Unical/Lattner Weil-Mclain Lochinvar Triangle Tube HTP Rinnai ...

Attribute
Unical/Lattner Weil-Mclain Lochinvar Triangle Tube HTP Rinnai
Alkon 70 UG 230 Knight WHN 285 Prestige Solo 250 EL220 Q205S
Configuration Wall Hung Wall Hung Wall Hung Wall Hung Wall Hung Wall Hung
Warranty Lifetime 5 Year 12 Year 10 Year 12 Year n/a
Heat Exchanger - Material Aluminum Alloy Aluminum Stainless Steel Stainless Steel Stainless Steel Stainless Steel
Heat Exchanger - Design Single Casting "Mono-Block" Giannoni Coil Vertical Firetube Giannoni Coil Coil
Heat Exchanger - Anodized Yes No No No No No
Heat Exchanger - Welded No No Yes Yes Yes Yes
Heat Exchanger - Counter Flow Heat Transfer Yes No No No No Yes
Heat Exchanger - Heating Surface Variation Yes Yes No No No No
Heat Exchanger - Water Passage Variation Yes Yes No No No No
Heat Exchanger - Water-Backed Yes Yes No n/a No No
Heat Exchanger - Slim Profile Yes No No No No No
Maximum Output of Single Boiler 223,000 Btus 207,000 Btus 265,000 Btus 223,000 Btus 203,000 Btus 189,000 Btus
Maximum Number of Boilers in Cascade 8 8 n/a 4 8 n/a
Maximum Output of Boilers in Cascade 1,784,000 Btus 1,656,000 Btus n/a 892,000 Btus 1,624,000 Btus n/a
Maximum Turndown of Single Boiler More than 4:1 Less than 5:1 Less than 5:1 n/a Less than 5:1 Less than 5:1
Maximum Turndown of Boilers in Cascade More than 32:1 Less than 40:1 n/a n/a Less than 40:1 Less than 5:1
Efficiency in Full Condensing Mode (Thermal) 98.40% 95.40% 96.00% 96.00% 98.00% 98.00%
Integral Pump Yes Yes Yes Yes No Yes
Controls - Outdoor Air Reset Yes Yes Yes Yes Yes Yes
Controls - Cascade Controller Yes Yes Yes Yes Yes No
Controls - Load Anticipation Yes Yes n/a No No No
Controls - Legionaire's Disease Setting Yes n/a n/a No No No
Controls - Boiler Efficiency Optimization Yes n/a Yes No Yes n/a
Controls - Secondary Loop Device Integration Yes Yes (limited) n/a Yes (limited) Yes (limited) No
Controls - Building Management System Integration Yes n/a Yes Yes (limited) Yes (limited) No
Combustion Air - Ambient Yes Yes Yes Yes Yes Yes
Combustion Air - Outside Air Yes Yes Yes Yes Yes Yes
Combustion Air - Concentric Vent Yes Yes Yes Yes Yes Yes
Venting - Material CPVC, PolyPro, Stainless PVC, CPVC, Stainless PVC, CPVC, Stainless PVC, CPVC, Stainless PVC, CPVC, Stainless PVC, CPVC, Stainless
Venting - Maximum Length 100 Feet 100 Feet 100 Feet 100 Feet 100 Feet 80 Feet

Certification CSA CSA CSA ETL ETL CSA
ASME Stamp H Stamp H Stamp H Stamp H Stamp H Stamp H Stamp
Maximum Water Temperature 176° 190° n/a n/a 190° 176°
Maximum Operating Pressure 30 psi safety valve 30 psi safety valve 30 psi safety valve 30 psi safety valve 30 psi safety valve 30 psi safety valve
Skid Packages Yes n/a n/a n/a n/a n/a
Minimum Gas Pressure 3.99" w.c. n/a 4.00" w.c. n/a n/a 4.0" w.c.
Water Content 1.03 gal 1.57 gal 2.40 gal 4.10 gal n/a 1.8 gal
Dimensions -Width 24-1/4" 22-7/8" 18-1/2" 20" 14-1/2" 26"
Dimensions -Depth 10-3/8" 19-1/16" 19" 16" 26-1/2" 15-1/4"
Dimensions -Height 36-3/4" 42-5/8" 33-1/4" 35-1/2" 27-1/4" 26-3/4"
Operating Weight 110 lbs 192 lbs Less than 184 lbs 142 lbs 164 lbs 141 lbs