Finally took the plunge with the ME A48, FCU 10, 13, 18 and made the choice to go with Gain City through Mr David Tay, H/p 90013124 largely because he was prompt, knowledgeable and kept up with the computations that I was considering for my apartment.
Pricing was reasonable and we went with gauge 22 copper pipes, 3/4in armaflex insulation and 16mm drainage pipes. As the engagement was for concealed installation, there is not much point giving the price. I would say that getting the cheapest quotation at the expense of having to consistently chase the salesperson for quotations is not the way to go. How much confidence can one get from such a person/company. Imagine having to chase for an installation date!?
Thier team is doing the installation now and they were punctual with the appointed time and took initiative to look through how best to do the installation as well as show me that they are installing what was promised i.e the copper pipes, the thickness of the insulation, etc. Rather than just getting the sale and leaving it to his team of installers, Mr David Tay came in to check on the progress and advised his installers accordingly. This is particularly important for me as I have had problems with the drainage due to the the gradient of the drainage pipes.
In view of the above, I am happy to recommend his services.