From your comment Adam. I started to think of an idea. Some timer that activates a relay if a heat pump is cycling. Then sends an SMS message to the installer / manufacturer there is an issue. Like it and love it. Rich

The way my system is connected a the moment is a bit of everything. 8 radiators are connected with the Honeywell wireless trvs and 3 radiators with normal trvs just run when the heating runs. There are 3 towel radiators will run with hot water or heating and underfloor heating zone in the conservatory. Two of the 3 trv rads are in the center of the house surrounded by rooms. I originally re-piped it as an upstairs/downstairs zone after a large extension but after the Honeywell rep gave me a box of 4 wireless trvs i thought id give it a try.

What I'm missing out really is how you balance down radiators to get the desired temp when the HP is working away...I don't know enough really to deal with my own builders, so we will end up with a zone for upstairs, zone for downstairs and for a single story extension a zone for the living space (21) and a zone for the bedrooms (18).

Great video this is the type of video that should be going out.

Interesting, thanks... As someone who currently has a combi and a house with two parts (1980 and 2002), they have very different heating needs. I've gone for Tado TRVs, which has been great, but I know it's "microzoning" and, together with my 46° flow temp, will result in more boiler cycling since its lowest output is 5kw... BUT it's hard to give up the benefit of significantly lower gas bills due to better directed heat just to avoid extra wear on the system. I guess the dream is for heat pumps to reach Viessmann boiler levels of modulation so they are less affected cycling in that "heat only the home office" example you gave... But in the meantime would a thermal store be a benefit to reduce cycling where only small areas need heat?

Ok. Does this mean in all other scenarios mentioned here, it is not necessary to have a thermostats controlling zones and will be much more efficient to just have a single thermostat sitting in the middle of the house?

I've discovered this content trying to sort out my brand new system (boiler not heat pump). No thought about radiator size, no balancing, no zones, multiple drop legs, always seems to always have air in it no matter what I do, boiler commissioned at max output, flow temp set to 80c, pump speed left at max, some rads not getting hot. Wish I had someone who had been on your course install it.

I can run my heat pump in cooling mode and want to fit an extra zone so that I can use the same heat pump to run a couple of wall mounted water cooling cassette with condensate on a separate zone. What’s the best way of doing this please?

when you are designing the system on one zone, is it important the underfloor pipes to be separated by rooms, or single circle can be shared with multipke rooms. E.g my toiled has a little sqare metres, can I combine its pipes with the bedroom?

Why complicating and creating some zones when it's easy to add a thermostat in each room and you control it like that and have zones or am I not thinking correctly?

Can you use say a taco system with smart valves to effectively zone down bedrooms and keep up offices on the same floor?

Does this apply to gas boilers too? Our greenstar CDI will be powering both the new extension underfloor heating and the old part of the house rads. Plumber wants to put multiple zone valves in..

Zoning upstairs and dowstairs in an average house using boilers, does work and saves a lot of energy.

Personally in my townhouse I prefer it cooler downstairs as that's the kitchen. Zoning is great and I am not giving up zoning. Not that it matters anyway a heat pump wouldn't fit in my house it would need a 30 metre run to get to the hot water tank. I am betting that's gonna hurt the flow and COP with heat loss

Don’t forget about the porch and any extension such as a conservatory, they by law have to be in sep zones in case of leaks

2:00 Why would you not zone upstairs and downstairs unless you intend to keep the downstairs heating on all night?

Install a 30kw boiler and 80C flow temp. What are zones?

What would you suggest in the home office scenario of just requiring one room heated during the day if not using central heating whether that be boiler or ASHP? Infrared panels?

Hey Heat Geeks. New follower to the channel. Loving the content - you make these topic very accessible and I've shared with 4 mates already. I have a question. If you were draw the following on your white board, how would you approach the zoning/rooming/control question:- > 2016 build, 4 story town house, attached on both sides; B-grade energy raging, ASHP, UFH (basement, ground) & jaga DBE* rads (1 & loft) < Basement & G are naturally cooler in summer; 1 & loft far too hot. In the Winter, 1 is very cold & the loft is freezing! Also, an uncommon use because we AirBnB some of the rooms: Basement (UFH) - master bedroom, dressing room & shower [8pm-7am use consistent] G (UFH) - kitchen/diner w/ north-facing french doors, WC [7am - 10pm use most days] 1 - Guest room, office, bathroom [office 9-7 mon/fri & other rooms typically constant] Loft - Guest room & ensuite [typically constant] My partner and I run hot so can't blast the master-bedroom during sleep time and also the smart rads don't seem to work as well as the UFH so want to think about how those rooms have the potential to run a little hotter without relying on a 24/7 furnace from the lower floors rising up! *considering upgrading to DBH for cooling as shifting to a pump that facilitates and that might help the loft in the Summer - d'ya reckon? Thanks in advance :)

If you have a heat pump you willcold anyway as it won't be working or you won't have the money to use it

Ah, but you’re just focusing on HPs Skaterboy, you don’t want to zone because HPs need High Flow Rates. Here on New Builds, we zone, FF & GF, both controlled by time/temperature. Increasingly, with the Kung Floooo etc, more people are working from home - use a Bedroom as a Study. So it’s very important that the property is Zoned. Why not come right out & say; for HPs you need limited controls & a High Flow Rate. As for TRVs, they’re shite at controlling room temperatures.

All well and good until the customer puts their hand on the radiator and freaks out that it isn't burning them

Sorry I don't buy your advice for most UK houses with poor insulation. Even with a modern build you comments on a single office not being zones is absurd. I do the same and simply place the thermostat in the office. Once the office gets to temperature why would it 'cycle cycle cycle'? Also flow temp will drop once the room is being topped up. An alternative heat source would be an electric heater at 30p per KWhr. Also....take an example in the morning when houses are coldest. Why wouldn't you zone off a lounge that won't be used as people prep for work etc? The room will gain heat over day via solar gain. You're literally advising people to throw money away. .