endlssorrow 1 Report post Posted December 2, 2010 (edited) Intend to install 4 aircon in my new house... living room + 3 rooms. any recommendations? i see many say go for Mitsubishi. any specific models to advice or i should look out for? Edited December 2, 2010 by endlssorrow Share this post Link to post Share on other sites
neubie 2 Report post Posted December 2, 2010 (edited) Intend to install 4 aircon in my new house... living room + 3 rooms. any recommendations? i see many say go for Mitsubishi. any specific models to advice or i should look out for? first, determine ur usage, ie, how are u going to use the rooms. eg, are u intending to cool all rooms at a time? if so, u need a very powderful outdoor compressor (which will be $$$$$) to simultaneously cool all. if u are using to cool all three bedrooms at the same time, and not using the living room, then may opt for a smaller BTU aircon. once u done that, measure the floor area of ur rooms to determine the BTU required. for most rooms, a 9000 BTU cooling capacity will be more than enuf, factoring in other heat-generating things like human traffic, computers, etc. the BTU online calculator tells ur requirements the only consideration is ur living room which will be (much) larger than ur bedrooms. some contractors will tell u a 9000 BTU still will be sufficient to cool the room (to maximise their profit margins), but the question being, how fast it will cool to your desired temperature? in most cases, under-dimensioning an aircon FCU will not lead to savings in power, as the poor FCU is underpowered & cannot deliver the cooling capacity, and most of the time running continuously, compared to a 15,000 BTU which will cut-out once temperature is reached. hence for a living room, a min of 12,000 or 15,000 BTU is required for it to work efficiently. so u add up all the individual BTUs, determine ur usage pattern, 9k (for MBR) + 9k (for common room 1) + 9k (for CR 2) + 12k (for living room) = 39,000 BTU 9k (for MBR) + 9k (for common room 1) + 9k (for CR 2) = 27,000 BTU (assume living room is off) 9k (for MBR) + 9k (for common room 1) + 12k (for LR) = 30,000 BTU (assume CR2 is off) . . . round up to the total BTU to the nearest BTU offered by the manufacturer. Edited December 2, 2010 by neubie Share this post Link to post Share on other sites
endlssorrow 1 Report post Posted December 2, 2010 waaaa.. so chim ah.. when living room aircon is on, i think normal rooms wont on ba... if so.. maybe living room + master room.. but every night master room will on... maybe + another 1 room on togther sometimes... Share this post Link to post Share on other sites
kimsim 8 Report post Posted December 2, 2010 waaaa.. so chim ah.. when living room aircon is on, i think normal rooms wont on ba... if so.. maybe living room + master room.. but every night master room will on... maybe + another 1 room on togther sometimes... Here showing the chart from Mitsubishi electric inverter system 4. When turn on all in same time operations. MXY-4A28VA 10x3=2.4kw 10x3+18=1.5kw x 3 + 2.7kw 10x3+24=1.39kw x 3 + 3.01kw Kw x 3412 = BTU. MXY-4A38VA 10x3=2.5kw 10x3+18=1.6kw x 3 + 3.2nd 10x3+24=1.48 x 3 + 3.56kw Kw x 3412 = BTU. If on all you will feel won't cold as fast to compared on for 2 - 3 rooms. So got money just go for higher capacity BTU. Can good enought support all same times. Share this post Link to post Share on other sites
endlssorrow 1 Report post Posted December 2, 2010 Here showing the chart from Mitsubishi electric inverter system 4. When turn on all in same time operations. MXY-4A28VA 10x3=2.4kw 10x3+18=1.5kw x 3 + 2.7kw 10x3+24=1.39kw x 3 + 3.01kw Kw x 3412 = BTU. MXY-4A38VA 10x3=2.5kw 10x3+18=1.6kw x 3 + 3.2nd 10x3+24=1.48 x 3 + 3.56kw Kw x 3412 = BTU. If on all you will feel won't cold as fast to compared on for 2 - 3 rooms. So got money just go for higher capacity BTU. Can good enought support all same times. how much will it be with a higher BTU as compare to lower BTU? Share this post Link to post Share on other sites
kimsim 8 Report post Posted December 2, 2010 (edited) how much will it be with a higher BTU as compare to lower BTU? Got 2 models I perfer the 38VA model to be better if turn on at same time. For normal require per room unit may need standard BTU 8530, Becuase already sharing so can't get the enought BTU to support and keep as faster cooling to maintain the same temperature. if you set to 23c you will feel it's getting slowly cooling at the same time. For experience to be use at same times it is less ppl are doing that. Day time your master bedroom or common room is on and living hall on just for 2 units usage. Night time living hall on and your kids maybe already sleeping, Just for 2 to 3 units on. For midnight only you can't sleep and watch tv will be turn on living hall for 4 units are runing it is won't effect anyone in sleeping due to suddenly become very hot and warm. Edited December 2, 2010 by kimsim Share this post Link to post Share on other sites
endlssorrow 1 Report post Posted December 2, 2010 Got 2 models I perfer the 38VA model to be better if turn on at same time. For normal require per room unit may need standard BTU 8530, Becuase already sharing so can't get the enought BTU to support and keep as faster cooling to maintain the same temperature. if you set to 23c you will feel it's getting slowly cooling at the same time. haha.. in terms of value ($$), will it different alot? normally i will switch on to 25 or 26c will do.. Share this post Link to post Share on other sites
kimsim 8 Report post Posted December 2, 2010 haha.. in terms of value ($$), will it different alot? normally i will switch on to 25 or 26c will do.. It's won't effect your room cooling. Sure set to 25c already feeling very cold. Btw no everyday on at 4 units just go for 28va it is enough for you. Share this post Link to post Share on other sites
neubie 2 Report post Posted December 2, 2010 waaaa.. so chim ah.. when living room aircon is on, i think normal rooms wont on ba... if so.. maybe living room + master room.. but every night master room will on... maybe + another 1 room on togther sometimes... assuming u have budget for a 30,000 BTU compressor. based on my example, you can achieve cooling with the following combinations: 12k (LR) + 9k (MBR) + 9k (CR1) = 30,000 -----> optimal cooling efficiency 9k (MBR) + 9k (CR1) + 9k (CR2) = 27,000 -----> optimal cooling efficiency 12k (LR) + 9k (MBR) + 9k (CR1) + 9k (CR2) = 39,000 -----> poor cooling efficiency as u exceeded the compressor capacity its really wasteful to dimension too big size compressor to cool all rooms, as how often do u do that? Share this post Link to post Share on other sites
endlssorrow 1 Report post Posted December 2, 2010 waaa... so many numbers to define physic? hahaha hmmm.. 1st: i wont on all 4 aircon at a go coz is stuipd & waste of electricity to me 2nd: mostly every night will on master room aircon. 3th: at most masterroom + 1 other room if parents r coming to stay overnight. (fri & sat) ? how about the costs for the system 4? Thanks... Share this post Link to post Share on other sites
neubie 2 Report post Posted December 2, 2010 waaa... so many numbers to define physic? hahaha hmmm.. 1st: i wont on all 4 aircon at a go coz is stuipd & waste of electricity to me 2nd: mostly every night will on master room aircon. 3th: at most masterroom + 1 other room if parents r coming to stay overnight. (fri & sat) ? how about the costs for the system 4? Thanks... then i tink u dun need anything higher than 30k btu. Share this post Link to post Share on other sites
chuays 0 Report post Posted December 2, 2010 Not sure you are interested Selling for a friend a Mitsubishi Electric 4-in-1 Inverter air con. Won in a lucky draw yesterday. MXY-4A28 (01 unit) MSY-GE10 (03 unit) MSY-GF26 (01 unit) Does not include installation. SMS 96193421 and quote your price. Intend to install 4 aircon in my new house... living room + 3 rooms. any recommendations? i see many say go for Mitsubishi. any specific models to advice or i should look out for? Share this post Link to post Share on other sites
endlssorrow 1 Report post Posted December 17, 2010 i just asked gaincity of Mitsubishi sys 4 costs about 3.8k... no free service... 2yrs or 3yrs package very exp... they say the bigger size pipe used, the cooler it is.. but problem is it looked so ugly right? i seen one of the smallest size type.. looks very nice.. but will it take much longer time to cool? Share this post Link to post Share on other sites
edenstrauss 3 Report post Posted December 17, 2010 (edited) But I thought that those pipes u r referring to are hidden in white trunkings right? And the rest would go into the toilet. Shouldn't be an issue. Edited December 17, 2010 by edenstrauss Share this post Link to post Share on other sites
endlssorrow 1 Report post Posted December 17, 2010 But I thought that those pipes u r referring to are hidden in white trunkings right? And the rest would go into the toilet. Shouldn't be an issue. Yup I mean the white color trunking pipe is bulky & ugly hanging on e top ceiling.. Share this post Link to post Share on other sites
