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16 votes

My new AC is under performing and guzzling too much juice, can anyone help?

I absolutely applaud your exploration of new HVAC tech. Right now, the industry (Carrier, Lennox etc.) are very much like the auto industry in 1980. They're still shoveling the same old products even ...
Harper - Reinstate Monica's user avatar
5 votes
Accepted

What is this metal object inside the hot water tank vent?

It appears to be a flue baffle. Many gas-fired water heaters have these inside the flue way to slow the movement of the flue gases (ie the heat produce by the burner) and improve the transfer of heat ...
Greg Hill's user avatar
  • 31.2k
3 votes

How do I vent 3 bathroom exhausts out the roof

The International Residential Code has commentary for M1505.2 that you should read. Technically that links to commentary from the ICC's International Tiny House Provisions, but it's a convenient ...
popham's user avatar
  • 10.4k
3 votes

Multiple vents inside and outside laundry room

2021 build, fan that runs constantly, you have exhaust and incoming air. It's either an Energy Recovery Ventilator (ERV) or a Heat Recovery Ventilator (HRV.) Assuming a competent design, which type ...
Ecnerwal's user avatar
  • 220k
2 votes

Open Vent under roof overhang

The only thing it needs is a screen to keep out birds and rodents. Put 1/4 inch mesh "hardwre cloth" over it and screw it to the soffit or the trim piece with the large washers with a small ...
Jim Stewart's user avatar
2 votes
Accepted

The gills broke off of my kitchen fan, is it still safe to operate until I can replace it?

If the fan is mounted on the ceiling you should be OK as long as you don't hit it with a mop or broom stick and don't have any loose birds flying around. If the fan is mounted on a wall or a range ...
JACK's user avatar
  • 82.2k
2 votes

Is it worth completely changing “acceptable” bath vent ducting to avoid reducing from 4” fan to 3” ducting?

I wouldn't be cutting an extra hole in my roof for 2-4" ducts. Many of the fans I've installed actually came with 4" to 3" reducers and I used them with no problems. Using a "wye&...
JACK's user avatar
  • 82.2k
2 votes

What size exhaust vent for 4 clothes dyers going 60’ with 1 elbow?

You usually don't share vents for exhausting devices. It's not a good strategy because it can result in reduced or backward flow. You want sufficient flow to prevent heat danger or dryer damage, and ...
isherwood's user avatar
  • 140k
1 vote

Cover old exhaust fan vent from outside home

There are a few things that can be done. 1- You can remove the termination plate. Fill the resulting void with wood or metal and stucco over. Paint to match and it is practically unnoticeable. 2- You ...
RMDman's user avatar
  • 32.2k
1 vote

Can HRV be filtered on the outgoing side? Ducted?

There are absolutely ways to clean a HRV (Heat Recovery Ventilator) If I were facing this situation, I would attach the HRV to a plenum and a return grill with a filter. That would be a simple setup ...
KMJ's user avatar
  • 12.1k
1 vote

How to solve mismatch vent location for downdraft cooktop?

Use one of those 4-segment round 90 degree elbows with the slip joints between each segment. When the slip joints are turned, they can straighten the elbow to a straight pipe, or provide for different ...
Triplefault's user avatar
  • 8,042
1 vote

Range hood exhausts to wood

I don't know your DIY skill level, but what I'd do personally is: Remove the cabinet. It should be screwed to the wall through the back, and possibly also to adjacent cabinets at the sides (possibly ...
Huesmann's user avatar
  • 3,910
1 vote

How to seal a heater flue joint on the roof?

First, caulk the opening where the water is getting in. Then remove the ring that is too high and doing nothing. I have had great success with covering the old boot with a new boot. ( Product ...
RMDman's user avatar
  • 32.2k
1 vote
Accepted

Exterior Water Heater venting

Straight up and out the enclosure roof, then continue straight up until the end is at least 2 feet above any obstruction within 10 feet (such as the higher part of the roof.) That may require bracing ...
Ecnerwal's user avatar
  • 220k
1 vote

My new AC is under performing and guzzling too much juice, can anyone help?

Did you replace the evaporator? Any issue, or design mismatch, there will impact performance. Otherwise, what condition is your ductwork in? Is your air handler moving enough air? Have you checked the ...
RogerDIY's user avatar
  • 108
1 vote

How to plan a vented range hood project?

To plan your vented range hood project consider the following Timing Have a time in mind of when you want this work done. Contractors may not respond or deprioritize you if you have a late start date ...
JGallardo's user avatar
  • 135
1 vote

Electrician says existing switches won't work to Install Broan CST80SLW vent fan - correct or not?

To answer this question in case anyone is curious: The electrician was wrong. I have the Same Setup as OP where I have a switch for the fan, and a switch for the light in my bathroom setup. There are ...
Ant's user avatar
  • 11
1 vote
Accepted

Can I have a shared exhaust flue for a high efficiency furnace and tankless water heater?

Even if material and size of 2 merged tubes weren't an issue, merging the 2 exhausts would still not work. The exhaust from HE gas appliances is normally relatively cool and humid. They require a ...
Ken's user avatar
  • 26

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