Check this out if you're living in a city -
https://airth.in/products/fresh-air-unit.
Cross ventilation depends on which direction the wind blows, how many obstacles you have in front of your house, and how your windows and doors are placed.
I've got a VRF system (HVAC) installed in my house, and it works well, but running it works out to be a little expensive because the outdoor unit consumes about a 100 units a month (if we don't use air-conditioning) just to keep the oil ,which it needs for cooling, warm. Also, since most of the indoor units are far away from the outdoor unit, it will not be as efficient as a regular split A/c, IMO.
Right now, I need to fix the insulation for the A/c pipes because we had a rat problem, and they chewed through the foam in some areas. But, since most of the pipe is inside a POP false ceiling, it's not possible to put new foam everywhere.
We only use the A/c for 1 or 2 rooms at a time, which is why it isn't efficient for us. But if you're using it in all the rooms then I'm sure the equation will change.
Regarding service, since a lot of other flats in my housing society have the same unit, it's not a problem, and as long as you stay in touch with your installer, it shouldn't be a problem for you either.
The biggest benefit of the VRF system is that you don't spoil the exterior facade of your house by having multiple split A/c units outside.
It also does heating, and supposedly, if you're cooling one room, and heating another it's super efficient. But we've never run it in heating mode.
Looking for a next level heating and cooling system to keep your business comfortable? Look no further than Variable Refrigerant Flow (VRF) systems.
www.samsunghvac.com
