Vaillant eco tec 615 is it big enough
- Thread starter Tally101
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How is it performing in this cold weather? If it’s not quite getting the rooms up to temperature, it might be time to change it especially, as you say, it was fitted years ago. Also depends on how well insulated your house is.
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what is the heat loss of the property?
According to
my house is average 5.4kW loss
Mottie
We have trv's on and dont heat all rooms
BRE : Domestic Annual Heat Pump System Efficiency (DAHPSE) - Estimator - BETA
Domestic Annual Heat Pump System Efficiency (DAHPSE), Electric heat pump performance estimator, heat pump efficiency
tools.bregroup.com
my house is average 5.4kW loss
Mottie
We have trv's on and dont heat all rooms
Your boiler is actually oversized so at a 5.4kW heat loss but if your 14 rads+system contin say 90L of water then it will take ~ 20/30 minutes for them to reach say 65C from a cold 15C on a morning start up which is normal enough IMO.
The table you used (posted below) seems rather vague. I think you need to be more precise about age and size to get a proper estimate of heat loss.
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