J
johnnymc
Hi, New to the forum, experienced DIYer, looking for some advise.
I am currently exploring upgrading our back boiler unit to an Aquatherm 34KW log stove and am unsure about which type of cylinder would be best for our situation.
The cylinder now is vented and gravity fed with two coils, one for oil, one for back boiler, we intend to add solar hot water to the system when we win the lottery! so need to factor this in to the new tank to be sourced.
I have 2 X 3bar pumps on the domestic water system to pump hot and cold water through the house as we have very little head.
there is not much Space available for the new cylinder. only about 60 to 70cm dia by max 180cm high so only suitable for between 350 and 450 ltr tank, would like to avoid a buffer tank.
I am of a mind to get a 350-450ltr gravity fed cylinder with solar coil and 2 other coils for oil and wood stove and draw the Hot water off and run the heating off the system as we currently do,thus avoiding the heat exchangers for DHW and central heating
I am concerned that the DHW heat exchangers would have trouble coping with 3bar feed pushing 45 to 70 Ltr of water per min depending on demand,( according to pump Manufacturer)
Can a thermal store be used with gravity fed ?
can the DJW coils cope with such a demand?
I am also unsure, given the relative small size of the tank that the extra cost of a thermal store would really be value for money, as with such a small store, we will still need to run wood or oil to be able to heat the house, given we are a household of 5 people, i am also assuming that in the summer months solar would be able to manage the requirement of hot water with a smaller cylinder using immersion as backup, .?
I appreciate your comments, suggestions.
I have also some questions about laddomat valves and zoning the system, but will wait till the tank issue is resolved but i am wondering is better to post those questions here, or in the central heating section ?
thanks
I am currently exploring upgrading our back boiler unit to an Aquatherm 34KW log stove and am unsure about which type of cylinder would be best for our situation.
The cylinder now is vented and gravity fed with two coils, one for oil, one for back boiler, we intend to add solar hot water to the system when we win the lottery! so need to factor this in to the new tank to be sourced.
I have 2 X 3bar pumps on the domestic water system to pump hot and cold water through the house as we have very little head.
there is not much Space available for the new cylinder. only about 60 to 70cm dia by max 180cm high so only suitable for between 350 and 450 ltr tank, would like to avoid a buffer tank.
I am of a mind to get a 350-450ltr gravity fed cylinder with solar coil and 2 other coils for oil and wood stove and draw the Hot water off and run the heating off the system as we currently do,thus avoiding the heat exchangers for DHW and central heating
I am concerned that the DHW heat exchangers would have trouble coping with 3bar feed pushing 45 to 70 Ltr of water per min depending on demand,( according to pump Manufacturer)
Can a thermal store be used with gravity fed ?
can the DJW coils cope with such a demand?
I am also unsure, given the relative small size of the tank that the extra cost of a thermal store would really be value for money, as with such a small store, we will still need to run wood or oil to be able to heat the house, given we are a household of 5 people, i am also assuming that in the summer months solar would be able to manage the requirement of hot water with a smaller cylinder using immersion as backup, .?
I appreciate your comments, suggestions.
I have also some questions about laddomat valves and zoning the system, but will wait till the tank issue is resolved but i am wondering is better to post those questions here, or in the central heating section ?
thanks