The costs incurred through extended time on site can be dramatic but this seems to be the norm for all projects, ignoring the amount of money that is just thrown at the problem.

Despite having sold deairation products into the marketplace for many yeas, I am still surprised that a technical solution is not highly valued considering the problems its solves.

A deaerator is currently viewed as just a pipeline product and is just added into the specification without due consideration to design requirements for the full installation.

Occupancy of a building can affect the selection of correct deaeration products so it is important to discuss this at the design stage.

The buyer or engineer obtains quotes and will make the final decision. (The cheapest one generally wins even though everyone knows that the cheapest is not always the best.)
Currently deaeration has no benchmark, so anything goes. Deaeration is only approximately 0.2 per cent of the total mechanical contract, but when placing orders the prerequisite is how much can be saved on 0.2 per cent of the contract value. The additional cost, which is generally very small, in actual fact pays for all R&D.

After installation, the contractor struggles to commission, which can result in a delay of a week - a few mens' work. Plus there are sub-contract commissioning engineers; plus site establishment costs, resulting in late payment of final account and retention monies. The total cost of a week can be at least £10,000/£15,000 on a moderate contract.

Correct deaeration and dirt separation may have cost £5,000 or even less but acts as an insurance policy against future delays.

By coupling pressurisation to deaeration and dirt separation, virtually all qualitycontrol aspects of the system water are covered.

Pressurisation should be viewed simply. The expansion vessels should be slightly oversized so the pump is then only used infrequently or in an emergency, because of a leak for example. All expansion water is contained within the correctly sized vessels to provide a trouble-free life. Spirotech can provide rapid deaeration without further manual venting after the first vent.

After allowing the deaerator a few days to work its magic, contractors can commission without delay.

There is also no need for pump suction strainers; no call backs during the defects liability period; no blocked heat exchangers (extending heat exchanger life); an extended life of pump seals (no magnetite wear or cavitation effect); full output of all heat emitters and absorbers in the system making operation and fuel usage significantly more efficient.