Los Angeles may be known for its sun-drenched beaches and mild climate, but the region’s indoor humidity levels can dip to uncomfortable lows—especially in winter or during extended HVAC runs. Dry air can aggravate respiratory issues, parch wooden floors, and even contribute to static shocks. Enter the HCWP18 whole-home humidifier from Around The Clock Heating and Air Conditioning: a robust solution designed to integrate seamlessly with your existing HVAC system, delivering balanced moisture to every room. In this deep-dive guide, we’ll explore why proper humidity matters in LA homes, walk through the HCWP18’s features, sizing guidelines, installation process, ongoing maintenance, and why Around The Clock is your local expert for indoor comfort.
Why Humidity Matters in Southern California
While Southern California rarely experiences bone-dry desert extremes, indoor humidity often falls below the optimal 40–60% range—the sweet spot for comfort and health.
- Respiratory Health
Dry air can irritate nasal passages, aggravate asthma, and increase susceptibility to colds and flu. Maintaining proper moisture levels helps mucous membranes trap airborne pathogens more effectively. - Wood and Furnishings
Hardwood floors, cabinets, and musical instruments can crack or warp when humidity dips too low. A whole-home humidifier protects your valuable finishes and prolongs the lifespan of wooden assets. - Energy Efficiency
Properly humidified air feels warmer at lower thermostat settings. You might set your thermostat a degree or two lower and still feel cozy—saving on heating costs even in LA’s mild winters. - Static Electricity
Ever felt that surprising zap when touching a doorknob? Low humidity increases static build-up on carpets and fabrics. Balancing indoor moisture reduces those unwelcome shocks.
By addressing these issues, a whole-home system like the HCWP18 delivers consistent, automated humidity control—no more juggling portable humidifiers or filling trays.
HCWP18 System Overview
The HCWP18 is a bypass-style humidifier engineered to work with forced-air HVAC systems of all sizes. Let’s break down its core components:
- Durable Water Panel
A corrosion-resistant evaporator pad treats incoming water, dispersing moisture evenly into the air stream. Replacement panels are easy to swap—about once per year under normal conditions. - Integrated Bypass Duct Adapter
Rather than forcing humidified air through a separate fan, the HCWP18 uses your existing furnace blower. A bypass duct directs a portion of warm air through the water panel before rejoining the main airflow. - Automatic Electronic Control
The included humidistat monitors indoor relative humidity and cycles the HCWP18 on or off to maintain your setpoint (typically 45–50% in LA homes). A wall-mounted control lets you fine-tune settings. - Self-Draining Design
Excess water drains automatically, preventing stagnation and mineral buildup. Hard-water areas may benefit from an upstream scale inhibitor—ask our technicians about water-softening options. - Compatibility
Suitable for HVAC systems ranging from 1.5 to 5 tons, making the HCWP18 a versatile choice for single-family homes, condos, and even small commercial spaces.
Learn more about HCWP18 specifications on our product page:
aroundclock.com/humidifiers/hcwp18
How the HCWP18 Compares to Portable Units
Feature | HCWP18 Whole-Home | Portable Humidifiers |
---|---|---|
Coverage | Entire home (up to 3,000 sq ft) | Single room (200–500 sq ft) |
Automation | Automatic humidistat control | Manual fill and monitor |
Maintenance | Annual water-panel change | Frequent tank refills and cleaning |
Noise | Whisper-quiet (uses furnace blower) | Fan noise on high speed |
Energy Impact | Low incremental cost | Higher per-unit fan energy |
Air Quality | Filtered, evaporative moisture | Potential mold/bacteria if not cleaned diligently |
Whole-home systems eliminate the daily chore of refilling buckets and worrying about mold growth in stagnant water. They also deliver balanced humidity to every living space—including hallways and bathrooms—whereas portable units often leave gaps.
Proper Sizing and Placement
Getting the right performance hinges on matching humidifier capacity to your home’s volume and furnace size.
- Calculate Home Volume
Multiply square footage by ceiling height. A 2,000 sq ft home with 8-ft ceilings has 16,000 ft³ of air. - Determine Required Output
The HCWP18 provides up to 18 gallons per day of moisture—suitable for homes up to 3,000 sq ft under typical LA winter conditions. - Locate Bypass Connection
Our technicians install the bypass adapter on the warm-air plenum side of your furnace, with the return-air side connected upstream. Ideal placement ensures uniform moisture distribution. - Control Location
Mount the humidistat on an interior wall away from direct drafts, sunlight, or heat sources for accurate readings.

During your free in-home assessment, we’ll measure duct dimensions, airflow, and home layout to confirm optimal installation. Schedule yours here:
aroundclock.com/virtualdiagnostic
Professional Installation & Service
While a savvy DIYer might tackle basic humidifier installs, professional setup guarantees peak performance and warranty protection:
- Precision Ductwork
We fabricate custom bypass connections and seal joints to prevent moisture leaks. - Electrical Hookup
The HCWP18’s electronic control demands dedicated low-voltage wiring to your furnace control board—our certified technicians handle the wiring safely and neatly. - System Calibration
We test airflow and humidity response, adjusting fan speeds or duct dampers if necessary to fine-tune output. - Ongoing Maintenance Plans
Choose a ComfortGuard Plan for biannual checkups: water-panel replacement, drain cleaning, control recalibration, and system diagnostics. Learn more:
aroundclock.com/specials/comfortguard
Energy Efficiency & Cost Considerations
Running a whole-home humidifier adds only pennies per day to your energy bill:
- Furnace Runtime: Humidification occurs only when the furnace blower runs—typically 5–10 minutes per cycle in moderate climates.
- Water Usage: At 18 gal/day maximum, your water costs remain minimal.
- Thermostat Savings: Proper humidity can let you lower your thermostat by 1–2°F without sacrificing comfort, offsetting any added costs.
Typical installation investment ranges from $800–$1,200, depending on duct complexity and home size. With annual maintenance of around $100, the HCWP18 delivers long-term value by protecting your home and health.
Integrating with Smart Home Systems
For tech-savvy Angelenos, we offer optional Wi-Fi enabled controls that integrate with popular smart thermostats (Nest, ecobee) and home platforms (Alexa, Google Home). You can:
- Monitor Humidity Remotely: Check indoor RH levels via app.
- Set Custom Schedules: Boost humidity during nighttime or specific hours.
- Receive Maintenance Alerts: Get push notifications when it’s time to replace your water panel.
Ask about our Smart Home Upgrade package during your installation:
aroundclock.com/contact
Helpful Links
- HCWP18 Product Details & Specs
- Schedule Your Free In-Home Humidity Assessment
- ComfortGuard Maintenance Plans
- Indoor Air Quality Blog: Humidity Tips
- Contact Around The Clock HVAC
Frequently Asked Questions
How do I know if my Los Angeles home needs a whole-home humidifier?
If indoor RH regularly drops below 35%, you may experience dry skin, sore throats, or static shocks—signs that a system like the HCWP18 can help.
What maintenance does the HCWP18 require?
Plan for an annual water-panel replacement and a quick biannual drain-line flush. Under our ComfortGuard Plan, we handle it all.
Will a humidifier worsen mold or mildew problems?
No—evaporative bypass humidifiers add moisture gradually. Proper ventilation and following maintenance guidelines prevent excess humidity that could contribute to mold.
How long does installation take?
Most installations complete in 3–5 hours, including ductwork modifications, wiring, and calibration.
Can I install the humidifier myself?
We strongly recommend professional installation to ensure proper duct connections, electrical wiring, and warranty coverage.
Does the HCWP18 work with heat pumps?
Yes, with an optional fan-powered humidifier kit. Ask our team for details during your assessment.
Is a bypass humidifier better than a fan-powered model?
Bypass units are quieter and use existing blower power; fan-powered models deliver moisture faster but consume more energy. We’ll help you choose based on home size and noise preference.
How do I adjust humidity levels?
Use the wall-mounted humidistat to set your target RH (40–50% recommended). The system cycles on/off automatically to maintain that setpoint.
Will whole-home humidification affect my energy bills?
Proper indoor humidity can improve perceived warmth, allowing lower thermostat settings. The small increase in furnace runtime is typically offset by heating savings.
What warranty covers the HCWP18?
Around The Clock offers a 5-year parts warranty on the humidifier and a 1-year labor warranty. Extended coverage available through our ComfortGuard Plan.