Viessmann Vitodens 200-W 352,000 BTU Gas Fired Condensing Boiler less Manifold - B2HAH65

Outfit Your System With Viessmann B2HAH65 Vitodens 200-W 352k BTU Multi-Boiler Package (Less Manifold)

Need serious heat with built-in redundancy for large homes or light commercial spaces? The Viessmann B2HAH65 package delivers two wall-hung Vitodens 200-W B2HA 352k condensing boilers for high output, quiet operation, and reliable staging—without the factory manifold, so you can build your own primary loop to suit the job.

• Brand: Viessmann
• MPN: B2HAH65
• Type: Two-Boiler Package (Less Manifold), Gas-Fired Wall-Mounted Condensing Boilers
• Size/Capacity: 2 × 352,000 BTU/h input (704,000 BTU/h total)
• Material/Finish: Stainless-steel Inox-Radial heat exchanger; MatriX modulating cylinder burner
• Performance: Up to 94.5% CSA thermal efficiency; modulation up to 6.5:1 per boiler; altitude operation up to 10,000 ft
• Connections/Fit: Direct vent (coaxial or two-pipe); max vent runs up to 131 ft (layout-dependent); common venting up to 4 boilers; 120 VAC, 60 Hz
• Included: Two Vitodens 200-W B2HA 352k boilers; no prefabricated manifold/header (package is “less manifold”); controls/accessories vary by configuration—see manual/price list
• Certifications: ASME Section IV & CSA B51 construction; tested to AHRI BTS-2000; NG/LP convertible
• Warranty: Viessmann limited warranty; terms vary by application (see manufacturer)

Save Fuel With High Efficiency

The Vitodens 200-W line is rated up to 94.5% thermal efficiency, helping cut operating costs while delivering consistent comfort across large zones. Staged firing further reduces short-cycling and fuel waste.

Everyday Performance You Can Feel

Each boiler modulates up to 6.5:1 for smooth, quiet heat delivery. Running two units provides 704k BTU/h total input and built-in redundancy—ideal for critical spaces that can’t go cold.

Built To Last

Viessmann’s Inox-Radial stainless-steel heat exchanger and MatriX cylinder burner are engineered for durability, clean combustion, and low maintenance over years of service.

Installer-Friendly Flexibility

Direct-vent options (coaxial or twin-pipe) with long permitted runs, plus support for common venting up to four boilers, streamline vent design. “Less manifold” lets you configure your own primary loop and headers for custom hydraulics.

Smart Controls & Compatibility

Vitodens 200-W supports advanced outdoor reset and cascade control architectures to coordinate multiple boilers and mixed-temperature circuits—so the plant runs efficiently across changing loads.

Want to learn more about this boiler? Read more about it in our article on the best steam boilers.