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80 Commercial Gas Oil Boiler

  • Field convertible flue
  • Available as knockdown or packaged, water or steam and with or without a burner
  • Jacket side panels lift off for easy installation - no tools needed
  • Commercial light oil, gas and gas-light oil boiler
  • 83.2% Thermal Efficiency

Technical Data

Model Input Light Oil (MBH) Input Gas (MBH) Gross Output (MBH) Net Steam (Sq. Ft.) Net Steam (MBH) Net Water (MBH) Oil Combustion Efficiency (%) Gas Combustion Efficiency (%) Oil Thermal Efficiency (%) Gas Thermal Efficiency (%) Flue Outlet Diameter (In.) Boiler Water/Steam Content (Gallons) Approx. Shipping Weight (Lbs.)
380 336 346 278 867 209 242 85.3 82.7 82.7 80.2 8 37.5 1,058
480 476 491 396 1,238 297 344 85.5 82.9 83.2 80.7 8 49 1,203
580 623 639 515 1,608 386 448 85.1 82.6 83.1 80.6 8 60.5 1,448
680 770 787 634 1,983 476 551 84.9 82.3 83.1 80.6 8 72 1,843
780 910 935 753 2,354 565 655 84.7 82.2 83.1 80.6 10 83.5 2,088
880 1,050 1,082 872 2,725 654 758 84.6 82 83 80.6 10 95 2,317
980 1,190 1,230 991 3,096 743 862 84.5 82 83 80.5 10 106.5 2,678
1080 1,344 1,378 1,110 3,471 833 965 84.4 81.9 83 80.5 10 118 2,923
1180 1,484 1,526 1,229 3,842 922 1,069 84.4 81.8 83 80.5 10 129.5 3,068
1280 1,624 1,674 1,348 4,242 1,018 1,172 84.3 81.8 83 80.5 12 141 3,313

Ratings & Reviews

Rated 4 out of 5 by from Followup to prior willis review Posted my original remarks in the commercial area. Should have been in residential for Ultra 80. But anyway, WM tech, Rick, gave call. Walked me through some adjustment steps. So far no ignition fault errors. The whole problem may have been from inadequate installation settings from contractor. I noticed contractor wasn't listed on WM's website later. Sorry part is contractor should have been contacting WM instead of me. Fired contractor. Adjustment included one counter clockwise turn to venturi valve and changing model type from 80 to 80HA (high altitude). I'm not HA, but if it resolves my issue I'm fine. Wish I had been in contact sooner with tech. Thrown a lot of post installation money into unit. I'd probably recommend if contractor was listed on WM website. I'm satisfied the mfg helped me. Very grateful! That alone says something.
Date published: 2017-03-01
Rated 1 out of 5 by from never runs when it gets cold out This product Always quits when the temp get below 50 degrees F an the setting an not right at all who ever built the one we have needs to be fired
Date published: 2016-12-26
  • y_2017, m_5, d_19, h_8
  • bvseo_bulk, prod_bvrr, vn_bulk_1.0.0-hotfix-1
  • cp_1, bvpage1
  • co_hasreviews, tv_0, tr_2
  • loc_en_US, sid_80-commercial-gas-oil-boiler, prod, sort_[SortEntry(order=RELEVANCE, direction=DESCENDING)]
  • clientName_weil-mclain
  • bvseo_sdk, p_sdk, 3.2.0
  • CLOUD, getReviews, 107.74ms
  • REVIEWS, PRODUCT
80 Commercial Gas Oil Boiler is rated 2.5 out of 5 by 2.
Rated 4 out of 5 by from Followup to prior willis review Posted my original remarks in the commercial area. Should have been in residential for Ultra 80. But anyway, WM tech, Rick, gave call. Walked me through some adjustment steps. So far no ignition fault errors. The whole problem may have been from inadequate installation settings from contractor. I noticed contractor wasn't listed on WM's website later. Sorry part is contractor should have been contacting WM instead of me. Fired contractor. Adjustment included one counter clockwise turn to venturi valve and changing model type from 80 to 80HA (high altitude). I'm not HA, but if it resolves my issue I'm fine. Wish I had been in contact sooner with tech. Thrown a lot of post installation money into unit. I'd probably recommend if contractor was listed on WM website. I'm satisfied the mfg helped me. Very grateful! That alone says something.
Date published: 2017-03-01
Rated 1 out of 5 by from never runs when it gets cold out This product Always quits when the temp get below 50 degrees F an the setting an not right at all who ever built the one we have needs to be fired
Date published: 2016-12-26
  • y_2017, m_5, d_19, h_8
  • bvseo_bulk, prod_bvrr, vn_bulk_1.0.0-hotfix-1
  • cp_1, bvpage1
  • co_hasreviews, tv_0, tr_2
  • loc_en_US, sid_80-commercial-gas-oil-boiler, prod, sort_[SortEntry(order=RELEVANCE, direction=DESCENDING)]
  • clientName_weil-mclain
  • bvseo_sdk, p_sdk, 3.2.0
  • CLOUD, getContent, 74.1ms
  • REVIEWS, PRODUCT