Building a DIY air conditioner for your tiny house using scrap parts can be a fun and rewarding project. With some basic mechanical skills and readily available components, you can construct a simple yet effective AC unit to keep your small space nice and cool even on hot summer days.

Gather the Necessary Materials

The great thing about this project is that many of the parts can be salvaged from old appliances or purchased very cheaply. Here's what you'll need:

Refrigerant Gas


Copper tubing



Refrigeration oil

Pressure switches, tubing, and fittings


Electrical components

Plumbing the Refrigeration System

Once you have all the parts, it's time to assemble the refrigeration system:

1. Compressor

2. Condenser

3. Filter

4. Evaporator

5. Refrigerant

Adding the Fan

To blow air across the cold evaporator coils and into your living space:

Thermostat Control

To turn the AC on and off automatically:

Powering the Unit

You'll need a power source to run the components:

Performance Tweaks

To maximize efficiency and cooling power:

Safety First

Working with pressurized refrigerant, AC power, and heavy components requires caution:


Constructing your own tiny house air conditioner from scrap parts can be an extremely rewarding DIY project. By salvaging components and following basic refrigeration principles, you can build an efficient cooling system for a fraction of the cost of buying a new AC unit. Just be sure to do your research, work carefully, and prioritize safety throughout the process. Stay cool!