Great topic to raise, @djh… air-to-air systems are definitely under-discussed relative to their air-to-water cousins, so hopefully this thread can become a useful resource. The main players worth looking at in the UK market are: Mitsubishi Electric, Daikin, LG, Samsung and Panasonic. On the inst...

djh

3 hours ago

djh

Created the topic Air-to-air heat pumps - best models and installers in Air Source Heat Pumps (ASHPs)

For those of us who have already decided that we want an air-air unit rather than the air-water units that are much more common in this country, I'd like to see somewhere to discuss the choices available. What are the best models, and particularly which are the best installers for this type of heat ...

1066

6 hours ago

1066

Reacted to a post in the topic Anyone concerned about GivEnergy?

Majordennisbloodnok

7 hours ago

Majordennisbloodnok

Replied to the topic A2A vs A2W: Which Heat Pump Would You Pick?

There isn’t as far as I know, @djh, but you’re welcome to start one. That said, I suspect it’ll be like A2W; brand differences likely inconsequential compared with the effect of a good installer and good system design. However, you’re right that there is a distinct lack of publicity of good instal...

djh

7 hours ago

djh

Replied to the topic A2A vs A2W: Which Heat Pump Would You Pick?

Is there a section or even one discussion here that compares air-to-air brands and models and installers? For those of us who have decided we want one, just like everybody who has an air-to-water heat pump.

djh

7 hours ago

djh

Reacted to a post in the topic A2A vs A2W: Which Heat Pump Would You Pick?

Unsure

8 hours ago

Unsure

Replied to the topic Can anyone explain the following behaviour with a Grant Aerona 3 R30 / Smart Controller?

Final Update. Yesterday, I was going through the motions of looking at how each menu impacts the Set Back flow temp. I considered the combination of WC, Set Back, Decreased Water Temp - a parameter in the Circuit 1 installer menu ( although termed Decreased Fixed Water Temperature in the controlle...

bobflux

8 hours ago

bobflux

Replied to the topic How much can an east/west solar solar system be oversized?

Best performance occurs with PV string near inverter nominal input voltage (360V). So panels should be selected to not exceed max inverter MPPT short circuit current (20A), and number of panels in series so the MPP voltage matches inverter nomina input voltage. For example Vertex S+ TrinaSolar 500...

Mars

9 hours ago

Mars

Replied to the topic How much can an east/west solar solar system be oversized?

Unless you hire the cowboys our neighbours used, who installed the entire array off ladders, clinging on for dear life at the ridge of the roof for a couple of days! 🤣

Mars

9 hours ago

Mars

Reacted to a post in the topic How much can an east/west solar solar system be oversized?

Synthbuilder

9 hours ago

Synthbuilder

Reacted to a post in the topic Warranty Repairs- An Un Eddi fying experience!

colinc

10 hours ago

colinc

Replied to the topic How much can an east/west solar solar system be oversized?

There's no definitive calculation you can make. Knowing your Inverter Size & Type, along with your typical/ average house load metrics, and DNO export limit, will help in your decision. You have not mentioned shading. "Gary does solar" Channel has a good Utility to help figure out the 'numb...

Mars

11 hours ago

Mars

Reacted to a post in the topic Forum updates, announcements & issues

Mars

11 hours ago

Mars

Reacted to a post in the topic Forum updates, announcements & issues