Heat Transfer Products, a designer and manufacturer of advanced heating and hot water systems, recently presented its new, 94%-efficient ModCon Commercial Condensing Boiler. Especially suited for multifamily residential buildings that must avoid system shutdowns to maintain heat for tenants, the new boiler can combine up to eight ModCon units to handle large heating loads.

The new ModCon is relatively light and easy to handle. Casters are optional for easier movement of the units, all of which have adjustable legs for positioning on uneven floor surfaces. Three models are available with maximum inputs of 300,000, 500,000 and 850,000 Btu/h. Other options include a high and low gas pressure switch, flow switch, alarm bell and vent kit. The 500,000 Btu per hour model, for example, will operate as low as 100,000 Btu/h, saving energy on warmer spring and fall days when the heating load is light and spans just a few hours. It features a high-grade Inconel, load-matching gas burner with a five-to-one turndown ratio, to meet the variable needs for space heating and domestic hot water in a single application.

Using a Dungs gas valve that has been tested to UL, FM and CSA standards, the low-NOx burner on the ModCon boiler offers reliable spark ignition and whisper-quiet operation. Fuel conversion from natural gas to liquid propane or vice versa can be done in the field. According to the company’s press release, other key features on the new ModCon Condensing Boiler include a gasket-less heat exchanger, outdoor sensing with indirect priority, a patent-pending system for collecting condensate, a built-in electronic staging, LED status indicators, remote monitoring and control through a personal computer, and integral low water cutoff.