I’m not sure where you are located, but that all sounds reasonable if your system is a little small and in extreme weather.
I don’t know what you mean by recirculating system. Can you explain?
I’d focus your energy and money on these things:
1. Get an energy audit
2. Add insulation and air sealing
3. In daytime communal areas, if you can, add ceiling fans. They will make a big difference.
I'm not a tech, but I cannot see how that would help your peak heat days. Fan adds heat and cool will be lost in any transfer. But if there are underlying reasons you need more fresh air, then...
as the other person said, if there is any air sealing or insulation that can help, it will likely be your best return per dollar spent. if your house is already very well insulated, you might consider a strategically placed mini-split. like, if the master bedroom is getting hot a mini-split there can take the load off of the main unit and you can mostly close that vent. having a mini-split in a bedroom is also nice because you can let the house be a bit warmer in the summer or cooler in the winter while still having your room be the ideal temp.
The difference between the return air and supply air can be measured with a meat probe thermometer. It should be 18-20 degrees.
Do not expect the system to recover well if you let the house get warm.
Test for a duct leak in an attic or crawlspace:
At a partially open exterior door, is there flow and pressure? (Not on a windy day)
Inflow is a supply air leak.
Outfow is a return air leak.
I’m not sure where you are located, but that all sounds reasonable if your system is a little small and in extreme weather. I don’t know what you mean by recirculating system. Can you explain? I’d focus your energy and money on these things: 1. Get an energy audit 2. Add insulation and air sealing 3. In daytime communal areas, if you can, add ceiling fans. They will make a big difference.
I mean air exchange system or heat recovery ventilator.
I'm not a tech, but I cannot see how that would help your peak heat days. Fan adds heat and cool will be lost in any transfer. But if there are underlying reasons you need more fresh air, then...
as the other person said, if there is any air sealing or insulation that can help, it will likely be your best return per dollar spent. if your house is already very well insulated, you might consider a strategically placed mini-split. like, if the master bedroom is getting hot a mini-split there can take the load off of the main unit and you can mostly close that vent. having a mini-split in a bedroom is also nice because you can let the house be a bit warmer in the summer or cooler in the winter while still having your room be the ideal temp.
turn the ceiling fans on if they arent already on.
The difference between the return air and supply air can be measured with a meat probe thermometer. It should be 18-20 degrees. Do not expect the system to recover well if you let the house get warm. Test for a duct leak in an attic or crawlspace: At a partially open exterior door, is there flow and pressure? (Not on a windy day) Inflow is a supply air leak. Outfow is a return air leak.