Heating and ventilating system for poultry houses

Abstract

A heating-ventilating system including an air duct adapted to be installed in an exterior wall of a poultry house and having a fan mounted near the interior end of the duct and a fuel burner mounted in the duct upstream from said fan, the fuel burner being adapted to burn fuel efficiently in the high velocity air flow provided by the fan; an igniter including an electric spark generator for igniting the burner in response to an electrical signal, a first stage fuel control valve and a second stage fuel control valve with the main fuel control valve responding to a flame sensor and to a thermostat in the interior of the poultry house and the second stage fuel control valve responding to a second independent thermostat; a control for the fan which operates the fan alone in response to a warmer than desired temperature in the poultry house, which causes the fan to turn off at a desired temperature range in the poultry house, and which causes the fan to operate in conjunction with the fuel burner for lower than desired temperatures.

Dependencies are inferred from the claim text.