https://www.openlearning.com/u..../greendennis-slpj66/
https://kennedy-taylor.technet....bloggers.de/why-elec
Patio Electric Heater Patio electric heaters are the modern method of extending outdoor living spaces. Electric models do not emit carbon monoxide and can be installed in enclosed spaces with no ventilation. Calculate the cubic footage and the desired temperature increase to determine the power (BTUs). Power Patio heaters can keep outdoor living spaces comfortable and war