Recently, with building energy efficiency work,more and more energy efficiency measures have being applied, including variable frequency technology. But when I perform building energy analysis for DOAS-applied variable frequency fan, I find out that the energy saving effect is not obvious. And I think it is because variation range of outdoor airflow is small. Do you think so?

Recently, with building energy efficiency work,more and more energy efficiency measures have being applied, including variable frequency technology. But when I perform building energy analysis for DOAS-applied variable frequency fan, I find out that the energy saving effect is not obvious. And I think it is because variation range of outdoor airflow is small. Do you think so?

Recently, with building energy efficiency work,more and more energy efficiency measures have being applied, including variable frequency technology. But when I perform building energy analysis for DOAS-applied variable frequency fan, I find out that the energy saving effect is not obvious. And I think it is because variation range of outdoor airflow is small. Do you think so?

Recently, with building energy efficiency work,more and more energy efficiency measures have being applied, including variable frequency technology. But when I perform building energy analysis for DOAS-applied variable frequency fan, I find out that the energy saving effect is not obvious. And I think it is because variation range of outdoor airflow is small. Do you think so?

Recently, with Recently,with building energy efficiency work,more work carring out,more and more energy efficiency measures have being applied, including apllied,including variable frequency technology. But when I perform performance building energy analysis for DOAS-applied DOAS applied variable frequency fan, I fan,I find out that the energy saving effect is not obvious. And obvious.And I think it is because variation range of outdoor airflow is small. Do small.Do you think so?so?

Recently,with building energy efficiency work carring out,more and more energy efficiency measures have being apllied,including variable frequency technology. But when I performance building energy analysis for DOAS applied variable frequency fan,I find out that the energy saving effect is not obvious.And I think it is because variation range of outdoor airflow is small.Do you think so?

Recently,with Recently,because of building energy efficiency work carring out,more and more energy efficiency measures have being apllied,including variable frequency technology. But when I performance building energy analysis for DOAS applied variable frequency fan,I find out that the energy saving effect is not obvious.And I think it is because variation range of outdoor airflow is small.Do you think so?