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 | A wet-base design, a horizontal tube, and a two-pass heat exchanger
makes this one of the best-designed, best-heating boilers on the market.
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| Swing Out burner door
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| The low water content provides heat or hot water delivery within
minutes of start-up.
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| Forced draft burner performs with minimal chimney draft.
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| The compatibility with indirect storage tanks provides enough hot water
to meet the comfort requirement of virtually any home.
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| One-piece boiler construction ensures years of trouble-free service.
There are no push nipples or "O" rings to leak.
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| The compact design saves space, yet it's capable of three firing rates.
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| We reduce servicing expenses by making the heat exchanger easily
accessible from either end.
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| The 85% AFUE rating is among the highest from today's boilers.
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| As with all of our boilers, the low mass boiler is manufactured in the
USA with American-made steel, IBR tested and rated, constructed to ASME code requirements
passing rigorous third-party inspections and hydrostatic tests and is backed by a lifetime limited warranty.
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Now Featuring the
 Why Low Mass?
There is a cost (called standby loss) associated with boilers during
the off cycles. Reducing standby loss means increasing fuel efficiency. The low-mass
concept virtually eliminates standby loss, providing nearly instant heating with less fuel
combustion.
Thermo-Dynamics has combined this low-mass concept with the
ultra-modern technology of high-efficiency, flame, retention burners that produce a
cleaner, more efficient flame. This system ensures maximum efficiency from every fuel
dollar.
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| WATER VOLUME- The low, 5-1/2 gallon water content provides heat and hot water
delivery within minutes of start up. The low mass concept reduces standby losses
associated with boilers during off cycles and provides nearly instant heating with less
fuel consumption.
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| EFFICIENCY - 83% TO 85% AFUE- The high efficiency obtained with the LM boiler are
due to the design to the heat exchanger, a two pass, wet base, Scotch Marine design.
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| MULTIPLE FIRING RATES - .75 TO 1.10- One boiler can be fired at three different
rates, offering versatility and keeping costs low. IBR listed at each firing rate. Each
unit is supplied with nozzles and labels for all three rates.
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| FORCED DRAFT- Forced draft chimney design performs with marginal chimney draft,
assuring proper combustion in spite of poor chimneys.
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| COMPACT SIZE- Standing 19-3/4 inches high, 19 inches wide, and 36 inches long, this
compact boiler not only saves space but can easily be installed in areas not approved for
other boilers. The LM series is approved for both closet and alcove installation on
combustible flooring.
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| ASME CONSTRUCTED AND IBR RATES- Each boiler is constructed and hydrostatically
tested in accordance with ASME Boiler Code. The capacity and efficiency are rated in
accordance with the standards of the Institute of Boiler and Radiator Manufacturers (IBR).
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| LARGER CAPACITIES- The LM 125/150 boiler is available for larger capacities. It
features blended firing rates of 1.25, 1.35 and 1.50 GPH.
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| LIFETIME LIMITED WARRANTY- Unlike other prorated
warranties that often cover a small percentage of the cost of a new boiler after the 15th
or 20th year, Thermo-Dynamics boiler replacement costs are never more than 50% of the
replacement boiler list price.
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| STANDARD FEATURES - The following built-in features found in all Thermo-Dynamics
boilers help increase the longevity of the boiler and make the unit easier to service,
ensuring maximum efficiency and performance for the life of the boiler:
 | Built in "Air Scoop" purges air from the system providing a quiet, trouble
free hot water heating system without the use of external devices.
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| Easy cleaning and maintenance accessibility to combustion areas and the open tubes
make it easy for the service technician to thoroughly clean the boiler. The LM-Series can
be cleaned from either end by simply removing eight brass nuts. The burner and clean-out
door is a hinged, swing-away door. A well-maintained boiler continues to
perform at higher efficiency and is less likely to develop service problems.
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STANDARD EQUIPMENT
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ASME Code Boiler w/Swing Out Door
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Flush Jacket
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Ceramic Fiber Combustion Chamber
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Altitude, Temperature & Pressure Gauge
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ASME Relief Valve
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Built-in "Air Scoop"
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3450 RPM Flame Retention Oil Burner
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Cadmium Cell Primary Relay
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L8148-A Aquastat Relay*
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007 Circulator or Equivalent
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Brass Boiler Drain
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Factory Assembled, Wired & Packaged
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Supplied w/3 Nozzles/Firing Rates
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* May substitute L4006-A Aquastat
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Blended Sizes
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LM/LMD 75/100/110
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LMD-125
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LM 125/135/150
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Model Designation
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LM-75 LMD-75 |
LM-100 LMD-100
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LM-110 LMD-110
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LMD-125
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LM-125 |
LM-135
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LM-150
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IBR Input #2 Oil GPH
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.75
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1.00
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1.10
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1.25
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1.25
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1.35
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1.50
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Nozzle w/Pump 140 PSI
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.65
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.85
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.90
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1.00
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1.00
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1.10
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1.25
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Input MBTU/Hr.
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105
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140
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154
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175
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175
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189
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210
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DOE Htg. Capacity MBTU/Hr.
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90.3
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118.3
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128.6
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150
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150
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160
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174
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Net IBR Rating MBTU/Hr.
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78.5
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102.9
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111.8
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131.0
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130.4
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139.1
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151.3
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AFUE Ratings
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85.2
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84.0
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83.0
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85.0
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85.0
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83.2
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82.0
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LMD only
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LMD only
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LMD only
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Yes
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N/A
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N/A
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N/A
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Water Content (gal.)
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5.5
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5.5
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5.5
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8.0
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8.0
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8.0
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8.0
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"A" Jacket Length
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26"
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26"
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26"
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34-1/2"
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34-1/2"
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34-1/2"
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34-1/2"
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"B" Overall Length
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36"
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36"
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36"
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43-1/4"
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43-1/4"
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43-1/4"
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43-1/4"
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Shipping Weight (lbs.)
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300
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300
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300
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400
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300
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390
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390
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* For LMD Series add
10lbs. to weight.
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