As you can see, the intake is in the center, flanked by the exhaust. This configuration is loud and blows air down your back when seated at the bar - and in your face when seated on the couch. This configuration will be completely eliminated. A new quiet and comfortable configuration will be designed by DOMETIC allowing the cool air to float into the room without the concentrated blowing force or sound.
The unit on the right is a 30,000 BTU modulating unit that will run the three staterooms. The left unit is a 24,000 BTU that will cool the salon. These are the compressors and will be located in the engine room.
While this unit did not provide air for the bridge, its removal will make room for putting a unit that will. This Lunair unit is under the console and can be seen in the center of the salon. It is very large and will need to be cut into pieces for removal.
With the removal of the old valance and blinds, we can begin the troft design from which the conditioned air will flow. This troft is located on the port side and air will flow from the air handler to be located in the TV cabinet, through 6" duct and into the front of the troft. The troft will allow air to flow the full length of the salon through an opening approximately 1 1/2" from the head liner.
Small hole large peg! The starboard air handler needs to be positioned in this cabinet above the fridge. Although the cabinet opening is not large enough to fit the unit, the inside of the cabinet is large enough.
The answer is to cut a hole on the underside of this area, large enough for the unit to be put up through it and into place. The hole will then be closed. We have a slight concern that this plywood area will reverberate and cause noise.
With the TV removed, you can see the wire mess that was hidden behind it. The previous owners added new items and left old wires instead of taking the time to remove them. We will sort, remove and organize this cabinet so the portside air handler will fit.
This is the portside trough. You can see the slots cut in the top. We determined the amount of opening needed and then divided it into 1/2" X 6" slotted cutouts. The cutouts are distributed with the majority located at the entry point of the duct and progressivley fewer toward the end. This was done because the majority of the air's force is at the end.
We taped various sizes of paper to the trough to determine a size that would cover the slots and the majority of the window frame. This determination was based on the average person's hieght so if you are 6'6" you may see the slots. We tried to keep the size to a minimum so it would not be too massive.
This 12,000 BTU air handler is mounted over the fridge and will push cool air fore and aft through troughs hidden by the valance on the starboard side of the Salon. It was a pain getting it here, but it should pay off big. This, in conjunction with the same unit on the port side, will make the Salon very comfortable.
Part of the soundproofing involves installing this Cruiseair unit that will feed the port side valance and another unit that will feed the starboard side. Each unit is 12,000 BTU and are fed by the compressor located in the engine room. The previous configuration and Luneair unit were not quiet. Dometic and Cruiseair are a welcome replacement!
This small vent was the only source of air for this stateroom. The air flow was controlled by the V.I.P. Stateroom - so you are left to the mercy of whomever was in the V.I.P. Stateroom. Also a seldom thought about subject is air lock, and what happens when you do not have the right intake. This is the last vent in line from the V.I.P. room and already subject to restriction. When this little room fills with air, because the door is closed for privacy, then the air coming in needs more force. Making this room independant will solve all of the above. I would hate to find out the next day that my guests were sweating all night. DOMETIC to the rescue.
This air unit will be installed and give independent control to the guests. Previously the guests were at the mercy of the VIP Stateroom and only a very small 3" outlet was in the room. The additional problem with the previous configuration is that a room can get an air lock which prevents the little bit of cool air from entering.
The box in the background is for power connection and the box in the foreground is for the moudulating system. The three Staterooms are cooled by the 32,000 BTU compressor in the engineroom and the moudulating system allows each room independent control.
The 5" duct is split into two 4" ducts and ends in these outlets mounted in the ceiling. Once the headliner is in place, a board will be mounted approximately 2" below these outlets. This will disperse the air into the room rather than have it shoot down to the floor.
Two white-boards 7" X 12" were cut and edges were rounded. They were then placed over the air ducts placed 1 1/4" away from the ceiling. They deflect the air so that it comes into the room nicely. It also makes very little noise. We love it.
The main culprit of noise in this room is this compressor which is located in the top of the closet. This will be removed freeing up closet space and making the room quieter. The new compressor will be located in the engine room and only the air handler will be in the stateroom. That will be mounted under the bunk and have isolators for sound reduction. This location will allow venting into the valance area.
We had intended to mount the air handler under the berth but that endeavor was proving quite difficult. Since the new handler is much smaller and quieter we decided to mount it as far back in the original cabinet as possible. This will still allow enough room for a guest to store a duffle bag in the cabinet.
This photograph shows the port side cabinets. A 6" duct will run into the first cabinet and be split into a 4" duct that will dump into the port valance and a 3" (shown) that will dump into the starboad valance.
The air handler will be installed in this closet located in the VIP Stateroom. The 3" insulated duct is routed to the Guest Head. The 3/8" and 1/4" copper tube will be routed back to the Engine Room and to the compressor. The 3/8" tubing is insulated.
These 3x3 PVC fence posts will be mounted in the valance area of the VIP Stateroom and used as troughs for the flow of air. Marks were created for slots to be cut in the top side for the airholes. A larger hole (4" for port and 3" for starboard) has already been cut in the side for the flexable duct work. Slots farthest from the duct entry are cut smallest with increasingly larger slots cut closer, since most of the forced air will be at the end of the trough.
The starboard trough is mounted with a 3" flexible duct coming into the right side at the forward edge (left on photo). Smal air slots are on the aft (right side of photo) end of the trough. She is now ready for the valance to be mounted.
The air handler was mounted on a board coated with silent running and then fastened in place. Air duct and copper tubing are now all connected. The Dometic Cruisair SMX Series Control box is mounted on the upper left and the remaining electrical box is ready to be mounted.
Now that the valance has been completed we will work on the covered panels below the cabinets. They will be covered in the blue Ultra-leather used in the salon upholstery. This will tie the colors together and pull blues out of the up-coming "Mark Ray" comforter.
This hose is being pulled through the Master Stateroom head and into the VIP Stateroom and will replenish the room with fresh air. Stale air is not appealing to us. Air supplied by the Munter vents on the bridge will be pulled into a collector box with a fan and then pushed into the Master and VIP area via this hose. A fan to evacuate air will also be installed in both rooms. The Airpax E-Plex system will have timers set up to run these fans to replenish about 10% of the air in these rooms at appropriate intervals.
This was a horrible source of noise. When all air is concentrated through a small opening the result is a venturi sound. This can and will be eliminated by not having the air so constricted. The air will be allowed to drop into the room rather than be forced. Keep in mind that the same amount of air will flow, it will just not be restricted.
Here is yet another and even more offensive source of noise! This compressor is located in the master stateroom. The new configuration will have only the air handler in the room. Even so, care will be taken to make sure that it is isolated with rubber mounts and housed in such a way to reduce noise as much as possible.
The air handler will push air into a "T" that splits into a 4" and 6" duct. The 6" duct will run from the air handler, located under the head of the bed and right under the cabinet, up through the corner and aft wall. We will cut a piece of teak plywood to cover the duct. Once through the wall, the air will be split three ways. 4" for overhead, 3" into lower dressing area, and 3" into the existing duct which flows forward to the head.
The original system had one 5" outlet placed mid level in the room and a 3" outlet into the head. The new system will have two 4" outlets into 4x10 vents at the ceiling level. It will also have a 3" outlet into the lower dressing area and into the head. Two returns will be placed below the foot of the bed. This photo shows the 4x10 vent (that the 4" duct goes into).
The intakes for the 10,000 BTU unit are at the foot of the Master bed. While the preference would be to place them lower, we placed them at this height for aesthetic reasons. Because the bed overhangs the vent wall, you will not be able to see them when walking into the room.
The new units are fed by the Cruiseair compressor in the engine room. This copper tubing will be run from that compressor to the air handler unit. A repeat of this process will be done for each of the three staterooms as well as for the two units in the salon.
The collector box, upper left, is glued back into one piece and fastended in place. The lower right shows the air dividers. The lowest divider breaks the 6" hose into a 6" and 3" hose, with the 3" routed to the Master Head. The next divider splits into a 3" duct that is routed to the dressing area and a 4" routed to the vent over the bed.
The unit is mounted under the Master Stateroom bunk. Silent running has been painted on four sides of this area. The electrical box and SMX control box are also mounted in this location. The copper lines have been connected and the unit is ready to be wired.
The suction and return lines are routed into the Engine Room and connected to one of the compressors. The upper unit (shown) is a 32,000 BTU moudulating system that feeds the State Rooms. The unit under it is a 24,000 BTU unit that is a split system. It is split into the port side of the Salon and the starboard side. The difference is that with the split system, one side is slave to the other. In this case, the port side of the Salon is the master with the thermostat connected to it and the starboard side is the slave.
Enclosing the unit in our application was important because of the vented air we have running under the console and floor to break the station wagon effect. Not enclosing would mean trying to continually condition outside air.
More of the maze. Air conditioning a bridge is different than a Stateroom! In a Stateroom you cool the entire room; on a bridge you need to direct cool air flow directly onto persons. Thus the need for many vents. This project is too easy to not undertake. The payoff is fantastic when done correctly.
.... these six vents to cool guests seated in the console lounge.
We had ten people on the bridge in near 100 degree muggy temperatures and did not break a sweat. It is EZ2CY we are happy with Cruisair and our Enclosure!
The Eskimo Ice shaver came with the boat and is a wonderful piece of equipment. Eskimo has since been purchased by Dometic Corp, the makers of Cruisair. We have performed an upgrade that allows better monitoring of the unit and includes a repeating control at the helm.
This machine can make 600 lbs. of shaved ice per day. It is great for margaritas or snow cones. Not to mention that when we catch fish this is the surest and quickest way to cool them down and keep them fresh.