Greenway

 

 

 

 

 

 

 

More DAS Data ERV Temperature vs Rooms and Outside HVAC Activity and Cost NZ$ Bedroom Temperatures 1-11-2020 Bedroom Humidity 1-1-2020

  Smart control: - reduces power costs of air handling units - adjusts ventilation to your everyday needs - provides a wide range of control options It has been estimated that smart control allows to half the average cost of electricity for ventilation. Air Quality Hubiat Prototype 1 of control system

 Matt Resinger on youtube has a lot of videos about the subject. He’s a custom home builder, so he does favor the more expensive materials. But he’s also very focused on making sure things last a long time. I find a lot of his stuff interesting. Here’s one where Matt talks ERV vs HRV Here are a couple This Old House videos on the ERV subject: Seeing it work with smoke bombs A discussion on indoor air quality

Encouraging results  from logged data. Very stable internal environment in the house.  Energy use for Greenway Room temperatures All rooms are very similar so the heat is being distributed evenly it seems.  Room humidity Very important as we are still having col mornings the humidity is also very well distributed.  

I do want to increase the maximum flow rate for the inlet so an additional fan in the inlet filter should help overcome the blockage in the filter its self and heat exchanger core. New filter fan to be placed in the inlet duct. Its in a Sistema box that fits the following filter almost perfectly Features: Double-layer activated carbon filter cloth High filtration efficiency High dust holding capacity Good temperature Resistance Economical, practical and easy to install   There is an additional mesh filter to catch larger debris like leaves  Airflow Sound level

A bit or research and it seems a plenum on the outlet of the heat exchanger seemed worth a try. 60 Litre Plenum on the vent side. Seems to make the vents more balanced measuring the flow I can regulate the rate more evenly with one vent having less effect on the others, I'm going to add a presure sensor to the chamber see if there is any pressure in it I noticed coupling between room vents. e.g. I set one room and move to the next then recheck the first vent and its flow rate was changed. I was never happy with all those Y junctions, a very poor manifold design I suspect. As an added bonus its made the vent even quieter too. It works well within a range I can set the vent flows independently of one another, also the living room and office flows are much improved which have the longest ducts. The flow at the office and living room are 50% higher if needed now which is great for working at home. The office got warm and sticky in the past, not anymore. More Photos Sound test My refere

  My code is wrong in the driver for wind speed or the sensor is not good enough at such low speeds.   Measured with an anemometer Exhaust velocity  6.864  m/Sec mean  Mass Flow  0.121296892 m/Sec3  That's  7.2778  m/Min3  Therefore it is extracting 165m3 in 23 minutes That what I originally wanted 8 m/Min3 woo hoo

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  Measured Mass Flow in Exhaust Port of ERV  4.4 mS through 15cm duct = 0.0777 m/sec3  so 165m3 is removed in 35 Minutes DAS Reports 0.102 mean with the pitot tube in the exhaust duct