12 May, 2009

A Two Storey House to Ventilate

Posted by: admin In: Ventilation and heat transfer

It is two story with exposed beams in both the lounge and the master bedroom,

Downstairs we have the lounge, kitchen, dining room, bathroom and two very cold and damp bedrooms. Upstairs is the master bedroom, ensuite and an office, these cover less than half of the downstairs floor area.

In the lounge is a large wood fire which heats up the lounge quite easily, some of this heat goes up the open stairwell to the upstairs rooms and helps keep these rooms  warm, but as they still get condensation the windows are left open to ‘ventilate’ these rooms.

 The home owners want to move heat from the lounge to the two cold damp bedrooms.

Now a couple of things to note:


When a house is heated with a wood fire (or any type of heater) the warm air in the room will be able to hold more moisture and as this occurs the warm air draws moisture out of the fabrics, carpets and furniture in the room, now this is how the room will feel both warmer and dryer, it is also the reason we get condensation, as all we are doing is pulling the moisture out of the room then as the room cools it falls out of the air on to our chairs carpets and condenses on our windows. This heated moist air takes up more space and is effectively expanded into the room next door and down the passage if it can as there really is not much airflow as such through a house unless we force it.

If the wood fire is continuously stoked 24 hours a day it may over time dry out our home, but as soon as the wood fire goes out the moisture will immediately be absorbed back into all surfaces and fabrics, all waiting to be heated next time the wood fire is lit allowing the cycle to begin again with the bedrooms becoming colder and damper as the moisture stays there even when you open the windows.


When you transfer heat from 1 room to another through a heat transfer system into bedrooms you are actually pushing moisture laden hot air into a room that is already cold with damp carpets and a damp bed ( many people tell me that the bed is not damp – yet once the ventilation system is installed they tell my how they love their dry bed).

If there is any mould in the bedroom you will at this point be feeding the mould with warm moisture – ideal for growing more mould. The room will initially feel warmer, yet over time will become harder to heat, feel colder, damper, get more condensation and grow mould, and the cycle will continue over and over.


Keep your home dry on a continuing ongoing basis (the reason for this is that any family continues to make moisture at all times of every day), by using mother nature to vent filtered fresh dry air from your roof cavity into all bedrooms and lounge this will kill off all mould spores, warm up and dry out your beds, dry out your carpet and stop condensation, doing this, will make your whole home much healthier and easier to heat. 

This is done by installing a well designed home ventilation system in your home, in this case one with a heat transfer as part of the design and configuration to heat the cold rooms with the excess heat from the lounge wood fire. In doing this the home will have dry natural fresh air pumped into the entire home on an ongoing basis (at variable speeds automatically to suit the conditions) and when the wood fire heats the lounge the excess warm air is taken into the bedrooms to keep them comfortable. Then when the wood fire goes out the system will continue to circulate dry air to remove moisture and stop condensation.

Drying out a home is a year round continuous process, make your home fresh and cooler in the summer and warmer drier more efficient and cheaper to heat by installing a well designed and adaptable home ventilation system.

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