
Are heat pumps REALLY supposed to be this slow.to heat?
I kinda understood HPs won't do rapid heating like a gas boiler, but have only had one for about 2 weeks, and winter (still mild compared to what.itll be in a few weeks) arrived this week.
Finding it chilly, I changed the set point to 21 deg C around 6pm yesterday when the thermostat read about 19.2... looking at the glacial speed at which the temperature was increasing, I raised the heat curve to 1.4 from 1.2.
From 6pm to 10am, 16 hours, and there has been a total increase in temp by about 1.7 degrees.
Its a big, 15.5 kw Grant heatpump, the property is not badly insulated, just had under floor and loft and eve insulation put in, taking it to mid C band on EPC (btw, these 3 things, added a measly 4 points to my EPC - went from 57 to 70 with HP, and then 74 with the insulation). I'm fairly confident the heatpump is adequately sized for the property (had 3 separate detailed heayt surveys done, all came.in the 13.5 kw range.
Question really is..to all you HP veterans out there.. is this slow rise the usual with HPs, or.is.my system in need.of.some yweaks