Sorry, its MAXCOIL not Maxicoil. Bought ours at Furniture Mall in Beach Road. We're very happy with the mattress. Gives us a good night rest. You hardly feel when your partner toss and turns.
according to the sales agent we talked to, installing rainshower using gas heater should be no problem. but if you're using instant heater, it might not be enough.
we drop by our place after work everyday to see what has been accomplished for the day. if there's any we're not happy about, we call our contractor and he'll arrange for corrective actions.