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4340174 Water heating apparatus, water and heating system and improved boiler  
A water heater apparatus is provided comprising a substantially vertical chamber having an upper end and lower end. A lower support plate is mounted inside the chamber near the lower end. A lower...
4315485 Vapor generator for fuels having different flame radiation intensities  
The vapor generator employs a convection heating surface in the gas flue upstream of the superheater heating surface in the exhaust gas flow. The burners for the different fuels are disposed in a...
4169430 Modular heat exchangers with a common flue  
A heat exchanger system for preferably heating water in a space heating system, in which a plurality of heat exchanger units are connected in parallel between inflow and outflow conduits for the...
3035555 Water heaters  
Matches 1 - 4 out of 4