Weil-Mclain Ultra Gas Boiler

Comparable Boilers: Ultra Boiler Manual (pdf)

The Weil McLain Ultra is a condensing gas boiler that continuously monitors and adjusts to the most comfortable air and heating rates. This furnace is Energy Star rated with an AFUE between 92 and 93.3% for regular conditions and 98% for conditions related to low temperatures. It is a two-stage induced draft boiler that has what Weil-Mclain call "integrated PhD (Precision Hydronic Data) Technology", a system that "initiates efficient and ongoing hydronic heating". The design of the Weil McLain Ultra gas boiler is CSA certified.

Weil-Mclain Ultra Model Numbers

The Weil McLain Ultra gas boiler has an upflow, downflow, or horizontal airflow, depending on where the unit is placed within the home and the measurements of the living space. Some of the models in the series and similar series are distinguished by their min/max CSA MBH capacity:

  • Ultra 80: 16/80 MBH
  • Ultra 105: 21/105 MBH
  • Ultra 155: 31/155 MBH
  • Ultra 230: 46/230 MBH
  • Ultra 310: 62/310 MBH

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Word of Mouth

Comments about Weil McLain gas boilers on HVAC-Talk message boards and heating contractor sites are generally positive:

  • In one hvac-talk.com forum, one service tech says that the circulator problem on one Weil McLain furnace is due to a bad motor. Heat is strong in every location except one. This heater is strong and persistent, but the circulator requires attention.
  • In another hvac-talk.com forum, another tech observes that the Weil McLain boiler works very well, especially through 3-way valves, and produces considerable heat. A couple of other forum guests agreed with this assessment.
  • In this hvac-talk.com forum, both techs and guests agree that Weil McLain provides good multiple relay distribution, providing that the circulator and thermostats are up to par.

Warranty

Weil McLain boilers have a 15-year limited warranty on residential models with a 5-year "ultra" protection plan (HPP). The limited warranty on commercial models is 15 years, without the "ultra" protection plan.