[Eddie Conroy]

Yes,
I have done the courses and note that the NCCA manual mentions that increasing the temperature increases the chemical activity ( which may be good or bad) But when I was the exhibition in spring I overheard an American exhibitor having a right old ding dong with an 'old hand' on the subject.
 Reading some of E M Brown's books, I notice that he mentions that some of his colleagues question the the need for using  temperature and  I know that an awful lot of machines in the market are not even fitted with heaters (Admittedly they can be filled with hot water)
What are your views, My natural instinct tells me that heat is useful but there are people out there with informed and differing views
Regards
Eddie

[Pristine_Cleaning]

Yes it does

[cleaning co]

o yes,try cleaning a minging should be red but now is black pub  carpet  with cold or warm water   then try very hot or steam  u do the job in half the time with lot better results.
gary

[BRSL]

I could be wrong but doest the ncca say that water over 14 degrees becomes a catalyst so yes increasing the reactivity in the chemical therfore highering the suffactant levels therfore getting a better clean.

And yes would have too be the answer, and yes have you ever tried to clean a mingin pub covered with bar tar with cold water it doesnt happen, I even find more than not using a hydraforce sprayer i get better results clearing the cold water from my solution lines before i start, always clean and prespay with hot water is the short of it.

[Karl Wildey]

Once you have cleaned with very hot water, you can answer the question yourself. Its loads easier and once you have tried it, its very annoying when you steam/heater mate breaks down.

[Doug Holloway]

Hi Guys,

Go back to your washing machine ,generally speaking the dirtier the clothes the hotter the wash .

The addition of enzymes has allowed cooler washes but there is substantial evidence that enzymes can cause asthma sensitisation.So a hot clean without using harsh chemicals is probably better.

Cheers,

Doug

[Graeme@Access]

Hi,

The concept you are refering to is a thermodynamic principle whereby an increase in temperature increases the reaction rate.  It is bourne out of the first law of thermodynamics (Gibbs Law) and mathematical derivation leads you to a simple situation.

An increase in reaction temperature of 10°C DOUBLES the reaction rate.

I think the NCCA were trying to say the same thing in thier manual, but used 14°F instead.  Anyways, temperature makes the chemistry of cleaning occur faster generally.  Eg try dissolving sugar in hot water vs cold water.

However, some surfactants are made to operate at around room temperature and  increasing the temp further has a deliterious effect on the solutions wetting properties.  ie they work worse the higher the temperature you use them at.  Enzymes are also examples of reagents that operate within a strict temperature range.

In addition to this, and refering to Eric Browns book [2nd ed P45], it has been shown that a high solution temperature in the tank can be used as the carpet cools to room temperature within one second of the wand passing over it.

In summary, higher temperatures could make cleaning a carpet easier and are unlikely to cause dammage.  Thats what i think from both what i have read and heard from others.

Hope this helps

Graeme
Access Cleaning Solutions

[david_green]

Hi all

What about the danger of setting stains. Blood being the obvious example but are there other substances which may be permanently set by excessive temperature?

[Doug Holloway]

Graeme,

Top answer.

The increase in reaction rates is why it is so dangerous for humans to have a 'temperture' and why anything over 104 F  is fatal.

A typical cleaning powder will contain different enzymes which work in different temp ranges.

Some cleaning solutions will recommend lowish temps e.g Ultimate Master from Alltec.

Cheers

Doug

[BRSL]

thanks AccessCS thats what i mean to say 

[homenclean]

I clean a lot of pub carpets around the north of england and you would be ammazed at the number of landlords who cant beleive how clean we get the carpets compared to the guy who`d done them previously.
Always use a good quality pre spray
Aggitate it into the heavily solied areas
Leave for a few moments
Spray Again
Then clean with a good quailty extraction powder at temperature.

We have saved carpets that were due to be trown away.

The temperature makes  a huge differance but so does the quality of product you are using.

Always be warey of cleaning at high temperatures there are risks involved, check seems and joins etc.

John