Viessmann Vitodens 200-W B2HE-85 Condensing Boiler, 85,000 BTU

A Vitodens 200-W wall-mounted gas condensing boiler for residential hydronic heating, the B2HE-85 fires from 8.5 to 85 MBH at 95% AFUE. Integrated WiFi and a 7-inch color touchscreen handle control, and an indirect tank can be added for domestic hot water.

With up to a 14:1 turndown, the burner can drop to a low firing rate as heating demand falls, cutting short cycling and holding room temperatures steady. A stainless Inox-Radial heat exchanger and MatriX-Plus burner, overseen by Lambda Pro combustion control, keep combustion clean as gas quality changes, and efficiency can reach 98% at full modulation under suitable conditions. It is equipped with a high-efficiency ECM pump.

Net AHRI output is 70 MBH. The boiler takes natural gas or liquid propane through a 3/4 in. NPT gas connection, uses 3/4 in. NPT heating connections, runs on 120V, 60 Hz and has a 45 psi maximum operating pressure. Outdoor reset and multi-circuit control are supported, and the ViCare app allows remote monitoring.

Highlights

• 8.5-85 MBH input range with up to 14:1 turndown

• 95% AFUE, up to 98% efficiency at full modulation in suitable conditions

• 70 MBH net AHRI output

• 7-inch color touchscreen, built-in WiFi and ViCare app support

• High-efficiency ECM pump

• Pairs with an indirect storage tank for domestic hot water

Specifications

Good to know

• Gas-fired appliance: it must be installed, vented and commissioned by a qualified installer in line with local codes and the manufacturer's installation manual.