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Warm air Heating

Also see www.gaswarmair.co.uk   &    gaswarmair@ntlworld 

Warm air heating is with a difference, the difference being these units do not contain any water (dry system).

  The air is warmed directly by the gas as it passes through a simple heat exchanger, the air is then circulated through ducts within the property. These systems are extremely economical to run and quick to warm up from cold, but if you are wanting this type of system then you would be best moving into a house that already has it. Or building your own house, fitting the warm air ducts as the house is being built. This type of system is almost impossible to fit into existing houses because of the large ducts needed to circulate the air.

These really should be installed in the centre of the property with the ducts starting off very large and gradually reducing. Air vents are also needed in the walls from heated rooms to allow cooler air to return back to the warm air unit for re-heating. (return air) This is filtered, re-heated and then blown back through the ducts by large fan. Its also possible to get electrostatic air filters to eliminate odours and 95% of airborne particles. (good for asthma sufferers)

The circulation fan may be used to circulate air in the summer to promote cooling. But should not be confused with Air Conditioning  as air Conditioning is something totally different

Mechanical Heat Recovery & Ventilation (MHRV) units may be incorporated into a ducted warm air system. Utilising the warm-air ductwork, kitchen extract fans and tumble dryers may also be piped into the warm air/MHRV system.

As far as I know, Johnson & Starley www.johnsonandstarleyltd.co.uk , the only large British warm air manufacturer, they can give you a list of installers for replacements and full systems. Telephone: 01604 762881 or try the American companies who have outlets in the UK. Lennox at http://www.lennoxuk.com and Trane at http://www.trane.com

Warm air  heating was popular in the sixties and seventies, when a number of houses were built with it in, but the only new ones are replacement units in existing properties. Most people will fit a wet central heating system if these units need replacing.

Advantages

Economical

Quick to heat the property

Fan can be used for cooling in summer

Disadvantages

Can't add to later

Odours can be transported between rooms  

 

Typical wiring arrangements

 

 

 

 

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