| Author | Message | ||
| Kevin L. O'Connor (Pizza_708)
Registered Member Username: Pizza_708 Post Number: 1 Registered: 7-2008 Posted From: 67.236.254.124 Rating: N/A |
This has probably been ask before,and I looked but didn't find anything. What are the pros and cons on roof top air and basement air? On roof how do you determind how many for an H3 40? I have an 01 but it is just to tierd to keep going. It's time to put her to sleep. | ||
| Bill 340 (Bill_340)
Registered Member Username: Bill_340 Post Number: 63 Registered: 7-2006 Posted From: 70.220.153.120 Rating: N/A |
I have 3 roof airs on our H and we love them, little noisy compared to basement, but WAY cheaper to buy and repair.By the way you must use low profile on a H . just watch your height, we are 13 feet 4 in, | ||
| James Stacy (Jimstacy)
Registered Member Username: Jimstacy Post Number: 142 Registered: 1-2001 Posted From: 75.41.24.109 Rating: N/A |
Rooftops are cheaper, easier to service, more efficient. Bay units are usually quieter, prettier, but take up a lot of bay room. A well insulated (hot spray foam) 40' coach will be comfortable in most parts of the US with two roof airs. Death Valley, 45' long, fiberglass or no insulation, poor window treatment, could be hard for three. Where you are and how cool you want to be are part of the formula. Properly done, the needed BTU's should be calculated but until you know what the structure, efficiency, ambient conditions, etc are "IT ALL DEPENDS" | ||
| Luvrbus (Luvrbus)
Registered Member Username: Luvrbus Post Number: 459 Registered: 8-2006 Posted From: 71.30.179.250 Rating: N/A |
I think but not for sure that all H Prevosts are foamed at the factory my H-41 is.I noticed very few VIP H-45 have roof airs but the ones I have seen have 4 to 6 roof tops maybe a over kill but I would use 3 15,000 btu never to much AC in AZ this time of the year | ||
| marvin pack (Gomer)
Registered Member Username: Gomer Post Number: 270 Registered: 3-2007 Posted From: 71.55.193.220 Rating: N/A |
Hey I heard that coaches that have 4-6 units on top are only 9000/10000 btu's so that will explain why so many and I think that more compartments inside doesn't need the BIG units. gomer | ||
| Luvrbus (Luvrbus)
Registered Member Username: Luvrbus Post Number: 460 Registered: 8-2006 Posted From: 71.30.179.250 Rating: N/A |
Gomer, I believe that a 11,000 BTU is the smallest Penguin made and that is the only type I have saw on a H-45 but I was wrong once before LOL | ||
| Buswarrior (Buswarrior)
Registered Member Username: Buswarrior Post Number: 1323 Registered: 12-2000 Posted From: 76.68.135.222  Rating: N/A |
FWIW, the Entertainer coaches are over-engineered on purpose for redundancy. The coach can keep on going with a failure or two up on the roof. That, and some form of envy on the part of the unknowing... happy coaching! buswarrior | ||
| H3-40 (Ace)
Registered Member Username: Ace Post Number: 884 Registered: 10-2004 Posted From: 206.53.144.5  Rating: N/A |
I have 3 coleman mach 3's on my H model that are low profiles! Have worked great with exception of one capacitor! I have one of the three on 24/7 here in Florida during the summer months and it stays quite comfortable. Ace | ||
| Kevin L. O'Connor (Pizza_708)
Registered Member Username: Pizza_708 Post Number: 2 Registered: 7-2008 Posted From: 67.236.254.124 Rating: N/A |
Thaks all it is a great help. When I did my first coach BN was just gettig started, I was prety much on my own. It is really nice to have all these brains to pick now. Thanks again Kevin. | ||
| FAST FRED (Fast_fred)
Registered Member Username: Fast_fred Post Number: 412 Registered: 10-2006 Posted From: 65.160.122.70 Rating: |
The reason to use many many smaLL ROOFTOPS IS TO BE SURE one IS ON MOST OF THE TIME. a BIG UNIT MAY BE ABLE TO COOL THE COACh , SO RAPIDLY THAT IT5 CYCLES FREQUENTLY,that there is little or NO dehumidification. By having one constant ON unit the moisture is removed. For down the road coaches the advantage goes to the carbunkles ,cheap, noisy but powerfull and with built in returns (hot air rises). For the live aboard the advantage goes to a good basement setup, Silent , no arctic blasts and will cool the entire coach efficiently. And there neither ugly , or a give away that the bus is a camper, and the lack of the hight of the carbunkles allows more access to town. FF | ||
| Douglas Wotring (Tekebird)
Registered Member Username: Tekebird Post Number: 375 Registered: 10-2004 Posted From: 71.59.75.212 Rating: |
the primary reason for the multiple units ( 5 or so) on entertainer coaches is that they are very compartmentalized inside. the multiple unnits is cheap and efficient zoning | ||
| Luvrbus (Luvrbus)
Registered Member Username: Luvrbus Post Number: 463 Registered: 8-2006 Posted From: 71.30.179.250 Rating: N/A |
Doug, a friend of mine has a Marathon conversion that has 5 units on the roof and it is not a enterainer coach it is a 2006.If they do not use all of the units what is the purpose of the 20kw genearators most of these conversions use just a question.another doctor friend of mine has 2 basement airs on his H-45. | ||
| Douglas Wotring (Tekebird)
Registered Member Username: Tekebird Post Number: 376 Registered: 10-2004 Posted From: 71.59.75.212 Rating: |
quite possible thats the way your freinds coach was spec'd out. roof airs is a cheaper route....and depending on where they were told it would operate perhaps it indeed needed 5 roof airs. Additioanlly, if your roof air craps out....you just slap a new one in. My comment was on entertainer coaches, and that is a main reason for the high # of rooftops..... that and redundancy and that fact that most Entertainer/sleeper coaches don;t have Coach air. as they want as much storage as possible. 20kw genset: most likely because the people using the coach do not care about power draw or management......so they spec a 20kw so everyone can plug something into every outlet and turn them all on at the same time with no issues. | ||
| Luvrbus (Luvrbus)
Registered Member Username: Luvrbus Post Number: 464 Registered: 8-2006 Posted From: 71.30.179.250 Rating: N/A |
Doug, I just noticed that all of the conversions had 5 along with the 12G faring to hide them and was told by Marathon you need this because the roof airs change the driving characteristics of the bus may or may not be true. | ||
| Randy Davidson (Rdavidson)
Registered Member Username: Rdavidson Post Number: 12 Registered: 7-2006 Posted From: 69.19.14.17 Rating: N/A |
We have 3 DuoTherm High-Effeciency airs on the roof of our H3-40. One is on all the time. We just shift from front to back depending if we are sleeping or in the sitting area. They work ok when sitting but it can get warm in the front with two on while driving. I will say they are noisy and they make me 13' 3" tall. I'll look into lower units when these fail. And, that's one of the good points, I can replace them. |
