Solution to extending CH to conservatory

[JonasX]

where the heating system of the dwelling is not extended into the conservatory or porch

Extending the heating system of the house, treating the conservatory like one of the rooms in the house.

So you have a house which is heated by storage heaters in every room. You build a conservatory and install a storage heater in it.

Have you "extended the heating system", or is each storage rad an individual heating system?

If each storage rad has its own on-off/temp controls they are independent systems. If they share control, like temp and on-off, then no. It is not difficult to understand.

Understand that the conservatory needs a system with fully independent on-off and temp control to the main house or any other systems in the dwelling.

A zoned system with independent on-off and temp control gives that.

It is clear what they are about. They do not want heating in the conservatory coming on when the main house heating comes on - or vise-versa.

The regs did not state that the "heating system" needs an independent heat source or heat transfer fluid - its stated three points:

1. Independent
2. Independent on-off control
3. Independent temperature control

You are assuming the regs mention things it does not, like independent heat source.

 

[^woody^]

There seems to be a lot of confusion about this but is is perfectly simple

L1b 3.15

"The exemption applies only ...... where the heating system of the dwelling is not extended into the conservatory"

This is defined as teeing off the existing pipework so that the rad in the conservatory responds at the same time as the rest of the system. ie adding an extra radiator to the circuit

So the implication is that an "independent system" is required where the conservatory rad can call for heat independently of the main house system - ie is on its own heating circuit or zone and its calling for heat does not bring on the rest of the main house heating (to save energy) and that is the whole concept in the drafting of the revised document

So as long as the rad is on it's own circuit with no other room emitters, it can be connected to the existing boiler

But if this can't be achieved, then the conservatory only has to conform with the energy efficiency requirements of Part L, and not the whole building regs

So if the heating needs to be extended then reference is made to

L1b 4.8

Where the extension is a conservatory or porch that is not exempt from the energy efficiency requirements (see paragraphs 3.15 and 3.16 above), then reasonable provision would be to provide:

a. Effective thermal separation between the heated area in the existing dwelling
(ie keep the external grade doors)

b. Independent temperature and on/off controls to any heating system installed within the extension.
(ie as it used to be - fit a valve or TRV)

So it really is simple ... fit the conservatory rad on its own circuit, or extend the existing house heating and fit some sort of control in the conservatory ... just like it was before

 

[Norcon]

just like it was before

So Jonas is correct.

 

[^woody^]

Aiy .. hail Jonas

 

[JonasX]

just like it was before

So Jonas is correct.

100% correct.

They do not want the likes of uncontrolled skirting heating in the conservatory teed off the main system. A TRV is an on-off control and temp control in one. A rad with no TVR is outside - on-off but no temp control. A Myson fan convector has the same qualities.

 

[JonasX]

Aiy .. hail Jonas

It took a lot of effort to get something so simple across.

 

[Norcon]

Chin up JonasX.
Who knows maybe you'll have a similar break through with the unvented v thermal store debate soon.

 

[JonasX]

Chin up JonasX.
Who knows maybe you'll have a similar break through with the unvented v thermal store debate soon.

Those who do not have it, never will.

 

[DeltaT2]

Chin up Anus.
Who knows maybe you'll have a similar break through with the unvented v thermal store debate soon.

He's well humped on that debate, the only one that's agreeing with him is himself. That photo of the cowboy is his male partner - he's been rogered more times than a Police radio!!!

 

[JonasX]

This Cowboy glue sniffer is babbling again.

 

[Tim_R]

Hi,

I'm looking to replace two old 1980s rads in my conservatory and was looking at the Myson fan convectors.

A TRV is an on-off control and temp control in one. A rad with no TVR is outside - on-off but no temp control. A Myson fan convector has the same qualities.

I'm not sure I understand the wording of your quote above. When you say the Myson fan convectors have the "same qualities" do you mean as a TRV or as a rad with no TRV?

I thought the hi-line rc models had their own temp on/off controls, so would work like a TRV?

thanks

 

[slup]

They behave the same way as a radiator without a TRV - they are either off or on. They have a thermostat inside which switches the fan on when the water is at a certain temperature, but they don't do any ambient monitoring.

Best way to use them would be on a separate zone controlled by a thermostat.

 

[Tim_R]

Thanks