Advice on insulation, heating, ventilation

[JasonByrne]

I’m going to be renovating our small semi back to brick and want to insulate and move from oil heating to a heat pump and underfloor heating.
also interested in heat recovery ventilation systems, air quality is very important to me.
The oil boiler and tank need replacing soon, and due to a small garden i want the tank gone/to come off oil. Also for environmental reasons.
We’re willing to spend the time and money to make it work in this house.
Does anyone know of any advice services or forums for this? It feels like a total minefield and don’t want to **** my house up quite frankly.
I’ve already found out we can’t have cavity wall insulation due to driving rain/exposed aspect, but am still getting advice to do this.
Anyone got any advice or direction of where to ask?

[OliverShultz]

If you go back to brick you have to insulate to modern standards and need building regs sign off.

[DaneShayd]

I’ve found that the trick is keeping airflow steady without wasting the warmth you’ve already paid for. A good air recovery system makes that whole process feel pretty hands-off, since it balances heat and moisture on its own and reacts to stuff like humidity spikes after cooking or showering. I like that it cuts down on window cracking in winter while still keeping the air feeling fresh.