First I would reframe the question. The CERV2 device, while it is an essential component, is only part of an overall design contributing to our indoor environmental quality. So my observations applies to the system performance.
Pro
- uniform comfort throughout the home - awesome
- quiet
- clean - MERV13 filters slash housekeeping chores
- peace of mind to know that 'invisible' health factors such as PM2.5 particulates, VOCs, CO2 and humidity are being monitored and managed
- works great out of the box with virtually no intervention needed yet allows tweaking for seasonality and home operation.
- service and software upgrades are simple. We had a software and chip issue on the CERV that were promptly and easily addressed.
- incredibly efficient - in combination with the earth tube the CERV heat pump COP is optimized.
- the folks at Buildequinox are responsive knowledgeable and thorough.
- rich data acquisition and online reporting and control is outstanding.
- the CRV design is robust, simple, serviceable, efficient with quality components.
Con (pretty much nitpicking here)
- CERV2 hasn't addressed a full Centigrade interface - its a Canadian thing.
- the fasteners on filter covers don't convey the underlying quality of the CERV
- the ducting design has to be done right the first time and the flow rates are bit out of 'normal' for HVAC installers. We are slightly warmer upstairs than down and can't quite balance it out.
- the inline resistance heater is a bit mysterious to setup and monitor although ultimately is just works.
- duct noise levels at night are more noticeable - comparable to a regular furnace install - but purely subjective as it is mostly me that thinks there should have been more duct muffling.
- there are a few 'tricks' to learn such as dehumidification by lowered max temperature.
- there are few data points that aren't collected in the data acquisition such as outdoor temp in addition to intake temp.
- manual inspection of filters needed - pressure differential alarm would be sweet.
Further thoughts...
Part of the IEQ equation is the Heat pump water heater and heat pump clothes dryer. These both contribute some heating/cooling and dehumidification. Our indoor plants contribute some humidification. One of the fascinating aspects of PH is how responsive the indoor environment is to small input changes.
In our experience, we have found Buildequinox are uniquely committed to leading-edge development of residential IAQ management and high-performance home design in general. They offer a constantly updated archive of related article and videos that are required reading if you really want to appreciate the complexity of optimal IEQ design. https://www.buildequinox.com/news/ and https://www.buildequinox.com/publications/
In our experience, we have found Buildequinox are uniquely committed to leading-edge development of residential IAQ management and high-performance home design in general. They offer a constantly updated archive of related article and videos that are required reading if you really want to appreciate the complexity of optimal IEQ design. https://www.buildequinox.com/news/ and https://www.buildequinox.com/publications/
Another thoughtful, leading-edge source of information on the topic is Nate Adams. Nate draws knowledge from many of the leading thinkers and practitioners in the field and applies it in a practical accessible methodology. Download his 'Understanding your home heating and cooling system' for some revealing tips and recomendations. http://www.natethehousewhisperer.com/hvac-101.html
