Dehumidifier for damp garage
Discussion
Our garage has a damp problem (because half the back wall and half of one of the side walls are below ground level); we've just been quoted a small fortune for properly tanking it. I'm not keen to spend that kind of money at this time (since I don't presently keep anything particularly special in said garage) but I would like to control the damp (and resulting mould).
Garage is 6x3m with a sloped ceiling from 2.4m down to 1.9m. Unheated, roller shutter door. So...
What dehumidifier would the PH massive recommend? Do I need to heat the garage for the dehumidifier to work? If so, what's the least expensive way of doing that - workshop heater with thermostat control set to 15 degrees? I'm assuming I'll rig a permanent drain for the dehumidifier, so I imagine a wall-mounted unit will be better.
Garage is 6x3m with a sloped ceiling from 2.4m down to 1.9m. Unheated, roller shutter door. So...
What dehumidifier would the PH massive recommend? Do I need to heat the garage for the dehumidifier to work? If so, what's the least expensive way of doing that - workshop heater with thermostat control set to 15 degrees? I'm assuming I'll rig a permanent drain for the dehumidifier, so I imagine a wall-mounted unit will be better.
I've got a Meaco running 24/7 in mine. It automatically controls the humidity down to about 50% (would be up at 85-90% if I didn't have it on).
They do a few different models but if you have a drain pipe, the tank capacity is not a factor.
Make sure you choose the type which can still operate at low temperatures.
They do a few different models but if you have a drain pipe, the tank capacity is not a factor.
Make sure you choose the type which can still operate at low temperatures.
Check out dryitout. I run an 822 in our 7x7m garage. Hose out of the wall, classic Alfa etc nice & dry 
http://www.dry-it-out.com/DD822-Graphite-dehumidif...
http://www.dry-it-out.com/DD822-Graphite-dehumidif...
mikees said:
I'm wondering if I should put a rad in my garage, not that damp but gets cold, to keep my 993 C4 warm.
Over kill or worth it for a future ( current ?) classic?
Mike
A dehumidifier will put out a little heat. If you have a damp problem and you add heat from a radiator without drying the air, it can cause other problems.Over kill or worth it for a future ( current ?) classic?
Mike
I made a mistake with my first dehumidifier.
I've got a circa 20 year old double garage with only a partially boarded loft so open eaves, I have had nice Hormann insulated doors fitted and purchased an Ebac Powerdri from Screwfix for £179 this extracted a fair bit of water but on higher settings it kept freezing solid and didn't draw much when the temp dropped to 5 or below.
I bought a humidity gauge and the RH never got much below 80.
I decided to buy an Eccoair DD122 Simple as well. This is much smaller and draws far more whatever the outside temp, it regularly pulls a full tray of water overnight and another during the day.
RH now lower and continues to reduce.
I am still on with my project to get the RH right down so have done or I am on with
Stripped out the old carpet.
Chucked away loads of stuff and redistributed bikes and stuff to sheds.
Chucked out old kitchen units and bought some shelving/ racking from big dug and that went together really nicely.
Have fitted loft ladder, much safer than jumping off the top of step ladders
Last weekend floor painted the conc floor - rather ironically I had the leave the cars out Sunday night when it was chucking it down as the floor wasn't dry.
Need to fit loft hatch
Bought the timber to fully board the loft so the eaves ventilation only flows through the loft space.
Need to get rubber bump strip as doors are level but floor thresholds aren't.
Need to drill holes through the walls to permanently pipe up drain points from dehumidifiers as emptying am and pm is a pain.
Get bigger shed for garden....
Anyway back to the point I would not buy another refrigerant type dehumidifier for low temperature environment I would go with a desiccant one instead.
Hope this helps.
I've got a circa 20 year old double garage with only a partially boarded loft so open eaves, I have had nice Hormann insulated doors fitted and purchased an Ebac Powerdri from Screwfix for £179 this extracted a fair bit of water but on higher settings it kept freezing solid and didn't draw much when the temp dropped to 5 or below.
I bought a humidity gauge and the RH never got much below 80.
I decided to buy an Eccoair DD122 Simple as well. This is much smaller and draws far more whatever the outside temp, it regularly pulls a full tray of water overnight and another during the day.
RH now lower and continues to reduce.
I am still on with my project to get the RH right down so have done or I am on with
Stripped out the old carpet.
Chucked away loads of stuff and redistributed bikes and stuff to sheds.
Chucked out old kitchen units and bought some shelving/ racking from big dug and that went together really nicely.
Have fitted loft ladder, much safer than jumping off the top of step ladders
Last weekend floor painted the conc floor - rather ironically I had the leave the cars out Sunday night when it was chucking it down as the floor wasn't dry.
Need to fit loft hatch
Bought the timber to fully board the loft so the eaves ventilation only flows through the loft space.
Need to get rubber bump strip as doors are level but floor thresholds aren't.
Need to drill holes through the walls to permanently pipe up drain points from dehumidifiers as emptying am and pm is a pain.
Get bigger shed for garden....
Anyway back to the point I would not buy another refrigerant type dehumidifier for low temperature environment I would go with a desiccant one instead.
Hope this helps.
Desiccant dehum is what you need as they 1) work down to almost freezing and 2) will kick out a little heat as part of the process.
Meaco DD8L is a good option but you'll need to keep it on the tube so its continuously removing water - I've just bought one to replace another desiccant dehum which died and its taken 2 litres of water out (of an internal room) every 12 hours. £180 at Maplins.
http://www.meaco.com/proddetail.php?prod=DD8L
FFG
Meaco DD8L is a good option but you'll need to keep it on the tube so its continuously removing water - I've just bought one to replace another desiccant dehum which died and its taken 2 litres of water out (of an internal room) every 12 hours. £180 at Maplins.
http://www.meaco.com/proddetail.php?prod=DD8L
FFG
964Cup said:
Thanks all. Looks like a Meaco DD8L with a wallmount kit and permanent drain.
Would it be a fair assumption that it will be more efficient if it is positioned closer to the source of the damp?
Run DD8L myself on 24/7 in my garage, placement not really an issue tbh, especially as these things are sold on the basis of de-humidifying 5 bed houses etc.Would it be a fair assumption that it will be more efficient if it is positioned closer to the source of the damp?
I can recommend oversizing the dehumidifier if you plan to park a wet car in the garage.
My experience is that more powerful appliances are more expensive to buy but the cost of running a 1000W device two hours per day will be the same as running a 80W device running all day long. The bigger dehumidifier will have a much easier time dealing with peaks (i.e. wet car in the garage).
We use this FDNP96 for our 8 car garage with a drain pump.
When set to 55% RH I can park a dripping wet car in the garage and the humidity won't move in the slightest. Power consumption (measured at the socket) is the same as when I used a much smaller 80W device which had to be on 24 hours a day.
http://www.fral.it/en/products/drying/professional...
My experience is that more powerful appliances are more expensive to buy but the cost of running a 1000W device two hours per day will be the same as running a 80W device running all day long. The bigger dehumidifier will have a much easier time dealing with peaks (i.e. wet car in the garage).
We use this FDNP96 for our 8 car garage with a drain pump.
When set to 55% RH I can park a dripping wet car in the garage and the humidity won't move in the slightest. Power consumption (measured at the socket) is the same as when I used a much smaller 80W device which had to be on 24 hours a day.
http://www.fral.it/en/products/drying/professional...
Squadrone Rosso said:
Check out dryitout. I run an 822 in our 7x7m garage. Hose out of the wall, classic Alfa etc nice & dry
http://www.dry-it-out.com/DD822-Graphite-dehumidif...
^^^^ This. If got 2 of these. Does the job, and being dessicant based will work all the time.http://www.dry-it-out.com/DD822-Graphite-dehumidif...
Squadrone Rosso said:
monkfish1 said:
This is the smallest dessicant one they do.
Buying a cheaper normal one is a false economy.
Indeed. Buy cheap, pay twice.Buying a cheaper normal one is a false economy.
Been in service now for over 4 years with no issues. Connected a permanent drain pipe straight through the wall to outside and is fit and forget.
Gassing Station | Homes, Gardens and DIY | Top of Page | What's New | My Stuff