Indus
Products
Background
When one of Europe’s largest manufacturers of heat pumps expressed an interest in using our coils for their products, we were understandably excited about the opportunity.
Problem
The client used heat exchangers with Fin geometry 25.4 x 19.05 using 5/16” tube diameter. Indus did not have tooling to manufacture this geometry. A further challenge was that the fin spacing given was very narrow.
Solutions
But rising to the task at hand, the engineering team devised clever designs that addressed all the problems while staying within the constraints. We redesigned and re–engineered the heat exchangers with an Indus geometry, taking care to ensure that the overall size was still the same, even though we were using fins of a different size 25.4 x 15.875 x 5/16”.

We utilized the Tsunami Fin design for the project. When tested by the clients, the new improved design was found to have 2 ~ 4% higher capacity, and also showed a reduced air pressure drop. The Tsunami fin also had a lower fin width than the design that the client was then using, thus leading to lower energy costs.

Needless to say, the client was pleased with the new coils and we are now one of their major suppliers.
Background
Our customer is a large, reputed and over 100 years old organization in the Air-Conditioning industry. They approached us to design a complex coil for commercial HVAC application.
The application needed 7 circuits of cooling & 3 circuits of heating, culminating into four complex headers. All to be accommodated in a very small space of 10 tubes per row and 5 rows only.
Problem
The complexity, both from design and manufacturing perspective was that there were 4 headers having intermingling connections. Everything had to be contained in a very small space of 10 tubes per row and 5 rows. This left almost no working space.
The design had to consider the manufacturing feasibility. This was complicated further as the customer could not afford luxury of time to develop any new tooling.
Solutions
Using its vast experience in designing, manufacturing and assembling various coils with complex 3-Axis bent headers with stringent dimensional tolerances, Indus developed the headers & circuiting along with the complete coil in 3D, taking into account existing manufacturing constraints and ability.

Indus coils with the complex header connection were manufactured and delivered to the customer and were found to be a perfect fit at the customer end. This truly was a daunting task to design and execute the coil with all the minute details. There was no delay in supply due to any rework, redesign, development of new tooling, etc.