If you wish to get your BH full with birds you need to make sure that your BH temperature, humidity and darkness within the right range.
The temperature must not exceed 31*C or drop below 22*C.
The room darkness must be about 2 candela light measurement. I normally used my own technique that is if you stand 2 feet apart you will not be able to see each other.
At the best humidity required will be between 85-95%RH.
The above three is a must have.
Those swiftlet will run away if you ignore these requirements.
If you are new and wanted to erect your own BH using bricks, I would like to remind you to use double layer walls system.
Try to avoid using a single layer brick system unless you have a special method to shield the hot sun.
Last few weeks I have visited a number of BHs and one of their biggest mistake was the heat problem.
There were two BHs with similar problem and both were using a single layered wall system.
One with zinc roof while the other was without.
The one with zinc roof was about 31*C during normal weather but will hit 33 during a hot sunny day.
The one with no roof experienced nesting nest temperature of 33*C during normal weather but will shot up to 35*C during a hot day.
This was mainly contributed by the very hot roof and the walls.
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I told both owners to heat shield their BH walls while the one with not roof above the cement slab I have no choice but to shut down the top most floor.
As for the room humidity I suggest the use of wet floor system added with humidifiers.
The wet floor shall be placed inside the VIP room and the main hall.
The humidifiers shall be a kind of back up just in case the humidity falls below the minimum range.
One interesting method to top up those wet floor pool observed inside a BH in Kinarut Sabah was the use of water storage tank on every floor.
The owner wanted to top up those wet floor system as fast as he can so that he will not be staying around inside his BH for too long, he got this idea of putting a reasonable sized water tank on each floor.
What he did was to open the tank cover and scoop fresh water using those pails and pour them into all the pools on each floor.
The time taken to flood all his water pools was faster and easier.
He take less than 15 minutes to flood all, about four water pools.
A brilliant idea and I recommend this technique so that you will not be inside your BH for too long.
Most people will use those water hose to fill up those pools and it will take at least 15-20 minutes per pool.
Have a look at the above sketch for reference.
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