It is not very wise to pay too much for a product however it is even worse to pay not enough.

When you pay too much you may lose a little – that’s about it.  When you don’t pay enough you sometimes lose out a lot, or even everything.

As the product you brought was incapable of doing the thing it was brought to do.  The law for the balance of business forbids paying a little and getting a lot – it just can’t be done.

If you consider a deal with the lowest bidder it would be best to add something for the risk you run and if you do that you will have enough to pay for something much better.

It’s much the same when it comes to purchasing roof ventilators YOU CAN PURCHASE AN EFFECTIVE ROOF VENTILATION SYSTEM OR A SUPERMARKET WHIRLYGIG or even a stand-alone static ventilator.

For effective roofspace ventilation it’s obvious an effective roof ventilation system will win outright.
John Ruskin – Kevin Baker