This article explains: some background to our bungalow design, why we had the original mechanical ventilation and heat recovery system installed; why we chose the latest system and our experience with both systems.
Mechanical ventilation and heat recovery System with integral heat pump
John Perry | Redoak
- The ducting was rigid galvanised steel tubing that was wider than the original flexible ducting. The effect of having rigid tubing was that greater air flow was possible with lower noise.
- All ducting was insulated with special foil wrapped bubble insulation, and it looked extremely tidy; this was better insulation than we had before.
- Two large silencers were installed by the unit to reduce noise; our system is inaudible when running.
- The unit weighed 100kg, and so I made a 2 metre long load spreading plinth to place it on.
- We had an optional electrostatic filter fitted to further filter and purify the air.
- I opted for a slightly larger unit than the bungalow design suggested I needed to maximise the heat pump heating (in winter) and cooling (in summer), and this proved to be a wise choice.
- Make sure you keep the installation manual that comes with the unit; it is useful.
- The number of options available is significant; I should probably have understood them better before placing my order; so read up on the manuals and make sure you have a good understanding of them before you talk to the Genvex people.
- You should not “spoil a battleship for a half penny of tar”. What I mean is, go for a few extras that you like and may be useful, and do not over-economise. The importers suggested I drop the electrostatic filter off my order to save cost, I am glad I did not!
- The chief benefit is the elimination of condensation and all the problems that go with it.
- The air is without question cleaner and fresher and there is no sense of mustiness, and no draughts.
- Ever since we had the new system installed, my asthma has improved and so has my son’s, so I am convinced there are some tangible medical benefits.
- There are amazing different options on controlling the system; fully reading and understanding the manual is important to get the best out of it.
- When the heat pump is operating in heating mode (in winter), you should be able to turn the heating off earlier than without the heat pump running.
- When the heat pump is operating in cooling mode, it is NOT air conditioning, but it does provide a useful cooling effect in hot weather that is noticeable. Air conditioning is expensive to run; this system is not expensive.
- The heat pump only consumes 350W in either heating or cooling modes, and the benefits far exceeds any running costs.
- There are different principles that can be applied to running the system, particularly in the winter. I’ll discuss these with people individually.
- I believe we are seeing a running cost saving through using this Genvex system, but I am unable to quantify it because the weather is not constant.
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