# 2025 Symposium - Chiller Talk

## Introduction : time: 2 minutes

![intro](./img/gif/intro.gif)

- Who am I
- Why I'm here
- Brief interests

## Reason for talk : time 3 minutes

### Refrigerant Changes

High odds we'll move to flammable refrigerant (10-15 year speculation)

### Get comfortable

- Help get comfortable with the idea of using chillers in residential markets.
- Draw similarities and differences between current equipment.

### Pros / Cons

## History : time 5 minutes

It would be good to explore a little of the history of hydronic systems here maybe just touch on my
companies history, idk ??

## Concepts : time 9 minutes

An introduction to some of the concepts and similarities. Start building a pros / cons list that we
can go through at the end.

### What do we do? (audience participation) time: 1-2 minutes

What's the primary objective of HVAC?

- Provide healthy, safe, and comfortable environment.

We move heat from one place to another, generally through refrigerant and air circulation... Water
_IS_ a refrigerant. (could perhaps nerd out on specific heat, air = 0.24, water = 1.0, refrigerat=??
[high that's why we use it, gonna depend on the blend])

- Add specific-heat of water to the pro's list here, maybe also to cons when compared to refrigerant
  ??

### House Complexity : time 1-2 minutes

A home is made by harmony between many different mechanical and physics driven systems.

- Shell / envelope
- Ventilation / exhaust
- Electrical
- Plumbing / hot water
- HVAC
- and more...

HVAC covers / is the realm of a lot of these systems.

### System Complexity : time 5 minutes

- Show a well designed traditional system here (fresh-air, dehumidification, inverter, etc.).

  - we do not want to get rid of moving air, so these will still apply
  - talk about things like filtration, safety switches, controls / thermostats, inverter boards.

- We have to design the distribution system.

  - Explore the idea of infrastructure vs. the plant here.
  - The infrastructure piece will likely have a longer life expectancy (pro)
  - More upfront cost design / materials (con)
  - glycol in cold climates
  - piping systems are fun / works of art (pro/con)

- Inherent mis-trust for things we don't understand / are used to. (big, con?)

## Chiller / Heat Recovery Concepts : time 15 minutes

**The meat and potatoes of the talk, most likely**

- Show cool things that are _unlocked_ with using water.
  - ability to dump heat into other sources, such as pools
  - ability to incorporate different heat sources (dual fuel, pellets, wood, etc.)
- Introduce the concept of heat-recovery and dhw generation.
  - unlocks dehumidification with a high COP
- Puts more eggs in one basket (con)
  - can be stacked / redundant (pro)
- Over sizing less of a problem (buffer tank concepts)

## Pro's and Cons : time 10 minutes

Build and go over a pro's and cons list, this has hopefully been built up live with crowd engagement
through the talk.

## Questions / Outro : 5 minutes