The design of a home heating system is a complex process because many variables need to be taken in consideration and simply because the whole system is made of other smaller subsystems that need to be sized correctly for each specific case so that the system performs as requested for a long period of time.

Here I have designed the heating system for my home according to the official standard for doing that in my country. I have documented the whole process but again it is all written in Macedonian language and I am working on having it translated, however maybe looking at the formulas and the process overall can help you understand what it is all about.

To simplify the whole thing for those reading this post, the project is separated in a few sections and those are:

- Finding the physical dimensions of the object that needs to be heated
- Finding out the physical properties of the walls, floors, windows, doors and roofs so that the heat transmission coefficients can be calculated for the heat loss calculation, so we know how much heat escapes the object
- Determining the temperatures to which the rooms need to be heated
- Determining the type of heating system that will be installed
- Calculating the heat losses for each room and summing them up so we know how much heat per second we will need to replenish in order to get the desired temperature – this calculation is used to find out what capacity the boiler needs to be
- Then we draw rough schematic of the hydraulics to find out their length, the number of knee elements, T elements which we will use for the hydraulic calculations
- Next we do the hydraulic calculation which helps us find out the losses of energy in the pipes to figure out how large of a pump we will need for this case
- Knowing the size of the pump, the length of the pipes and the boiler capacity we can make a bill of materials, order parts and start installing the system
- During this whole process we need to follow the necessary standards in order to comply with the general rules of how this systems should be built, some of those standards include the temperatures for each room depending on its application

Because I am already familiar with SolidWorks, I drew all of this stuff using that software – however, many people recommend AutoCAD as the software for this kind of work.