Definitely hire someone local to look at this.
99.99999999999% of users here would assume CFM in relation to HVAC means cubic feet per minute. Including people living in the metric World.
You should hire a technician to investigate and take measurements. There is a chance an engineer is required to determine what is wrong and what the solution is.
I have no idea what "CFM over amping" means. Too much current at a given cfm? How was it measured and who determined what is too...
What is actual flowrate?
Design in residential often just means someone just looked at a number on the unit to "see" 900 cfm, and attached duct to match the size of the duct connection of the unit.
Inefficient fittings (elbows, Tee) likely causes more whistling than just the straight duct.
IMHO, freeze protection is the only valid reason for glycol. The pH buffers, oxygen scavengers, and corrosion inhibitors can be added to regular water as well.
The most important thing you can do to protect from corrosion is to provide good de-aeration and not use open interfaces (e.g...
So the reason for the need of glycol disappeared? what else changed?
This should be possible and performance of the existing system should improve. You have to make sure water in the chiller doesn't get too cold.
you have to hire an engineer to analyze the existing system and determine what...
You should list the location to find someone to help with requirements in YOUR jurisdiction.
It sounds lie whoever made the plans wasn't detailed or accurate enough. during plan review, AHJ can request clarification and changes. So the design team should accomplish to the to satisfaction of...
Talk to the owner about what their expectation is and what they think when the equipment runs. if there is water, you need to provide heating for at least freeze protection.
What about if the equipment is down for repair?
Do NOT rely on space heaters they need to plug in. Those are a fire...
I doubt companies waste time posting positions if they don't want to hire at all. But there is the chance they MAYBE have budget for a position, and that budget falls apart. For example, a company plans to expand into a new product, but a few months later decide not to. So they don't end up...
Don't be shy to apply to jobs where you don't meet ALL requirements. The listed requirements are a wish list for an ideal candidate. Sometimes that person doesn't exist or wouldn't work for that company. They very often end up hiring someone who they think has the potential to become that...
I think your goal is too ambitious. With only 2°C dT, this is as good as it gets. to get to less than dT of 2°C, you would have to get closer to infinite flow. If you keep your houses at 28°C, you just have to live with warm electronics. Normally the air used to cool is 10+ °C colder than what...
What country or market are you in? How closely did those jobs match your qualification? Was it private employers, or public or what type? What type of work (design or what?). Do you have knowledge in the typical design software like Revit?
Did they tell you about the process? For example, did...
A heat pump is a heatpump. Thermodynamics are the same. Efficiency mainly depends on the lower and higher temperature (plus heat exchanger capacity, compressor/motor efficiency, type of refrigerant). Thermodynamics doesn't give a hoot if the person installing it is in a Plumbing or HVAC union...
Heatpump is the new fashion word. Like "hydrogen". It all sounds good until someone with knowledge in thermodynamics looks at the details....
Heatpumps CAN be great, but only in the right application.
If you are in a cooling climate where you air-condition most the year, those can make sense. The room they are in need to be coupled to the rest of the house (i.e. not in garage or a small sealed room).
They also could work in a non-freezing climate where you have the water heater in the...
What are you running in your HOME? Are you crypto mining, or what?
If it draws 1.2kW, it dissipates 1.2kW (minus what dissipates in the spaces if you have PoE)
imagine running a 1kW space heater all year, that closet would be extremely hot. I doubt you actually draw 1.2 kW. But I don't know...
