heat instead of electricity.

Thermal mass stores and re-radiates heat.

from David Darling’s Encyclopedia of Alternative Energy