3 ms·
How will you compete with Goodman/Daikin and needing lineset runs with usually high voltage work and panel upgrades that sometimes come with converting to a hea
by spaceguillotine 4y ago
How will you compete with Goodman/Daikin and needing lineset runs with usually high voltage work and panel upgrades that sometimes come with converting to a heat pump.
If you don't use 24V AC controls i don't think it would take off with any installers and you seriously limit and then hinder yourself needing way more customer support.
What refrigerants are you considering as there is more environmental stuff coming out killing 410A.
You will be competing against installers that can offer 10 year warranties (Bosch, Mitsubishi) without any of the backing of a large company saying parts will still be available and that is a big worry with start ups, at least when nest got bought you can still run systems without the cloud or could swap to any 24V controls system.
I used to be an installer but am out of the trades now and I think you'd kind of off the mark with your shortcomings to the current experience, the biggest issue you're gonna find is duct leakage and contractors skipping out on the testing and then the old vac n run and the new construction builders literally will want whatever is cheapest and gets them through the build fastest (80% gas single stage with a empty coil box is hella common)
I hope you have seen the variety of retro installs that will need to be done as there are still lots of oil burners out there.
Honestly i've almost talked myself into the idea that I should be working on this project. LMAO.
Please tell me you aren't going to rely on internet and at least use local RTD sensors at least.
- Panino 4y ago> What refrigerants are you considering as there is more environmental stuff coming out killing 410A. I'm also interested in this. Specifically, I'm interested in R-744 (CO2) as it has a GWP (global warming potential) of only 1. R-32 (Difluoromethane) has a GWP of 675 while R-410A has a GWP of 2088. Japan has had R-744 heat pumps for years now. Drawdown lists refrigeration improvements as the single most effective method (we need to do all of them) for combatting climate change. https://www.drawdown.org/the-book https://www.drawdown.org/the-book
- cmui 4y agoSome background on CO2 systems. On the one hand, great, because CO2 has a GWP of 1 as you point out. On the other, the operating pressures are much higher than other conventional refrigerants (80+bar vs 20bar). Because of this high pressure the components are more expensive, and you don't see any field installs of refrigerant lines like in a mini-split setup. Instead the CO2 systems typically come as factory sealed air-water systems.
- cmui 4y ago24V controls: Any inverter heat pump will run best with a communicating thermostat. We can make efficiency sacrifices to run the system on 24V controls, but it would not be my recommended setup. Refrigerants: this is largely dictated by compressor availability. At this point it looks like R454B is the winner (GWP 467) You're right about new construction builders wanting whatever is cheapest. They don't bear the cost of ownership, so there's very little incentive to go for efficient equipment. Doing replacements on oil is great! The monthly savings when moving from electric resistance, propane and fuel oil are huge. Connectivity - system runs fine standalone without any internet connection. If you decide to get in the heat pump game come say hi at the next AHR expo!