The H range is smaller type designed to serve domestic installation, for example for each household at condominiums. An internal relief valve is optional for H5 range. The C range is a compact regulator for commercial, industrial, and large domestic installations. This is also best selling product to be equipped in commercial burning equipment typically on a pilot line of steam boilers. The G & GL range is a high capacity regulator mainly for commercial and industrial installation. Wide interchangeable spring selection is available for various installations and requirements.