For 29 years we used thermostatically controlled storage heaters and since our bungalow is airtight and very well insulated, the running costs of storage heating was reasonable.

However, in 2018, we removed all the storage heaters and had a 7.5kW air-sourced heat pump fitted driving two ceiling cassettes and a wall unit. 

We used this system for the 2018-19 winter with two ceiling  cassettes in the main hall, but they were not quite sufficient to heat our bungalow.

So, in 2019, we had an additional 5kW air-sourced heat pump fitted to heat and cool the lounge and provide additional heating to the bedroom area.

We had tried a stand-alone portable air-conditioner, but it was incredibly noisy and needed a huge snakey hose.

Our ventilation system had served us well, but significant technological improvements had taken place in the past 20 years with new models having more efficient heat recovery and having optional air sourced heat pumps that can provide heating in winter and cooling in summer meant it was time for an upgrade.  Newer models also have better efficiency, air filtering, control facilities and monitoring.

After reviewing the market for suitable systems, we selected the Genvex GE Premium 1L unit that provides up to 150 cubic metres/hour of air, and which is controlled by the Optima 300 microprocessor controller.

On the left is a photo of one of the room outlets.

For further information on Benefits and Features:

The installation was carried out by Genvex's UK distributors Total Home Environment Limited (THE) and was completed in five days using three people for the first day to remove the old system and one person for four days; we had a particularly competent installation engineer.

THE returned  to commission the system and fine tune the inlet and exhaust air flows in each of the rooms for optimum operation. The pictures show the completed installation.  You may click on the photos to see a larger image. 

We are very pleased with the end result.

This page describes the Genvex Optima 300 Controller. 

Please remember that the ventilation system will work perfectly well in the state it is set up when the unit is commissioned by the installers, but there are features and facilities available that can make your life easier.

Besides, if you are like me, you will always want to know how something works, and get the very best from it.