Seaward Calorifier

[thelettingskid]

Hi All,

I bought a 2000 Corvette 320 just over a year ago and have noticed the Seaward calorifier (model F-1150-W) heats the water very well but it cools surprisingly quickly.

Our old boat had an "old fashioned" water heater and it stayed hot (or at least warm) for around 3 days. However, the Seaward is cool/cold by the next day.

I thought it might just be a small heater but it seems it is 50L so plenty for a shower or two I'd hope!

Has anyone else had a similar issue? Any advice greatly appreciated.

Cheers,

David

 

[Plum]

Hi All,

I bought a 2000 Corvette 320 just over a year ago and have noticed the Seaward calorifier (model F-1150-W) heats the water very well but it cools surprisingly quickly.

Our old boat had an "old fashioned" water heater and it stayed hot (or at least warm) for around 3 days. However, the Seaward is cool/cold by the next day.

I thought it might just be a small heater but it seems it is 50L so plenty for a shower or two I'd hope!

Has anyone else had a similar issue? Any advice greatly appreciated.

Cheers,

David

Hi, I have a Seaward model F650, same but smaller, 23 litres, I too was disappointed with the heat loss so added 50mm of insulation around three sides and the top plus partial insulation on the side of the pipes and heating element. Made a big improvement to the water temperature for a shower 24 hours later.

As an added bonus I fitted a thermostatic mixer valve just before the shower taps (there is no thermostatic valve at the calorifier) and set it to the perfect shower temperature for me at 38 degrees, so all i do is just open the hot tap and no matter what the water temp in the calorifier is (assuming it is above 38) so no wasting water while adjusting temperature and with the hotter water due to the insulation less hot water is used so easily enough for 2 showers and washing up after breakfast.

With your bigger calorifier you should get more showers or more days of hot water after insulating. The more insulation the better.

Www.solocoastalsailing.co.uk

 

[thelettingskid]

Oh, I have plenty of room to add additional insulation. Thank you for the advice!

 

[Plum]

Oh, I have plenty of room to add additional insulation. Thank you for the advice!

I've just added some more in my post above....

 

[thelettingskid]

Thank you again. I shall report back!

 

[vas]

also got a 60lt (I think) seaward calorifier. Due to the awkward square size of the surrounding tin box, it wouldn't fit where I wanted it in the e/r. So ripped the cover apart and found some v.cheap not at all dense rockwool or something similar insulation inside.
So, I'd open up the top lid, slide out the insulation, measure, get decent heavy one and replace.

 

[thelettingskid]

Hi Both, thank you for the great advice. I have now upgraded the insulation inside the casing and added a lot of insulation to the outside of the casing. I now have a very fluffy white box!

I'm going away this weekend on the boat and am sure it will help.

Thank you again,

David

 

[vas]

Hi Both, thank you for the great advice. I have now upgraded the insulation inside the casing and added a lot of insulation to the outside of the casing. I now have a very fluffy white box!

I'm going away this weekend on the boat and am sure it will help.

Thank you again,

David

fluffy box will become v.ugly looking once damp/wet. see how it works and wrap it up with something to keep the insulation in place long term.