Adrian Walker

You can cool the house down using UFH and ASHP. A2A will only cool the air, not the slab. If you get your calculations right and make sure it doesn’t overheat, the amount of cooling you gonna require in a typical year will be minimal.

A better way to cool your home if you have UFH is to cool the slab by a couple of degrees.

Sheep make a perfect Sunday roast.

Crazy idea. And the stove is a no-no

It is operationally profitable. It's interesting that it has to launch over 2,000+ satellites every year.

That's unlikely as the signal is very weak and the cost to run satellites is very high.

How old is the slab. What self levelling concrete did you use?

An insulated concrete slab is better if you need a radon membrane, as beam & block can create voids where the gas will accumulate. Radon gas is a silent killer.

The reason that some people put heaters in bathrooms is that after a shower, you are wet & naked and Evaporative Cooling takes place. If this is a problem, it's better to use infrared heaters/panels. You certainly don't need any UFH, either wet and electric upstairs in a Passive House.

What’s your budget for a project manager?

Best solution is an insulated concrete slab IMHO

If you want a healthy & happy home you should have MVHR. It doesn’t take a lot of room, you can self install and will save on your heating bills.

You should aim to get a better air leakage of 3.

Lewis decking is a good idea, but it won't need UFH. I wouldn't use air to heat the house, it's a poor way to put heat into the slab. You want a uniform and constant temperature that only UFH can provide. I have visited a certified passive house that didn't have UFH, it's was a disaster.

You should be looking and considering an insulated concrete slab with UFH. UFH pipes can be used to both distribute heat and cool.